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Manufacturing 100-mm-thick silicon solar cells with efficiencies greater than 20% in a pilot production line

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Reducing wafer thickness while increasing power conversion efficiency is the most effective way to reduce cost per Watt of a silicon photovoltaic module. Within the European project 20 percent efficiency on less than 100-mm-thick, industrially feasible crystalline silicon solar cells (“20plms”), we study the whole process chain for thin wafers, from wafering to module integration and life-cycle analysis. We investigate three different solar cell fabrication routes, categorized according to the temperature of the junction formation process and the wafer
doping type: p-type silicon high temperature, n-type silicon high temperature and n-type silicon low temperature. For each route,an efficiency of 19.5% or greater is achieved on wafers less than 100mm thick, with a maximum efficiency of 21.1% on an 80-mm-thick wafer. The n-type high temperature route is then transferred to a pilot production line, and a median solar cell efficiency of 20.0% is demonstrated on 100-mm-thick wafers.

Keywords high efficiency, pilot production, silicon, solar cells, thin wafers

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Informasi Detail

Judul Seri

Phys. Status Solidi

No. Panggil

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Penerbit

: WILEY-VCH Verlag GmbH & Co. KGaA., 2015

Deskripsi Fisik

Phys. Status Solidi A 212, No. 1, 13–24 (2015)

Bahasa

English

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Tipe Media

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Edisi

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Subjek

FISIKA

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