Zn–Se–Cd–S Interlayer Formation at the CdS/Cu2ZnSnSe4 Thin-Film Solar Cell Interface
[1];
- 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
- Renewable Energy, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH (HZB), Berlin, Germany
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV), Las Vegas, Nevada, United States, Engineering Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland, United States
- Department of Chemistry and Biochemistry, University of Nevada, Las Vegas (UNLV), Las Vegas, Nevada, United States
- Advanced Light Source (ALS), Lawrence Berkeley National Laboratory, Berkeley, California, United States
The chemical structure of the CdS/Cu2ZnSnSe4 (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 Znterminated 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.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, Berlin (Germany)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC36-08GO28308
- OSTI ID:
- 1374462
- Alternate ID(s):
- OSTI ID: 1390772; OSTI ID: 1426731; OSTI ID: 1508318
- Report Number(s):
- NREL/JA-5J00-69109
- Journal Information:
- ACS Energy Letters, Journal Name: ACS Energy Letters Vol. 2 Journal Issue: 7; ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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