Junction formation of CuInSe2 with CdS:: A comparative study of "dry" and "wet" interfaces

被引：21
作者：
Hunger, R.
Lebedev, M. V.
Sakurai, K.
Schulmeyer, T.
Mayer, Th.
Klein, A.
Niki, S.
Jaegermann, W.
机构：
[1] Tech Univ Darmstadt, Inst Mat Sci, D-64287 Darmstadt, Germany
[2] Russian Acad Sci, Ioffe Physicochem Inst, St Petersburg 194021, Russia
[3] AIST, Res Ctr Photovoltaics, Tsukuba, Ibaraki 3058568, Japan
来源：
THIN SOLID FILMS | 2007年 / 515卷 / 15期
关键词：
CuInSe2; solar cell; heterojunction; band alignment; surface photovoltage; synchrotron X-ray photoelectron spectroscopy; surface inversion;
D O I：
10.1016/j.tsf.2006.12.120
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The junction formation of polycrystalline CuInSe2 absorbers (CIS) with thermally evaporated CdS was investigated by high-resolution synchrotron X-ray photoelectron spectroscopy. The chemistry and electronics of the interfaces of Cd partial electrolyte treated CIS ('' wet '' processed) and clean, decapped CIS ('' dry '' processed) were compared. A valence band offset of 0.96(10) eV was determined in both cases. The Cd (Se,OH) surface layer induced by the wet Cd partial electrolyte process does not significantly modify the band alignment at the CIS/CdS heterointerface from the '' dry '', vacuum-processed CIS/CdS interface. During the stepwise interface formation the energy converting capability of the CIS/CdS heterojunction was assessed by in situ surface photovoltage measurements at room temperature. The evolution of the surface photovoltage significantly differs for the '' wet '' and the '' dry '' interfaces and is discussed in relation to the function in solar cell devices. (C) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：6112 / 6118
页数：7
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