Atomic-scale distribution of impurities in CuInSe2-based thin-film solar cells

被引：41

作者：

Cojocaru-Miredin, O. ^{[1
]}

Choi, P. ^{[1
]}

Wuerz, R. ^{[2
]}

Raabe, D. ^{[1
]}

机构：

[1] Max Planck Inst Eisenforsch GmbH, D-40237 Dusseldorf, Germany

[2] Zentrum Sonnenenergie & Wasserstoff Forsch Baden, D-70565 Stuttgart, Germany

来源：

ULTRAMICROSCOPY | 2011年 / 111卷 / 06期

关键词：

Thin-film solar cells; Photovoltaic; Cu(In; Ga)Se-2; CuInSe2; Sodium diffusion; Grain boundary segregation; Pulsed laser atom probe; Transmission electron microscopy; SPECIMEN PREPARATION; POLYCRYSTALLINE CU(IN; GA)SE-2; PROBE TOMOGRAPHY; PERFORMANCE; SODIUM;

D O I：

10.1016/j.ultramic.2010.12.034

中图分类号：

TH742 [显微镜];

学科分类号：

摘要：

Atom Probe Tomography was employed to investigate the distribution of impurities, in particular sodium and oxygen, in a CuInSe2-based thin-film solar cell. It could be shown that sodium, oxygen, and silicon diffuse from the soda lime glass substrate into the CuInSe2 film and accumulate at the grain boundaries. Highly dilute concentrations of sodium and oxygen were measured in the bulk. Selenium was found to be depleted at the grain boundaries. These observations could be confirmed by complementary energy dispersive X-ray spectroscopy studies. Our results support the model proposed by Kronik et al. (1998) [1]. which explains the enhanced photovoltaic efficiency of sodium containing CuInSe2 solar cells by the passivation of selenium vacancies at grain boundaries. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：552 / 556

页数：5

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