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Book Energy Research Abstracts

Download or read book Energy Research Abstracts written by and published by . This book was released on 1995 with total page 782 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Research on Defects and Transport in Amorphous Silicon based Semiconductors

Download or read book Research on Defects and Transport in Amorphous Silicon based Semiconductors written by and published by . This book was released on 1992 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the results from research on two topics: (1) the effects of light-soaking on the electron drift mobility in a-Si:H, and (2) modulated electron spin resonance measurements and their relationship to the electronic correlation energy of the D center in a-Si:H. Both of these projects were undertaken to better determine where the standard'' model for a-Si:H breaks down. The standard model is reasonably successful in accounting for the most elementary deep trapping'' aspects of electron and hole transport in a-Si:H, and it accounts adequately for the sub-band-gap optical properties. However, it is much less clear whether it provides a sufficient basis for understanding several effects which are crucial in operating solar cells: electron and hole mobilities and recombination in the presence of light-bias and space-charge. In the standard model, one would not expect significant effects on drift mobilities due to light-soaking, which would be envisioned as simply increasing the D-center density. Similarly, in the standard model one would not anticipate a significant temperature dependence to electron spin resonance, because essentially all spins are already detected. Discussions in the available literature on the evidence regarding both effects were inconclusive. The work reported here sets considerably more stringent constraints on the magnitude of the two effects.

Book Government Reports Announcements Index

Download or read book Government Reports Announcements Index written by and published by . This book was released on 1996-02 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Winter Waterfront Year round Use in Metropolitan Toronto

Download or read book Winter Waterfront Year round Use in Metropolitan Toronto written by Xenia Klinger and published by . This book was released on 1991 with total page 79 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Amorphous Silicon Research Phase I Annual Subcontract Report August 1 1994 July 31 1995

Download or read book Amorphous Silicon Research Phase I Annual Subcontract Report August 1 1994 July 31 1995 written by and published by . This book was released on 1995 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Principal objective of this R & D program is to expand, enhance and accelerate knowledge and capabilities for the development of high-performance, two-terminal multifunction hydrogenated amorphous silicon (a-Si:H) alloy modules. The near-term goal of the program is to achieve 12% stable efficiency by 1998 using the multifunction approach. The major effort of this program is to develop high efficiency component cells and incorporate them in the triple-junction structure to obtain the highest stable efficiency. The bulk of the effort was directed toward the middle and bottom cell structure. New and improved deposition regimes were investigated to obtain better cell performance. Fundamental studies to obtain better understanding of material and cell performance were undertaken.

Book Fundamental Studies of Defect Generation in Amorphous Silicon Alloys Grown by Remote Plasma enhanced Chemical vapor Deposition Remote PECVD Annual Subcontract Report 1 September 1990 31 August 1991

Download or read book Fundamental Studies of Defect Generation in Amorphous Silicon Alloys Grown by Remote Plasma enhanced Chemical vapor Deposition Remote PECVD Annual Subcontract Report 1 September 1990 31 August 1991 written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We demonstrated that the remote PECVD process can be used to deposit heavily doped n-type and p-type a-Si:H thin films. We optimized conditions for depositing undoped, near-intrinsic and heavily doped thin films of [mu]c(microcrystalline)-Si by remote PECVD. We extended the remote PECVD process to the deposition of undoped and doped a-Si, C:H and [mu]c-Si, C alloy films. We analyzed transport data for the dark conductivity in undoped and doped a-Si:H, a-Si, C:H, [mu]c-Si and [mu]c-Si, C films. We studied the properties of doped a-Si:H and [mu]c-Si in MOS capacitors using [approximately]10 [Omega]-cm p-type crystalline substrates and thermally grown Si0[sub 2] dielectric layers. We collaborated with a group at RWTH in Aachen, Germany, and studied the contributions of process induced defect states to the recombination of photogenerated electron pairs. We applied a tight-binding model to Si-Bethe lattice structures to investigate the effects of bond angle, and dihedral angle disorder. We used ab initio and empirical calculations to study non-random bonding arrangements in a-Si, O:H and doped a-Si:H films.

Book Defects and Diffusion in Semiconductors IV

Download or read book Defects and Diffusion in Semiconductors IV written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2001-11-30 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: This fourth volume in the series covering the latest results in the field includes abstracts of papers which appeared within the approximate period of mid-2000 to mid-2001. The scope of this coverage includes, in addition to traditional semiconductors, the increasingly important carbide, nitride and silicide semiconductors. Semiconducting oxides are not covered, as information on these can be found in the "Defects and Diffusion in Ceramics Retrospective" series. The increasing interest in ceramic-type semiconductors is again reflected by the invited papers, which include an extensive review of the particular problems involved in growing GaN films on sapphire substrates. Nevertheless, established semiconductors continue to spring surprises and to offer new problems and these are also addressed here by a number of further detailed reviews of work on Si, InP and InGaP. Finally, new results are to be found here concerning diffusive processes and defect behaviour in Ge, GeSi, InGaAs, Si and ZnSe. Altogether, these 8 long reviews, 9 research papers and 752 selected abstracts provide an invaluable and up-to-date insight into current and future trends in semiconductor theory, processing and applications.

Book Amorphous Silicon Research Annual Subcontract Report October 1 1994 September 30 1995

Download or read book Amorphous Silicon Research Annual Subcontract Report October 1 1994 September 30 1995 written by and published by . This book was released on 1996 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major effort in this program is to develop cost-effective processes which satisfy efficiency, yield, and material usage criteria for mass production of amorphous silicon-based multijunction modules. New and improved processes were developed for the component cells and a more robust rear contact was developed for better long term stability.

Book Amorphous Silicon Research

Download or read book Amorphous Silicon Research written by S. Guha and published by . This book was released on 1995 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Defects and Diffusion in Semiconductors an Annual Retrospective VIII

Download or read book Defects and Diffusion in Semiconductors an Annual Retrospective VIII written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2005-10-01 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt: This eighth volume in the series covering the latest results in the field includes abstracts of papers which appeared between the publication of Annual Retrospective VII (Volumes 230-232) and the end of 2005 (allowing for vagaries of journal availability).

Book Defects and Diffusion in Semiconductors An Annual Retrospective IX

Download or read book Defects and Diffusion in Semiconductors An Annual Retrospective IX written by David J. Fisher and published by Trans Tech Publications Ltd. This book was released on 2007-01-15 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This ninth volume in the series covering the latest results in the field includes abstracts of papers which appeared between the publication of Annual Retrospective VIII (Volumes 245-246) and the end of January 2007 (journal availability permitting).