DataVXACS Energy LettersPaper
journal article·2017-07-14Open access

Zn–Se–Cd–S Interlayer Formation at the CdS/Cu2ZnSnSe4 Thin-Film Solar Cell Interface

Marcus Bär, Ingrid Repins, Lothar Weinhardt, Jan-Hendrik Alsmeier, Sujitra Pookpanratana, Monika Blum, Wanli Yang, Clemens Heske, Regan G. Wilks, Rommel Noufi

ACS Energy Letters· Volume 2· Issue 7
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Source abstract

Abstract

High Resolution Image Download MS PowerPoint Slide The chemical structure of the CdS/Cu 2 ZnSnSe 4 (CZTSe) interface was studied by a combination of electron and X-ray spectroscopies with varying surface sensitivity. We find the CdS chemical bath deposition causes a “redistribution” of elements in the proximity of the CdS/CZTSe interface. In detail, our data suggest that Zn and Se from the Zn-terminated CZTSe absorber and Cd and S from the buffer layer form a Zn–Se–Cd–S interlayer. We find direct indications for the presence of Cd–S, Cd–Se, and Cd–Se–Zn bonds at the buffer/absorber interface. Thus, we propose the formation of a mixed Cd(S,Se)–(Cd,Zn)Se interlayer. We suggest the underlying chemical mechanism is an ion exchange mediated by the amine complexes present in the chemical bath.
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Research context

Materials processing

OpenAlex topics: Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties · Semiconductor materials and interfaces

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Berlin, Germany

Institut für Physik, Brandenburgische Technische Universität Cottbus-Senftenberg, Cottbus, Germany

National Renewable Energy Laboratory (NREL), Golden, Colorado, United States

Institute for Photon Science and Synchrotron Radiation (IPS), Karlsruhe Institute of Technology (KIT), Eggenstein-Leopoldshafen, Germany

Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV), Las Vegas, Nevada, United States

Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Engineering Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland, United States

Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, California, United States

Funding

Helmholtz-Gemeinschaft · Basic Energy Sciences · H2020 Energy

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