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Growth And Characterization Of Zinc Oxide Thin Films For Light Emitting Diodes
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Book Synopsis Growth and Characterization of Zinc Oxide Thin Films for Light Emitting Diodes by : Hyun-Sik Kim
Download or read book Growth and Characterization of Zinc Oxide Thin Films for Light Emitting Diodes written by Hyun-Sik Kim and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ZnO-based light emitting diodes were fabricated on c-plane sapphire using ZnO:P/ Zn[subscript 0.9]Mg[subscript 0.1]O/ZnO/ Zn[subscript 0.9]Mg[subscript 0.1]O/ZnO:Ga p-i-n heterostructures. The p-i-n heterojunction diodes are rectifying and show light emission under forward bias. The electroluminescence spectra shows deep level emission at low bias, but near band edge ultraviolet emission at high voltage bias. A decrease in leakage currents in as-fabricated structures was achieved via low temperature oxygen annealing.
Book Synopsis Processing and Characterization of P-Type Doped Zinc Oxide Thin Films by : Michelle Anne Myers
Download or read book Processing and Characterization of P-Type Doped Zinc Oxide Thin Films written by Michelle Anne Myers and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of zinc oxide (ZnO) for optoelectronic devices, including light emitting diodes, semiconductor lasers, and solar cells have not yet been realized due to the lack of high-quality p-type ZnO. In the research presented herein, pulsed laser deposition is employed to grow Ag-doped ZnO thin films, which are characterized in an attempt to understand the ability of Ag to act as a p-type dopant. By correlating the effects of the substrate temperature, oxygen pressure, and laser energy on the electrical and microstructural properties of Ag-doped ZnO films grown on c-cut sapphire substrates, p-type conductivity is achieved under elevated substrate temperatures. Characteristic stacking fault features have been continuously observed by transmission electron microscopy in all of the p-type films. Photoluminescence studies on n-type and p-type Ag-doped ZnO thin films demonstrate the role of stacking faults in determining the conductivity of the films. Exciton emission attributed to basal plane stacking faults suggests that the acceptor impurities are localized nearby the stacking faults in the n-type films. The photoluminescence investigation provides a correlation between microstructural characteristics and electrical properties of Ag- doped ZnO thin films; a link that enables further understanding of the doping nature of Ag impurities in ZnO. Under optimized deposition conditions, various substrates are investigated as potential candidates for ZnO thin film growth, including r -cut sapphire, quartz, and amorphous glass. Electrical results indicated that despite narrow conditions for obtaining p-type conductivity at a given substrate temperature, flexibility in substrate choice enables improved electrical properties. In parallel, N+-ion implantation at elevated temperatures is explored as an alternative approach to achieve p-type ZnO. The ion implantation fluence and temperature have been optimized to achieve p-type conductivity. Transmission electron microscopy reveals that characteristic stacking fault features are present throughout the p-type films, however in n-type N-doped films high-density defect clusters are observed. These results suggest that the temperature under which ion implantation is performed plays a critical role in determining the amount of dynamic defect re- combination that can take place, as well as defect cluster formation processes. Ion implantation at elevated temperatures is shown to be an effective method to introduce increased concentrations of p-type N dopants while reducing the amount of stable post-implantation disorder. Finally, the fabrication and properties of p-type Ag-doped ZnO/n-type ZnO and p-type N-doped ZnO/n-type ZnO thin film junctions were reported. For the N-doped sample, a rectifying behavior was observed in the I-V curve, consistent with N-doped ZnO being p-type and forming a p-n junction. The turn-on voltage of the device was -2.3 V under forward bias. The Ag-doped samples did not result in rectifying behavior as a result of conversion of the p-type layer to n-type behavior under the n- type layer deposition conditions. The systematic studies in this dissertation provide possible routes to grow p-type Ag-doped ZnO films and in-situ thermal activation of N-implanted dopant ions, to overcome the growth temperature limits, and to push one step closer to the future integration of ZnO-based devices. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/149354
Book Synopsis Zinc Oxide Bulk, Thin Films and Nanostructures by : Chennupati Jagadish
Download or read book Zinc Oxide Bulk, Thin Films and Nanostructures written by Chennupati Jagadish and published by Elsevier. This book was released on 2011-10-10 with total page 600 pages. Available in PDF, EPUB and Kindle. Book excerpt: With an in-depth exploration of the following topics, this book covers the broad uses of zinc oxide within the fields of materials science and engineering: - Recent advances in bulk , thin film and nanowire growth of ZnO (including MBE, MOCVD and PLD), - The characterization of the resulting material (including the related ternary systems ZgMgO and ZnCdO), - Improvements in device processing modules (including ion implantation for doping and isolation ,Ohmic and Schottky contacts , wet and dry etching), - The role of impurities and defects on materials properties - Applications of ZnO in UV light emitters/detectors, gas, biological and chemical-sensing, transparent electronics, spintronics and thin film
Download or read book ZnO Thin Films written by Paolo Mele and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Book Synopsis Characterization and Process Development of Zinc Oxide-based Light-emitting Diodes by : Jau-Jiun Chen
Download or read book Characterization and Process Development of Zinc Oxide-based Light-emitting Diodes written by Jau-Jiun Chen and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: ZnO-based materials have great potential for UV light-emitting diodes (LEDs) and transparent electronics because of the high exciton binding energy of ZnO relative to GaN. Fabricating an effective LED from novel materials requires a detailed knowledge of the band offset, etch, and contact behavior of the material. This work determined the valence and conduction band offsets for Zn095Cd0.05O/ZnO (0.17 eV, 0.30 eV) and related materials using x-ray photoelectron spectroscopy (XPS) and photoluminescence (PL). These methods were also used to study carrier confinement in two promising passivation materials: MgO/GaN (1.06 eV, 3.30 eV) and Sc2O3/GaN (0.42 eV, 2.14 eV). To form an LED mesa, it is critical to understand the etch rate of ZnO-based materials. In this work, HCl and H3PO4 were used as etchants for ZnCdO/ZnO (~50 nm·1-min−1 HCl/~15 nm·min−1 H3PO4) and ZnMgO/ZnO (300-1100 nm·min−1 HCl/120-300 nm·min−1H3PO4). A high degree of selectivity was sought using these etchants on ZnCdO/ZnO (~50 HCl/~15 H3PO4) and ZnMgO/ZnO (~300-400 HCl/~25 H3PO4). Alloyed Ti/Au and Ti/Al/Pt/Au contacts were deposited on n-type Zn095Cd0.05O, with excellent contact resistivities of and 2.3x10−4 and 1.6x10−4 ohm-cm2, respectively. Alloyed Ti/Au and indium-tin-oxide (ITO)/Ti/Au metallization of n-type Al-doped ZnO was used to create ohmic metal contacts with excellent contact resistivities of 6x10−8 and 4.6x10−6ohm-cm2. Using SiLENSe Software, the optimum active layer thickness was found to be 200 nm.
Book Synopsis MOCVD Growth and Characterization of N-type Zinc Oxide Thin Films by : Tammy Ben-Yaacov
Download or read book MOCVD Growth and Characterization of N-type Zinc Oxide Thin Films written by Tammy Ben-Yaacov and published by . This book was released on 2010 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: In summary, this thesis describes the growth of ZnO(0001) films by MOCVD, the progress in developing ZnO material with excellent surface morphology, high crystal quality, and controllable n-type doping, as well as its application to GaN-based optoelectronic devices as a p-contact material.
Book Synopsis Handbook of Zinc Oxide and Related Materials by : Zhe Chuan Feng
Download or read book Handbook of Zinc Oxide and Related Materials written by Zhe Chuan Feng and published by CRC Press. This book was released on 2012-09-26 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through their application in energy-efficient and environmentally friendly devices, zinc oxide (ZnO) and related classes of wide gap semiconductors, including GaN and SiC, are revolutionizing numerous areas, from lighting, energy conversion, photovoltaics, and communications to biotechnology, imaging, and medicine. With an emphasis on engineering a
Book Synopsis Zinc Oxide - A Material for Micro- and Optoelectronic Applications by : Norbert H. Nickel
Download or read book Zinc Oxide - A Material for Micro- and Optoelectronic Applications written by Norbert H. Nickel and published by Springer Science & Business Media. This book was released on 2005-12-28 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recently, a significant effort has been devoted to the investigation of ZnO as a suitable semiconductor for UV light-emitting diodes, lasers, and detectors and hetero-substrates for GaN. Research is driven not only by the technological requirements of state-of-the-art applications but also by the lack of a fundamental understanding of growth processes, the role of intrinsic defects and dopants, and the properties of hydrogen. The NATO Advanced Research Workshop on “Zinc oxide as a material for micro- and optoelectronic applications”, held from June 23 to June 25 2004 in St. Petersburg, Russia, was organized accordingly and started with the growth of ZnO. A variety of growth methods for bulk and layer growth were discussed. These techniques comprised growth methods such as closed space vapor transport (CSVT), metal-organic chemical vapor deposition, reactive ion sputtering, and pulsed laser deposition. From a structural point of view using these growth techniques ZnO can be fabricated ranging from single crystalline bulk material to polycrystalline ZnO and nanowhiskers. A major aspect of the ZnO growth is doping. n-type doping is relatively easy to accomplish with elements such al Al or Ga. At room temperature single crystal ZnO exhibits a resistivity of about 0. 3 -cm, an electron mobility of 2 17 -3 225 cm /Vs, and a carrier concentration of 10 cm . In n-type ZnO two shallow donors are observable with activation energies of 30 – 40 meV and 60 – 70 meV.
Author :Sanders, Brian Wayne Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780315762718 Total Pages :181 pages Book Rating :4.7/5 (627 download)
Book Synopsis Growth and Characterization of Electrodeposited Zinc Sulphide and Chemical Vapour Atomic Layer Deposited Zinc Oxide, Sulphide, and Oxysulphide Thin Films [microform] by : Sanders, Brian Wayne
Download or read book Growth and Characterization of Electrodeposited Zinc Sulphide and Chemical Vapour Atomic Layer Deposited Zinc Oxide, Sulphide, and Oxysulphide Thin Films [microform] written by Sanders, Brian Wayne and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 1991 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Les Enfants d'Edouard written by and published by . This book was released on 1909 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth and Characterization of Heteroepitaxial Zinc Oxide Thin Films by Organometallic Vapor Phase Epitaxy by : Pierre Souletie
Download or read book Growth and Characterization of Heteroepitaxial Zinc Oxide Thin Films by Organometallic Vapor Phase Epitaxy written by Pierre Souletie and published by . This book was released on 1987 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Epitaxial Growth and Characterization of Zn(Mg)O Thin Films by : Thomas Andreas Wassner
Download or read book Epitaxial Growth and Characterization of Zn(Mg)O Thin Films written by Thomas Andreas Wassner and published by . This book was released on 2012 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nanostructured Zinc Oxide by : Kamlendra Awasthi
Download or read book Nanostructured Zinc Oxide written by Kamlendra Awasthi and published by Elsevier. This book was released on 2021-08-10 with total page 781 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanostructured Zinc Oxide covers the various routes for the synthesis of different types of nanostructured zinc oxide including; 1D (nanorods, nanowires etc.), 2D and 3D (nanosheets, nanoparticles, nanospheres etc.). This comprehensive overview provides readers with a clear understanding of the various parameters controlling morphologies. The book also reviews key properties of ZnO including optical, electronic, thermal, piezoelectric and surface properties and techniques in order to tailor key properties. There is a large emphasis in the book on ZnO nanostructures and their role in optoelectronics. ZnO is very interesting and widely investigated material for a number of applications. This book presents up-to-date information about the ZnO nanostructures-based applications such as gas sensing, pH sensing, photocatalysis, antibacterial activity, drug delivery, and electrodes for optoelectronics. Reviews methods to synthesize, tailor, and characterize 1D, 2D, and 3D zinc oxide nanostructured materials Discusses key properties of zinc oxide nanostructured materials including optical, electronic, thermal, piezoelectric, and surface properties Addresses most relevant zinc oxide applications in optoelectronics such as light-emitting diodes, solar cells, and sensors
Book Synopsis Handbook of Zinc Oxide and Related Materials by : Zhe Chuan Feng
Download or read book Handbook of Zinc Oxide and Related Materials written by Zhe Chuan Feng and published by CRC Press. This book was released on 2012-09-26 with total page 449 pages. Available in PDF, EPUB and Kindle. Book excerpt: Through their application in energy-efficient and environmentally friendly devices, zinc oxide (ZnO) and related classes of wide gap semiconductors, including GaN and SiC, are revolutionizing numerous areas, from lighting, energy conversion, photovoltaics, and communications to biotechnology, imaging, and medicine. With an emphasis on engineering and materials science, Handbook of Zinc Oxide and Related Materials provides a comprehensive, up-to-date review of various technological aspects of ZnO. Volume One presents fundamental knowledge on ZnO-based materials and technologies. It covers the basic physics and chemistry of ZnO and related compound semiconductors and alloys. The first part of this volume discusses preparation methods, modeling, and doping strategies. It then describes epitaxial methods used to create thin films and functional materials. The book concludes with a review of alloys and related materials, exploring their preparation, bulk properties, and applications. Covering key properties and important technologies of ZnO-based devices and nano-engineering, the handbook highlights the potential of this wide gap semiconductor. It also illustrates the remaining challenging issues in nanomaterial preparation and device fabrication for R&D in the twenty-first century.
Book Synopsis Metal-organic Chemical Vapor Deposition of Indium Oxide Based Transparent Conducting Oxide Thin Films by : Jun Ni
Download or read book Metal-organic Chemical Vapor Deposition of Indium Oxide Based Transparent Conducting Oxide Thin Films written by Jun Ni and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Four novel diamine adducts of bis(hexafluoroacetylacetonato)zinc [Zn(hfa)2·(diamine)] can be synthesized in a single step reaction. Single crystal x-ray diffraction studies reveal monomeric, six-coordinate structures. The thermal stabilities and vapor phase transport properties of these complexes are considerably greater than those of conventional solid/liquid zinc metal-organic chemical vapor deposition (MOCVD) precursors. Of the four complexes, bis(1,1,1,5,5,5-hexafluoro-2,4-pentadionato)(N,N '-diethylethylenediamine)zinc [Zn(hfa)2 ( N,N'-DEA)], is particularly effective in the growth of thin films of the transparent conducting oxide Zn- and Sn-doped In2O3 (ZITO) due to its superior volatility and low melting point of 64°C.
Book Synopsis Proceedings of the 4th International Symposium on Materials and Sustainable Development by : Abdelbaki Benmounah
Download or read book Proceedings of the 4th International Symposium on Materials and Sustainable Development written by Abdelbaki Benmounah and published by Springer Nature. This book was released on 2020-10-24 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the proceedings of the 4th International Symposium on Materials and Sustainable Development ISMSD2019 (CIMDD2019), will include a 3-day Conference (12 - 14 November). Organized by the Research Unit: Materials, Processes and Environment and M'hamed Bougara University of Boumerdes (Algeria) in partnership with University of Reims - Champagne-Ardenne (France), this symposium follows the success of CIMDD 2013-2015-2017 and continues the traditions of the highly successful series of International Conferences on the materials, processes and Environment. The Symposium will provide a unique topical forum to share the latest results of the materials and sustainable development research in Algeria and worldwide.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 602 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
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