Effect of Cu content and temperature on the properties of Cu 2 ZnSnSe 4 solar cells

Sylvester Sahayaraj, Guy Brammertz, Marie Buffiere, Marc Meuris, Jef Vleugels, Jef Poortmans

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5 Citations (Scopus)

Abstract

The complexity involved in obtaining pure Kesterite Cu2ZnSnSe4 (CZTSe) thin film primarily arises due to its narrow region of stability, leading to the presence of unavoidable binary selenides of the constituent metals. This study offers an insight on the formation of Cu selenides when the amount of Cu is varied in the precursor from Cu poor to Cu rich. The amount of Cu selenides was found to decrease when the composition of CZTSe absorber approached Cu rich conditions but functional devices were not obtained. Detailed characterizations also showed that the Cu and Sn binary phases were present at the backside interface of CZTSe solar cells. However with an increase in the selenization temperature it was found that the amount of Cu selenides and other secondary phases could be drastically minimized or even eliminated leading to high efficiency devices.

Original languageEnglish
Article number70304
JournalEPJ Photovoltaics
Volume7
DOIs
Publication statusPublished - 1 Jan 2016

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Condensed Matter Physics

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