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ISBN 13 :
Total Pages : 146 pages
Book Rating : 4.:/5 (14 download)
Download or read book Thermally Induced Degradation of Gallium Arsenide Multi-Junction Solar Cells written by and published by . This book was released on 2001 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : B. E. Anspaugh
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ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (362 download)
Download or read book GaAs Solar Cell Radiation Handbook written by B. E. Anspaugh and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : William Robert Mateker
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (944 download)
Download or read book Understanding Degradation Mechanisms and Improving Long-term Performance of Organic Solar Cells written by William Robert Mateker and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic photovoltaics (OPVs) attract interest because they can be printed rapidly and at low cost. Over the past decade, research directed towards increasing the initial power conversion efficiency has pushed the record device efficiency above 10%. However, in order to be a competitive technology, the performance must remain relatively stable over time. In this talk, I discuss mechanisms of degradation in materials and solar cells as well as suggest materials properties that will improve stability. First I discuss the bleaching of the absorber materials in air. I will show that dense, ordered film morphologies can stabilize materials -- in one case, by a factor of 2000. Next, I show that temperature induced degradation can occur in well-encapsulated solar cells when the materials have glass transition temperatures at or below operating conditions. Similarly, I discuss the effect of mobile molecules present in the films and show that purification aimed at reducing their content can improve thermal stability. In a solar cell made from a polymer with a high glass transition temperature, lifetimes can exceed 20 years. Finally, I discuss the light-induced degradation that occurs in the first several hundred hours of solar cell operation, even in the absence of oxygen. This degradation can reduce the short circuit current via a fullerene dimerization reaction, or it can reduce the open circuit voltage via the introduction of energetic disorder on the semiconducting polymer. I show that both degradation modes are reduced in films with a more ordered morphology. These findings provide guidelines for reducing thermal and photo-induced degradation and improving the long-term stability of OPVs.
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ISBN 13 :
Total Pages : 994 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Tommy L. Fifer
Publisher :
ISBN 13 : 9781423524540
Total Pages : 90 pages
Book Rating : 4.5/5 (245 download)
Download or read book Radiation Effects on Multi-Junction Solar Cells written by Tommy L. Fifer and published by . This book was released on 2001-12-01 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: The GaInP2/GaAs/Ge monolithic high efficiency triple junction cell is the state of the art multijunction solar cell for space applications. Numerous labs have undertaken investigation into the stability of GaInP2/GaAs/Ge in response to electron radiation. Electron radiation experiments have shown that the degradation of GaInP2/GaAs/Ge solar cells is mainly caused by a decrease of the short circuit current (Isc). The investigation and interpretation of the damage mechanism from electron irradiation in Spectrolab's GaInP2/GaAs/Ge triple junction cell is the purpose of this thesis. Current voltage characteristics were measured to establish beginning of life (BOL) parameters of the solar cells and the changes that occur due to irradiation (EOL).
Author : Edward M. Gaddy
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (11 download)
Download or read book Relative Cost Effectiveness of Multi-junction, Gallium Arsenide and Silicon Solar Cells written by Edward M. Gaddy and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 606 pages
Book Rating : 4.3/5 (91 download)
Download or read book Solar Energy Update written by and published by . This book was released on 1982 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael Allan Purcell
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ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (297 download)
Download or read book Degradation Studies of N-type Gallium Arsenide Electrodes in Liquid Junction Solar Cells written by Michael Allan Purcell and published by . This book was released on 1982 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 934 pages
Book Rating : 4.F/5 ( download)
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 934 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (3 download)
Download or read book SERI Photovoltaic Advanced Research and Development Bibliography, 1982-1985 written by and published by . This book was released on 1986 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 181 pages
Book Rating : 4.:/5 (227 download)
Download or read book Analysis of Radiation Damaged and Annealed Gallium Arsenide and Indium Phosphide Solar Cells Using Deep Level Transient Spectroscopy Techniques written by and published by . This book was released on 1991 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: Degradation of solar cell performance from radiation damage was found to be reversed through annealing processes. The mechanisms behind the degradation and recovery is based on deep-level traps, or defects, in the lattice structure of the solar cell. Through a process known as Deep Level Transient Spectroscopy (DLTS), a correlation can be made between damage/recovery and trap energy level/concentration of the cell. Gallium Arsenide (GaAs) and Indium Phosphide (InP) solar cells were subjected to 1 MeV electron irradiation by a Dynamitron linear acceleration at two fluence levels of 1E14 and 1E15 electrons/sq cm. The process of annealing included thermal annealing at 90 C with forward bias current and thermal annealing alone (for GaAs). After each cycle, DLTS measurements were taken to determine the energy level of the traps and their concentration. Multiple cycles of irradiation, annealing and DLTS were performed to observe the correlation between degradation and recovery to trap energy level and concentration. The results show that the lower energy level traps are associated with the recovery of the cells while the higher level traps are associated with the overall permanent degradation of the cells.
Author : Axel Herguth
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (15 download)
Download or read book Temperature Induced Degradation of the Contact Resistance of Ag-screen Printed P-type Silicon Solar Cells written by Axel Herguth and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 858 pages
Book Rating : 4.3/5 (91 download)
Download or read book Energy Information Abstracts written by and published by . This book was released on 1991 with total page 858 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Antonio Luque
Publisher : John Wiley & Sons
ISBN 13 : 0470721693
Total Pages : 1172 pages
Book Rating : 4.4/5 (77 download)
Download or read book Handbook of Photovoltaic Science and Engineering written by Antonio Luque and published by John Wiley & Sons. This book was released on 2011-01-31 with total page 1172 pages. Available in PDF, EPUB and Kindle. Book excerpt: The most comprehensive, authoritative and widely cited reference on photovoltaic solar energy Fully revised and updated, the Handbook of Photovoltaic Science and Engineering, Second Edition incorporates the substantial technological advances and research developments in photovoltaics since its previous release. All topics relating to the photovoltaic (PV) industry are discussed with contributions by distinguished international experts in the field. Significant new coverage includes: three completely new chapters and six chapters with new authors device structures, processing, and manufacturing options for the three major thin film PV technologies high performance approaches for multijunction, concentrator, and space applications new types of organic polymer and dye-sensitized solar cells economic analysis of various policy options to stimulate PV growth including effect of public and private investment Detailed treatment covers: scientific basis of the photovoltaic effect and solar cell operation the production of solar silicon and of silicon-based solar cells and modules how choice of semiconductor materials and their production influence costs and performance making measurements on solar cells and modules and how to relate results under standardised test conditions to real outdoor performance photovoltaic system installation and operation of components such as inverters and batteries. architectural applications of building-integrated PV Each chapter is structured to be partially accessible to beginners while providing detailed information of the physics and technology for experts. Encompassing a review of past work and the fundamentals in solar electric science, this is a leading reference and invaluable resource for all practitioners, consultants, researchers and students in the PV industry.
Author : Richard Dillon Kramer
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (64 download)
Download or read book Annealing of Radiation Damaged Gallium Arsenide Solar Cells by Laser Illumination written by Richard Dillon Kramer and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this research, preliminary results of a new approach for annealing previously irradiated Gallium Arsenide solar cells is reported. This technique examines the use of laser illumination to induce Forward-Biased current annealing. Five GaAs solar cells were irradiated with 65 MeV electrons at varying fluence levels. Visible laser light produced a 0.5 A/sq cm forward-biased current density and raised the solar cell temperature by 30 deg C. Ten to fifteen percent recovery of degraded parameters was achieved in four of the five tested cells. The results show that a laser can produce some annealing in radiation damaged GaAs solar cells. Further investigation into the results also indicate that the 65 MeV energy level of the electron irradiation could have caused unrecoverable permanent damage to the solar cells. Follow up research of this annealing technique should be conducted on GaAs cells that are being irradiated at a lower energy level as well as lower fluence level. Repetitive annealing of lightly damaged cells in previous research has provided appreciative recovery using forward bias current techniques. One can expect similar results using the laser induced annealing technique proposed in this research.
Author : Joseph A. Bruening
Publisher :
ISBN 13 :
Total Pages : 126 pages
Book Rating : 4.:/5 (227 download)
Download or read book Analysis of Radiation Damaged and Annealed Gallium Arsenide and Indium Phosphide Solar Cells Using Deep Level Transient Spectroscopy written by Joseph A. Bruening and published by . This book was released on 1993 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power loss in spacecraft solar cells due to radiation damage was investigated. The mechanisms behind the degradation and based on deep-level defects in the crystalline lattice structure of the solar cell. Through a process known as Deep Transient Spectroscopy (DLTS), a correlation can be made between damage/recovery and trap energy of the cell. Gallium (GaAs/Ge) and Indium Phosphide (InP) solar cells were subjected to 1 MeV electron irradiation, to fluences of 1E16 electrons/sq cm. Attempts at recovery included thermal annealing, alone, and with an applied forward bias current, and injection annealing. Various cycles of irradiation, annealing and DLTS were performed, in an attempt to correlate damage to trap energy level and growth. The results show that DLTS cannot be performed on GaAs/Ge, and no recovery was apparent in these cells. DLTS analysis of InP indicated excellent photoinjection annealing recovery at a variety of temperatures. Lower energy level defects are associated with the recovery of the cells while the higher energy traps are indicative of permanent degradation in the Inp solar cells. Applying this information to future research could increase satellite mission life, and significantly reduce space mission costs. Radiation damage in solar cells, DLTS, Annealing, Heterojunction, Gallium arsenide, Indium phosphide.
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ISBN 13 :
Total Pages : 722 pages
Book Rating : 4.3/5 (91 download)
Download or read book Technology for Large Space Systems written by and published by . This book was released on 1966 with total page 722 pages. Available in PDF, EPUB and Kindle. Book excerpt:
