Efficient solar energy conversion with electrochemically conditioned CuInS2 thin film absorber layers

被引：19

作者：

Berenguier, B

Lewerenz, HJ

机构：

[1] Hahn Meitner Inst Berlin GmbH, Div Solar Energy, D-14109 Berlin, Germany

[2] N Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2006年 / 8卷 / 01期

关键词：

electrochemical etching; photoelectrochemical solar cell; CuInS2; X-ray photoelectron spectroscopy; corrosion;

D O I：

10.1016/j.elecom.2005.08.012

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The replacement of a toxic KCN etch step used for the preparation of efficient thin film solar cells with CuInS2 by a mixed photoelectrochemical and electrochemical anodic conditioning procedure is reported. Processing in V2+/V3+-4.4 M HCl redox electrolyte with specific potential ramps results in photoelectrochemical solar cells (PECS) superior to KCN etched cells after combination with an additional procedure employing anodic potential pulses. Solar-to-electrical conversion efficiencies of PECS yield eta = 2.4% for KCN etched samples and of 3.3% for the new two-step treatment. X-ray photoelectron spectroscopy (XPS) and solar cell analysis show removal of Cu-S phases and formation of ordered defect compounds (OVCs) on CuInS2. After electrochemical treatment the surface is less Cu-depleted than after KCN etching attributed to a non-sulfide monovalent Cu compound. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：165 / 169

页数：5

共 28 条

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