Characterization of Sulfur Bonding in CdS:O Buffer Layers for CdTe-based Thin-Film Solar Cells

被引：35

作者：

Duncan, Douglas A. ^{[1
,2
]}

Kephart, Jason M. ^{[3
]}

Horsley, Kimberly ^{[1
]}

Blum, Monika ^{[1
,4
]}

Mezher, Michelle ^{[1
]}

Weinhardt, Lothar ^{[1
,5
,6
,7
]}

Haeming, Marc ^{[1
,6
]}

Wilks, Regan G. ^{[2
]}

Hofmann, Timo ^{[1
]}

Yang, Wanli ^{[4
]}

Baer, Marcus ^{[1
,2
,8
]}

Sampath, Walajabad S. ^{[3
]}

Heske, Clemens ^{[1
,5
,6
,7
]}

机构：

[1] Univ Nevada, Dept Chem & Biochem, Las Vegas, NV 89154 USA

[2] Helmholtz Zentrum Berlin Mat & Energie GmbH, Renewable Energy, D-14109 Berlin, Germany

[3] Colorado State Univ, Dept Mech Engn, Ft Collins, CO 80523 USA

[4] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[5] Karlsruhe Inst Technol, ANKA Synchrotron Radiat Facil, D-76344 Eggenstein Leopoldshafen, Germany

[6] Karlsruhe Inst Technol, Inst Photon Sci & Synchrotron Radiat, D-76344 Eggenstein Leopoldshafen, Germany

[7] Karlsruhe Inst Technol, Inst Chem Technol & Polymer Chem, D-76128 Karlsruhe, Germany

[8] Brandenburg Tech Univ Cottbus Senftenberg, Inst Chem & Phys, D-03046 Cottbus, Germany

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 30期

关键词：

solar cells; CdS; CdTe; alternative buffer layers; XPS;

D O I：

10.1021/acsami.5b03503

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

On the basis of a combination of X-ray photoelectron spectroscopy and synchrotron-based X-ray emission spectroscopy, we present a detailed characterization of the chemical structure of CdS:O thin films that can be employed as a substitute for CdS layers in thin-film solar cells. It is possible to analyze the local chemical environment of the probed elements, in particular sulfur, hence allowing insights into the species-specific composition of the films and their surfaces. A detailed quantification of the observed sulfur environments (i.e., sulfide, sulfate, and an intermediate oxide) as a function of oxygen content is presented, allowing a deliberate optimization of CdS:O thin films for their use as alternative buffer layers in thin-film photovoltaic devices.

引用

页码：16382 / 16386

页数：5

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