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Synthesis and optical properties of ZnTe1−xOx highly mismatched alloys for intermediate band solar cells

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7 Author(s)
T. Tanaka ; Department of Electrical and Electronic Engineering, Saga University, 840-8502, Japan ; T. Mochinaga ; K. Saito ; Q. Guo
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Highly mismatched ZnTe1-xOx (ZnTeO) alloys have been grown by molecular beam epitaxy. X-ray diffraction (XRD) analyses showed that a single-phase ZnTeO layer were grown with a substitutional O composition x up to 1.34% on ZnTe(001) substrate in this experiments. Optical transitions associated with the lower (E-) and upper (E+) conduction subbands resulting from the anticrossing interaction between the localized O states and the extended conduction states of ZnTe were clearly observed, and the dependence of the energy position of these bands on the O composition was consistent with the band anticrossing model. The photovoltaic activities of solar cells using ZnTeO layers are also reported.

Published in:

Photovoltaic Specialists Conference (PVSC), 2012 38th IEEE

Date of Conference:

3-8 June 2012