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Crystalline-Silicon Solar Cells for the 21st Century - amjith - 10-04-2017 Crystalline-Silicon Solar Cells for the 21st Century [attachment=16524] ABSTRACT The worldwide market share for crystalline-silicon solar cells has increased steadily in the last 10 years. In 1998, about 87% of the photovoltaic modules shipped worldwide are based on crystalline silicon. This dominance will likely continue into at least the first few years of the 21st century. The long-term growth of crystalline-silicon solar cells will depend on the development of low-cost polysilicon feedstock, silicon films, and advanced cell and module manufacturing processes. INTRODUCTION The worldwide photovoltaic (PV) module shipments for terrestrial applications reached 152 MW/year in 1998. Crystalline-silicon (c-Si) solar cells currently account for about 87% of the worldwide PV module shipment LOW-COST POLYSILICON FEEDSTOCK For crystal-growth feedstock, the c-Si PV industry has been relying on waste material from the semiconductor Si industry and on secondary polysilicon, the excess or rejected material from electronic-grade polysilicon production. This amounts to about 10% of the polysilicon material used by the semiconductor Si industry. Porous Silicon It was discovered in 1990 that porous silicon formed on crystalline-silicon wafers using electrochemical etching exhibits photoluminescent and electroluminescent properties similar to those properties of a semiconductor with a direct energy gap (22). Porous silicon layers can be easily produced on single- or multicrystalline silicon surfaces by electrochemical or stain etching at very low cost. CONCLUSIONS AND DISCUSSION With increasing automation and economy of scale, the present generation of crystalline-silicon solar cells, including single-crystal wafers, polycrystalline wafers, ribbons, and sheets will continue to dominate the photovoltaic solar cell market for at least the first ten years of the 2lst century. The substrate areal throughputs for the leading growth processes are in the range 5-20 m2/h per growth station, and matching process line rates are in place Crystalline-Silicon Solar Cells for the 21st Century - sunil dash - 10-04-2017 to get information about the topic "crystalline silicon solar cells" full report ppt and related topic refer the page link bellow http://seminarsprojects.net/Thread-crystalline-silicon-solar-cells-for-the-21st-century http://seminarsprojects.net/Thread-crystalline-silicon-solar-cell |