Analysis of opto-electrical, trap complexity and defect density in Cu–Zn–Ge–S/Se kesterite thin-film solar cell

A. Benisha Chris, Soumyaranjan Routray*, Yehia Massoud

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Kesterite photovoltaic have received a lot of attention for its cheap cost and high efficiency. But, their performance efficiency is less than 12%. Its performances are restricted by the formation of defects that reduce short-circuit current by creating deep traps which undergo recombination. An approach, replacing Sn with Ge as Cu–Zn–Ge–S/Se (CZGS)/(CZGSe) kesterite solar cell is investigated to reduce defect development. In this article, various loss mechanisms that impact on the performance of CZGS/Se solar cells are investigated and compared. The impact of electrical, optical and various loss strategies such as radiative and non radiative recombination is investigated in depth. Additionally, trap and defect state densities are also propagated to the absorber layer. In the presence of defect states, the efficiency of the kesterite solar cell is significantly damaged and degraded about 11%.

Original languageEnglish (US)
Article number112975
JournalOptical Materials
Volume133
DOIs
StatePublished - Nov 2022

Bibliographical note

Publisher Copyright:
© 2022 Elsevier B.V.

Keywords

  • CZGS
  • CZGSe
  • Defects
  • Kesterite
  • Quantum efficiency
  • Traps

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Spectroscopy
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry
  • Electrical and Electronic Engineering

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