Chalcogenide glass-ceramic with self-organized heterojunctions: application to photovoltaic solar cells
Univ. Rennes, CNRS, ISCR – UMR6226,
2 Univ. Rennes, CNRS, IETR – UMR6164, 35000 Rennes, France
3 Aix Marseille Université, CNRS, Université de Toulon, IM2NP UMR 7334, 13397 Marseille, France
* e-mail: email@example.com
Received in final form: 25 September 2017
Accepted: 10 January 2018
Published online: 16 March 2018
In this work, we present for the first time the concept of chalcogenide glass-ceramic for photovoltaic applications with the GeSe2–Sb2Se3–CuI system. It has been demonstrated that thin films, deposited with the sputtering technique, are amorphous and can be crystallized with appropriate heat treatment. The thin film glass-ceramic behaves as a p-type semiconductor, even if it contains p-type Cu2GeSe3 and n-type Sb2Se3. The conductivity of Sb2Se3 has been greatly improved by appropriate iodine doping. The first photovoltaic solar cells based on the association of iodine-doped Sb2Se3 and the glass-ceramic thin films give a short-circuit current density JSC of 10 mA/cm2 and an open-circuit voltage VOC of 255 mV, with a power conversion efficiency of about 0.9%.
Key words: chalcogenide / glass-ceramics / photovoltaic solar cells / heterojunction
© X. Zhang et al., published by EDP Sciences, 2018
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