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Cuinse2 Nanocrystal Photovoltaics
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Book Synopsis CuInSe2 Nanocrystal Photovoltaics by : Daniel William Houck
Download or read book CuInSe2 Nanocrystal Photovoltaics written by Daniel William Houck and published by . This book was released on 2019 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanocrystal based photovoltaics (PVs) have the potential to be printed at room temperature on a variety of substrates with the performance and stability required to enable low-cost, lightweight portable power applications. CuInSe2 nanocrystal (PVs), fabricated using methods like those developed for polycrystalline CuIn [subscript x] Ga [subscript 1-x] Se2 (CIGS) PVs, have exhibited some success in this direction, but the efficiency of the devices has been limited. Simulations of CuInSe2 nanocrystal photovoltaic devices using Solar Cell Capacitance Simulator (SCAPS) software indicate that higher performance is not likely to be achieved though ligand exchange procedures that influence the nanocrystals’ electron affinity, as reported for PbS nanocrystal photovoltaics. Higher PV performance requires a combination of increased carrier mobility and longer carrier lifetimes. Both are influenced by the capping ligand chemistry and the presence of defects in the nanocrystals. The nanocrystal synthesis conditions are critical for controlling the defects and phase of the nanocrystal products. X-ray diffraction (XRD) shows that CuInSe2 tends to form the tetragonal chalcopyrite structure while under fast nucleation conditions CuIn [subscript x] Ga [subscript 1-x] Se2 nanocrystals form the hexagonal wurtzite phase. Raman spectroscopy has shown that the CuInSe2 nanocrystals contain a significant concentration of InC [subscript u]+2V [subscript Cu] pair defects that depends on the synthesis conditions. These pair defects tend to order under light excitation and can be eliminated by high temperature annealing. Proton Nuclear Magnetic Resonance (1H NMR) spectroscopy indicates that the oleylamine and diphenylphosphine capping ligands used in a typical CuInSe2 nanocrystal synthesis bind strongly to the nanocrystal surface and exhibit very limited desorption. The addition of I2 induces ligand desorption and facilitates ligand exchange on these nanocrystals. Furthermore, the tightly bound ligands do not evaporate when heated under inert conditions, like the free molecule would. The bound ligands are found to form disordered sp2 carbon that vaporizes over tens of minutes. These studies provide insight for improving the performance of CuInSe2 nanocrystal photovoltaics by showing that the ligand chemistry and defects in CuInSe2 are relatively unique compared to other types of nanocrystals
Book Synopsis Development of Solution Processed, Flexible, CuInSe2 Nanocrystal Solar Cells by : Vikas Reddy Voggu
Download or read book Development of Solution Processed, Flexible, CuInSe2 Nanocrystal Solar Cells written by Vikas Reddy Voggu and published by . This book was released on 2017 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Clean sources of energy, especially photovoltaics (PVs), are urgently needed to cope with global energy shortage and environmental pollution. For PVs to play a significant role in energy production, the current prices must be brought down. Thin film PVs made using layered Mo or Au/CuInGaSe2(CIGS)/CdS/ZnO/ITO have already shown high efficiencies. Traditionally, most layers in CIGS solar cells are deposited using high-cost techniques requiring high temperatures and ultra-low pressures. By replacing the traditionally processed CIGS with a nanocrystal layer that can be deposited at mild processing conditions, the fabrication cost can be reduced. In this study, a high yielding synthesis method for CuInSe2 nanocrystals has been developed which gives the best efficiency (3.1%), so far, for low-temperature processed CuInSe2 nanocrystal PVs. An important challenge that nanocrystal solar cells currently face is low device efficiency, resulting in higher operating cost. CuInSe2 nanocrystals can remain suspended in solution because of the long chain organic ligands attached to the surface. However, these ligands hinder charge transfer between nanocrystals causing low device efficiency. These ligands have been successfully replaced with smaller sulfide ions thereby improving the best efficiency of low-temperature processed CuInSe2 nanocrystal solar cells from 3.1 % to 3.5%. Another approach to reducing the cost of CuInSe2 PVs is by replacing the glass support medium with cheaper alternatives like paper. Flexible CuInSe2 nanocrystal solar cells are successfully fabricated on paper with efficiencies reaching up to 2.25%. This is the first time a nanocrystal solar cell has been fabricated on paper. There is no significant loss in PV device performance after more than 100 flexes to 5 mm radius, and the devices continue to perform when folded into a crease. Apart from the absorber layer, the replacement of other high-temperature and vacuum processed device layers with ambient solution-processed layers lowers the manufacturing cost. This has been achieved by spin coating suitable nanomaterials as device layers. Lastly, for commercialization of CuInSe2 nanocrystal solar cells, multiple devices need to be connected to achieve the desired current and voltage. A fabrication process has been developed for building multiple nanocrystal PVs on a single substrate using 3D printed masks
Book Synopsis CuInSe2 Nanowires and Earth-abundant Nanocrystals for Low-cost Photovoltaics by : Chet Reuben Steinhagen
Download or read book CuInSe2 Nanowires and Earth-abundant Nanocrystals for Low-cost Photovoltaics written by Chet Reuben Steinhagen and published by . This book was released on 2013 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Widespread commercialization of photovoltaics (PVs) requires both higher power conversion efficiencies and low-cost, high throughput manufacturing. High efficiencies have been achieved in devices made from materials such as CuIn[subscript x]Ga1−[subscript x]Se2 (CIGS). However, processing of these solar cells still requires high temperature and vacuum, driving up cost. A reduction in manufacturing costs can be achieved by utilizing colloidal nanocrystals. Semiconductor nanocrystals can be dispersed in solvents and deposited via simple and scalable methods under ambient conditions to form the absorber layer in low-cost solar cells. Efficiencies of ~3% have been achieved with CIGS nanocrystal PVs, but this must be improved substantially for commercialization. These devices suffer from poor charge transport in the nanocrystal layer. Here, the synthesis of nanowires and their utilization in solar cells was explored as a way to improve charge transport. CuInSe2 (CIS) nanowires were synthesized via the solution-liquid-solid method. PV devices were fabricated using the nanowires as the light absorbing layer, and were found to exhibit a measureable power output. Earth-abundant materials were also explored, motivated by the material availability concerns associated with CIGS. Pyrite FeS2 nanocrystals were synthesized via an arrested precipitation reaction to produce phase-pure particles 15 nm in size. These nanocrystals were spray coated to form the active layer in several different common device architectures. These devices failed to produce any power output. The material was determined to be slightly sulfur deficient, leading to a high carrier concentration and metallic behavior in the thin films, with conductivities measured to be ~5 S/nm. A nanocrystal synthesis of Cu2ZnSnS4 (CZTS) was also developed to produce highly dispersible crystalline particles ~11 nm in size. These nanocrystals were spray coated onto glass substrates to form the absorber layer in test PV devices, and an efficiency of 0.23% was achieved without high-temperature or chemical post-processing. Additional studies included the synthesis of CZTS nanorods and their incorporation into functioning solar cells. The selenization of CZTS nanocrystal films was also studied as a way to improve solar cell performance. High temperature annealing in a Se atmosphere was found to produce CZTS(Se) layers, which could be used in working PV devices.
Book Synopsis Low Cost Processing of CuInSe2 Nanocrystals for Photovoltaic Devices by : Carl Jackson Stolle
Download or read book Low Cost Processing of CuInSe2 Nanocrystals for Photovoltaic Devices written by Carl Jackson Stolle and published by . This book was released on 2015 with total page 390 pages. Available in PDF, EPUB and Kindle. Book excerpt: Semiconductor nanocrystal-based photovoltaics are an interesting new technology with the potential to achieve high efficiencies at low cost. CuInSe2 nanocrystals have been synthesized in solution using arrested precipitation and dispersed in solvent to form a "solar ink". The inks have been deposited under ambient conditions to fabricate photovoltaic devices with efficiency up to 3%. Despite the low cost spray coating deposition technique, device efficiencies remain too low for commercialization. Higher efficiencies up to 7% have been achieved using a high temperature selenization process, but this process is too expensive. New nanocrystal film treatment processes are necessary which can improve the device efficiency at low cost. To this end, CuInSe2 nanocrystals were synthesized using a diphenyl phosphine:Se precursor which allows for precise control over the nanocrystal size. The size is controlled by changing the temperature of the reaction. The smallest size nanocrystals demonstrated extremely high device open circuit voltage. Ligand exchange procedures were used to replace the insulating oleylamine capping ligand used during synthesis with more conductive halide ions or inorganic chalcogenidometallate cluster (ChaM) ligands. These ligands led to improved charge transport in the nanocrystal films. A high-intensity pulsed light processing technique known as photonic curing was used which allows for high temperature sintering of nanocrystal films on temperature-sensitive substrates. High energy pulses cause the nanocrystals to sinter into large grains, primarily through melting and resolidification. The choice of metal back contact has a dramatic effect on the final film morphology, with Au and MoSe2 back contacts providing much better adhesion with the CuInSe2 than Mo back contacts. Nanocrystal sintering without melting can be achieved by replacing the oleylamine ligands with ChaM ligands prior to photonic curing. Low energy photonic curing pulses vaporize the oleylamine ligands without inducing sintering or grain growth. This greatly improved nanocrystal coupling and interparticle charge transport. Multiexcitons were successfully extracted from these nanocrystal films and external quantum efficiencies over 100% were observed. Transient absorption spectroscopy was used to study the multiexciton generation process in CuInSe2 nanocrystal films and colloidal suspensions. The multiexciton generation efficiency, threshold, and Auger lifetimes for CuInSe2 compare well with other nanocrystal materials.
Book Synopsis Copper Zinc Tin Sulfide-Based Thin-Film Solar Cells by : Kentaro Ito
Download or read book Copper Zinc Tin Sulfide-Based Thin-Film Solar Cells written by Kentaro Ito and published by John Wiley & Sons. This book was released on 2015-02-23 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning with an overview and historical background of Copper Zinc Tin Sulphide (CZTS) technology, subsequent chapters cover properties of CZTS thin films, different preparation methods of CZTS thin films, a comparative study of CZTS and CIGS solar cell, computational approach, and future applications of CZTS thin film solar modules to both ground-mount and rooftop installation. The semiconducting compound (CZTS) is made up earth-abundant, low-cost and non-toxic elements, which make it an ideal candidate to replace Cu(In,Ga)Se2 (CIGS) and CdTe solar cells which face material scarcity and toxicity issues. The device performance of CZTS-based thin film solar cells has been steadily improving over the past 20 years, and they have now reached near commercial efficiency levels (10%). These achievements prove that CZTS-based solar cells have the potential to be used for large-scale deployment of photovoltaics. With contributions from leading researchers from academia and industry, many of these authors have contributed to the improvement of its efficiency, and have rich experience in preparing a variety of semiconducting thin films for solar cells.
Book Synopsis Colloidal Quantum Dot Optoelectronics and Photovoltaics by : Gerasimos Konstantatos
Download or read book Colloidal Quantum Dot Optoelectronics and Photovoltaics written by Gerasimos Konstantatos and published by Cambridge University Press. This book was released on 2013-11-07 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Capturing the most up-to-date research in colloidal quantum dot (CQD) devices, this book is written in an accessible style by the world's leading experts. The application of CQDs in solar cells, photodetectors and light-emitting diodes (LEDs) has developed rapidly over recent years, promising to transform the future of clean energy, communications, and displays. This complete guide to the field provides researchers, students and practitioners alike with everything they need to understand these developments and begin contributing to future applications. Introductory chapters summarise the fundamental physics and chemistry, whilst later chapters review the developments that have propelled the field forwards, systematically working through key device advances. The science of CQD films is explained through the latest physical models of semiconductor transport, trapping and recombination, whilst the engineering of organic and inorganic multilayered materials is shown to have enabled major advances in the brightness and efficiency of CQD LEDs.
Book Synopsis Photoelectrochemical Solar Cells by : Nurdan Demirci Sankir
Download or read book Photoelectrochemical Solar Cells written by Nurdan Demirci Sankir and published by John Wiley & Sons. This book was released on 2018-11-30 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an overall view of the photoelectrochemical systems for solar hydrogen generation, and new and novel materials for photoelectrochemical solar cell applications. The book is organized in three parts. General concepts and photoelectrochemical systems are covered in Part I. Part II is devoted to photoactive materials for solar hydrogen generation. Main focus of the last part is the photoelectrochemical related systems. This part provides a diverse information about the implementation of multi-junctional solar cells in solar fuel generation systems, dye-sensitized solar hydrogen production and photocatalytic formation of photoactive semiconductors.
Book Synopsis Materials Concepts For Solar Cells (Second Edition) by : Thomas Dittrich
Download or read book Materials Concepts For Solar Cells (Second Edition) written by Thomas Dittrich and published by World Scientific Publishing Company. This book was released on 2018-01-30 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modern challenge is for solar cell materials to enable the highest solar energy conversion efficiencies, at costs as low as possible, and at an energy balance as sustainable as necessary in the future. This textbook explains the principles, concepts and materials used in solar cells. It combines basic knowledge about solar cells and the demanded criteria for the materials with a comprehensive introduction into each of the four classes of materials for solar cells, i.e. solar cells based on crystalline silicon, epitaxial layer systems of III-V semiconductors, thin-film absorbers on foreign substrates, and nano-composite absorbers. In this sense, it bridges a gap between basic literature on the physics of solar cells and books specialized on certain types of solar cells.The last five years had several breakthroughs in photovoltaics and in the research on solar cells and solar cell materials. We consider them in this second edition. For example, the high potential of crystalline silicon with charge-selective hetero-junctions and alkaline treatments of thin-film absorbers, based on chalcopyrite, enabled new records. Research activities were boosted by the class of hybrid organic-inorganic metal halide perovskites, a promising newcomer in the field.This is essential reading for students interested in solar cells and materials for solar cells. It encourages students to solve tasks at the end of each chapter. It has been well applied for postgraduate students with background in materials science, engineering, chemistry or physics.
Book Synopsis Semiconductor Materials for Solar Photovoltaic Cells by : M. Parans Paranthaman
Download or read book Semiconductor Materials for Solar Photovoltaic Cells written by M. Parans Paranthaman and published by Springer. This book was released on 2015-09-16 with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews the current status of semiconductor materials for conversion of sunlight to electricity, and highlights advances in both basic science and manufacturing. Photovoltaic (PV) solar electric technology will be a significant contributor to world energy supplies when reliable, efficient PV power products are manufactured in large volumes at low cost. Expert chapters cover the full range of semiconductor materials for solar-to-electricity conversion, from crystalline silicon and amorphous silicon to cadmium telluride, copper indium gallium sulfide selenides, dye sensitized solar cells, organic solar cells, and environmentally friendly copper zinc tin sulfide selenides. The latest methods for synthesis and characterization of solar cell materials are described, together with techniques for measuring solar cell efficiency. Semiconductor Materials for Solar Photovoltaic Cells presents the current state of the art as well as key details about future strategies to increase the efficiency and reduce costs, with particular focus on how to reduce the gap between laboratory scale efficiency and commercial module efficiency. This book will aid materials scientists and engineers in identifying research priorities to fulfill energy needs, and will also enable researchers to understand novel semiconductor materials that are emerging in the solar market. This integrated approach also gives science and engineering students a sense of the excitement and relevance of materials science in the development of novel semiconductor materials. · Provides a comprehensive introduction to solar PV cell materials · Reviews current and future status of solar cells with respect to cost and efficiency · Covers the full range of solar cell materials, from silicon and thin films to dye sensitized and organic solar cells · Offers an in-depth account of the semiconductor material strategies and directions for further research · Features detailed tables on the world leaders in efficiency demonstrations · Edited by scientists with experience in both research and industry
Download or read book Nanoscience written by Paul O'Brien and published by Royal Society of Chemistry. This book was released on 2016-01-04 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of nanoscience continues to grow at an impressive rate, with over 10,000 new articles a year contributing to more than half a million citations. Such a vast landscape of material requires careful examination to uncover the most important discoveries. Nanoscience, edited by Professor Paul O’Brien (University of Manchester) and Dr John Thomas (Bangor University), presents a critical and comprehensive assessment of the last twelve months of research and discussion. With contributions from around the globe, this series ensures readers will be well-versed in the latest research and methodologies. Chapters cover a range of topics, including ‘Mesocrystals’, ‘Quantum dot synthesis’, ‘Nano and energy storage’ and ‘Beyond graphene’. Anyone practicing in a nano-allied field, or wishing to enter the nano-world, will benefit from the publication of this comprehensive resource annually.
Download or read book Renewable Energy written by Bent Sorensen and published by Routledge. This book was released on 2018-12-14 with total page 2216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This four-volume set, edited by a leading expert in the field, brings together in one collection a series of papers that have been fundamental to the development of renewable energy as a defined discipline. Some of the papers were first published many years ago, but they remain classics in their fields and retain their relevance to the understanding of current issues. The papers have been selected with the assistance of an eminent international editorial board. The set includes a general introduction and each volume is introduced by a new overview essay, placing the selected papers in context. The range of subject matter is considerable, including coverage of all the main renewable technologies, the fundamental principles by which they function, and the issues around their deployment such as planning, integration and socio-economic assessment. Overall, the set provides students, teachers and researchers, confronted with thousands of journal articles, book chapters and grey literature stretching back decades, with a ready-made selection of and commentary on the most important key writings in renewable energy. It will be an essential reference for libraries concerned with energy, technology and the environment.
Book Synopsis Emerging Photovoltaic Materials by : Santosh K. Kurinec
Download or read book Emerging Photovoltaic Materials written by Santosh K. Kurinec and published by John Wiley & Sons. This book was released on 2018-11-30 with total page 828 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the recent advances in photovoltaics materials and their innovative applications. Many materials science problems are encountered in understanding existing solar cells and the development of more efficient, less costly, and more stable cells. This important and timely book provides a historical overview, but concentrates primarily on the exciting developments in the last decade. It includes organic and perovskite solar cells, photovoltaics in ferroelectric materials, organic-inorganic hybrid perovskite, materials with improved photovoltaic efficiencies as well as the full range of semiconductor materials for solar-to-electricity conversion, from crystalline silicon and amorphous silicon to cadmium telluride, copper indium gallium sulfide selenides, dye sensitized solar cells, organic solar cells, and environmentally-friendly copper zinc tin sulfide selenides.
Book Synopsis Solution Processing for Copper Indium Sulfide Solar Cells by : Stephen Thacker Connor
Download or read book Solution Processing for Copper Indium Sulfide Solar Cells written by Stephen Thacker Connor and published by Stanford University. This book was released on 2011 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: In recent years, the field of photovoltaics has become increasingly important due to rising energy demand and climate change. While most solar cells are currently composed of crystalline silicon, devices with thinner films of inorganic absorber materials might allow production at a greater scale due to their lower materials cost. In particular, thin films of CuInS2 are promising solar absorber materials due to their high efficiencies and low required thicknesses. However, the fabrication of thin film solar cells currently requires expensive vacuum techniques. As an alternative, solution-based deposition techniques have been proposed as a route to low-cost and high-throughput electronic device fabrication. I have studied how film growth depends on solutuion deposited precursor film quality, with the goal of producing large grained films of CuInS2 through solution processing. In the first approach, we used solvothermal decomposition of organometallic precursors at moderate temperatures to produce nanoparticles of CuInS2. Thin films of these nanoparticles were cast onto molybdenum coated glass and further processed to create CuInS2 solar cells. We found that performance was dependent on film porosity, grain size, and stoichiometry of the nanoparticles. Films with grain sizes of ~200nm were attained, from which 1.3% efficient solar cells were made. In addition, we showed that this synthesis could be extended to produce CuInS2 nanoparticles with partial substitution of Fe, Zn, and Ga. In the second approach, we synthesized an air-stable hybrid organometallic/nanoparticle ink at room temperature in ambient conditions through a vulcanization reaction. This ink could be coated onto substrates in smooth layers, and further reactive annealing formed large grained CuInS2 films. This process was characterized, and a correlation between residual carbon and grain growth was found. Additionally, the chemical transformation between precursor layers and final sulfide thin film was analyzed, with an emphasis on the difference between sulfurization and selenization. We demonstrated that the sulfurization process was producing morphological defects due to its nucleation limited growth mechanism. However, it was modified to more closely resemble the diffusion limited selenization mechanism, thus producing flat films of CuInS2 with grain sizes of ~500nm.
Book Synopsis Nanotechnology for Photovoltaics by : Loucas Tsakalakos
Download or read book Nanotechnology for Photovoltaics written by Loucas Tsakalakos and published by CRC Press. This book was released on 2010-03-25 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current concerns regarding greenhouse gas-related environmental effects, energy security, and the rising costs of fossil fuel-based energy has renewed interest in solar energy in general and photovotaics in particular. Exploring state-of-the-art developments from a practical point of view, Nanotechnology for Photovoltaics examines issues in increas
Book Synopsis Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications by : Sampat G. Deshmukh
Download or read book Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications written by Sampat G. Deshmukh and published by Bentham Science Publishers. This book was released on 2024-07-25 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thin Film Nanomaterials: Synthesis, Properties and Innovative Energy Applications provides a comprehensive overview of the synthesis, properties, and cutting-edge applications of thin film nanomaterials. Each chapter explores different aspects of thin film synthesis and its application in energy devices, showcasing different metal-based and carbon nanomaterials . The book begins with a discussion on the synthesis and characterization of cadmium and zinc sulphide thin films for opto-electronics energy devices. Subsequent chapters delve into critical reviews of CIGS thin film nanomaterials, deposition techniques for metal oxide nanocomposite films, and nanostructured TiO2@carbon films for photocatalytic applications. Bandgap engineering, optical properties of composite films, and recent advancements in metal oxide thin films are also covered. Additionally, the synthesis and characteristics of iron oxide films for solar cell and green energy storage applications are discussed. Chapters on challenges and future prospects of CNT-based cathode emitters and advanced characterizations of nanocrystalline ferrimagnetic thin films provide valuable insights into emerging technologies. This book is an essential resource for professors, scientists, engineers, research scholars, postdocs, and undergraduate/graduate students seeking to explore the forefront of nanomaterials and their applications in energy systems.
Book Synopsis Hybrid Nanocomposites for Nanotechnology by : Lhadi Merhari
Download or read book Hybrid Nanocomposites for Nanotechnology written by Lhadi Merhari and published by Springer Science & Business Media. This book was released on 2009-03-03 with total page 840 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers the latest advances in polymer-inorganic nanocomposites, with particular focus on high-added-value applications in fields including electronics, optics, magnetism and biotechnology. The unique focus of this book is on electronic, optical, magnetic and biomedical applications of hybrid nanocomposites. Coverage includes: Synthesis methods and issues and production scale-up; Characterization methods; Electronic applications; Optical applications and Photonics; Magnetic applications; and Biomedical applications. The book offers readers a solid grasp of the state of the art, and of current challenges in non-traditional applications of hybrid nanocomposites.
Book Synopsis Nanocrystal Solar Cells by : Ilan Gur
Download or read book Nanocrystal Solar Cells written by Ilan Gur and published by . This book was released on 2006 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
