Abstract
An off-stoichiometric but single phase Cu1.95Zn1.1Sn0.96Se4 kesterite powder was investigated by temperature dependent transient surface photovoltage (SPV) spectroscopy. SPV signals excited at different wavelengths were transformed into SPV spectra that depended on the response time of measurement. Shallow electronic states and states with transition energies at 0.83 eV or 0.78… 0.9 eV were distinguished. The temperature dependence of the band gap of Cu1.95Zn1.1Sn0.96Se4 was obtained. Results were discussed on the basis of defects in Cu-poor and Zn-rich kesterite.
Highlights
View Table of Contents: http://aip.scitation.org/toc/apl/110/2 Published by the American Institute of Physics
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Summary
Articles you may be interested in Optical properties of Cu2ZnSn(SxSe1-x)[4] solar absorbers: Spectroscopic ellipsometry and ab initio calculations Appl.
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