High-resolution mapping of nonuniform carrier transport at contacts to polycrystalline CdTe/CdS solar cells

被引：23

作者：

Sutter, P ^{[1
]}

Sutter, E ^{[1
]}

Ohno, TR ^{[1
]}

机构：

[1] Colorado Sch Mines, Dept Phys, Golden, CO 80401 USA

来源：

APPLIED PHYSICS LETTERS | 2004年 / 84卷 / 12期

关键词：

D O I：

10.1063/1.1688997

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We demonstrate a spectroscopic technique based on scanning tunneling microscopy that provides high-resolution maps of local carrier transport across contacts to polycrystalline thin-film solar cells. Using this technique, preferential transport channels across a p(+)-ZnTe/p-CdTe back contact of a p-CdTe/n-CdS solar cell are imaged with 20 nm spatial resolution. Transport across this contact is highly nonuniform. Large areas of high resistance coexist with nanoscale low-resistance regions that are strongly correlated with grain boundaries in the CdTe absorber. These results suggest an important role of grain boundaries as near-contact conducting channels. (C) 2004 American Institute of Physics.

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页码：2100 / 2102

页数：3

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