Silicon Thin-Film Solar Cells on Glass With Open-Circuit Voltages Above 620 mV Formed by Liquid-Phase Crystallization

被引：40
|
作者：
Amkreutz, Daniel [1 ]
Haschke, Jan [1 ]
Kuehnapfel, Sven [1 ]
Sonntag, Paul [1 ]
Rech, Bernd [1 ]
机构：
[1] Helmholtz Zentrum Berlin Mat & Energie GmbH, Inst Silicon Photovolta, D-12489 Berlin, Germany
来源：
IEEE JOURNAL OF PHOTOVOLTAICS | 2014年 / 4卷 / 06期
关键词：
Liquid-phase crystallization; polycrystalline silicon; single-sided contact system; surface passivation; EFFICIENCY;
D O I：
10.1109/JPHOTOV.2014.2358799
中图分类号：
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号：
0807 ; 0820 ;
摘要：
Liquid-phase crystallization (LPC) using line-shaped energy sources such as laser or electron beam has proven to be a suitable method to grow large grained high-quality silicon films onto commercially well-available glass substrates. In this study, we compare cw-diode laser-crystallized absorbers with electron beam-crystallized material using backcontacted backjunction solar cells. Furthermore, the influence of the absorber doping concentration thickness on the solar cell performance is studied. Using experimental data obtained on test structures, as well as solar cells and 1-D device simulations, an ideal dopant concentration is determined to be 2 - 6 x 10(16)cm(-3), in combination with an absorber thickness of 10-20 mu m. Finally, we present a slightly modified cell process to reduce the optical losses, which resulted in conversion efficiencies of up to 11.8%.
引用
收藏
页码：1496 / 1501
页数：6
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