Influence of Grain Boundaries on Recombination in Polysilicon Pn-junction Solar Cells PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Influence of Grain Boundaries on Recombination in Polysilicon Pn-junction Solar Cells PDF full book. Access full book title Influence of Grain Boundaries on Recombination in Polysilicon Pn-junction Solar Cells by . Download full books in PDF and EPUB format.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The physics controlling recombination in polysilicon pn-junction cells is described. Analytic models characterizing this recombination, whose parameters can be related directly to experiment, are developed. The analysis reveals that, in general, the description of intra-grain and grain-boundary recombination in a polysilicon solar cell requires the solution of a nonlinear, three-dimensional boundary-value problem. Cases of practical interest for which this problem is tractable are discussed. The analysis predicts an exp(qV/2kT) dependence (the reciprocal slope factor is exactly two) for carrier recombination at a grain boundary within the junction space-charge region of a non-illuminated, forward-biased cell. This result, and others of the analysis, are shown to be consistent with measured current-voltage characteristics of pn junctions fabricated on polycrystalline silicon.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
The physics controlling recombination in polysilicon pn-junction cells is described. Analytic models characterizing this recombination, whose parameters can be related directly to experiment, are developed. The analysis reveals that, in general, the description of intra-grain and grain-boundary recombination in a polysilicon solar cell requires the solution of a nonlinear, three-dimensional boundary-value problem. Cases of practical interest for which this problem is tractable are discussed. The analysis predicts an exp(qV/2kT) dependence (the reciprocal slope factor is exactly two) for carrier recombination at a grain boundary within the junction space-charge region of a non-illuminated, forward-biased cell. This result, and others of the analysis, are shown to be consistent with measured current-voltage characteristics of pn junctions fabricated on polycrystalline silicon.
Author: Publisher: ISBN: Category : Languages : en Pages :
Book Description
Solar cells fabricated on polycrystalline silicon, either bulk or thin-film, can potentially be cost-effective when used in terrestrial photovoltaic energy-conversion systems. To achieve this goal, the polysilicon cell efficiency must be increased considerably from its present values. A severe limitation to the cell efficiency is due to the grain boundaries and their influence on carrier recombination. To remove this limitation, an understanding of the fundamental physics underlying the effects of the grain boundaries on cell performance is helpful. This fundamental physics is discussed, and models are developed for recombination currents in polysilicon pn-junction solar cells. Several analytic approximations, suggested by physical insight, are used and checked ultimately for self-consistency with the results of the analysis. The models are defined such that their parameters can be related directly to measurements, and the models are hence useful in interpreting experimental results. They also can be used to study, in a systematic way, cell-design modifications to improve the efficiency, e.g., grain-boundary passivation techniques.
Author: W.H. Bloss Publisher: Springer Science & Business Media ISBN: 9400978987 Category : Technology & Engineering Languages : en Pages : 1126
Book Description
This paper is written in the belief that people are important and that equipment is to serve the needs of the people and therefore should be designed to meet their specific needs and environment. This is particularly important in the case of a developing country when a professional engineer accepts the responsibility to formulate policies evaluate equipment imple ment projects and train national people. 1. Government, geography and climate Papua New Guinea, an independent and self governing state since 1975, is located directly North of Australia above the North Eastern State of Queensland. The country extends from 141° east longitude, at the border with Indonesia (Irian Jaya) to 160° east longitude and between latitudes 1° and 12° south (see figure 1). Papua New Guinea is a parliamentary democracy, with a single legis lature known as the National Parliament (1). The State is divided into 19 provinces plus the National Capital District (Port Moresby) with de centralized Government established in each province. Before independence the country comprised the Australian territory of Papua in the southern regions and the United Nations Trust Territory of New Guinea in the North (1). Land area is 462,840 square kilometres This inclUdes the mainland, the three large islands of New Britain, ~ew Ireland and fiougainville plus 600 small islands and archipelagos. Approximate direct distances from the capital city of Port Moresby to some of the other centres are : Vanimo 990 km, Rabaul SOO km, Arawa 990 km and Lorengau S25 km.
Author: Bent Sorensen Publisher: Routledge ISBN: 1317740939 Category : Business & Economics Languages : en Pages : 2318
Book Description
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.
Author: 
Author: 
Author: 
Author: 
Author: 
Author: 
Author: W.H. Bloss
Author: M. J. Phillips
Author: 
Author: 
Author: Bent Sorensen