Development of Cu2 SnS3 based solar cells by a sequential process
2016 IEEE 43rd Photovoltaic Specialists Conference (PVSC)(2016)
Abstract
Cu
2
SnS
3
is an attractive material for photovoltaic applications due to its inherent properties, and because is formed only by earth abundant elements. In this work we present the preparation of Cu
2
SnS
3
layers by a sequential process based in the DC-sputtering of metallic precursors followed by a reactive annealing. We analyze the impact of metallic composition (Cu/Sn ratio) and order (Cu/Sn or Sn/Cu), as well as thermal treatment conditions (one-step vs two-steps annealing, temperature and S partial vapor pressure). In a first optimization we report a device with 2.4% efficiency, discussing the efficiency limitations and challenges to increase this value.
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Key words
annealing,copper compounds,solar system,thin films
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