Unlinking absorption and haze in thin film silicon solar cells front electrodes

被引：28

作者：

Boccard, Mathieu ^{[1
]}

Cuony, Peter ^{[1
]}

Battaglia, Corsin ^{[1
]}

Despeisse, Matthieu ^{[1
]}

Ballif, Christophe ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Inst Microengn IMT, Photovolta & Thin Film Elect Lab, CH-2000 Neuchatel, Switzerland

来源：

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2010年 / 4卷 / 11期

关键词：

solar cells; thin film; silicon; light trapping; free carriers; ZnO; OXIDE;

D O I：

10.1002/pssr.201004303

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We study the respective influence of haze and free carrier absorption (FCA) of transparent front electrodes on the photo-generated current of micromorph thin film silicon solar cells. To decouple the haze and FCA we develop bi-layer front electrodes: a flat indium tin oxide layer assures conduction and allows us to tune FCA while the haze is adjusted by varying the thickness of a highly transparent rough ZnO layer. We show how a minimum amount of FCA leads only to a few percents absorption for a single light path but to a strong reduction of the cell current in the infrared part of the spectrum. Conversely, a current enhancement is shown with increasing front electrode haze up to a saturation of the current gain. This saturation correlates remarkably well with the haze of the front electrode calculated in silicon. This allows us to clarify the requirements for the front electrodes of micromorph cells. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

收藏

页码：326 / 328

页数：3

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