Control of metal salt ratio and MoS2 layer thickness in a Cu2ZnSnS4 thin film solar cell

Dongwan Seo, Changheon Kim, Eunseok Oh, Chang Woo Hong, Jin Hyeok Kim, Sangwoo Lim

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9 Citations (Scopus)

Abstract

Cu2ZnSnS4 (CZTS) absorber layers were prepared from copper acetate, zinc acetate, tin chloride, and thiourea in a solution of methanol, ethylenediamine, and ethanolamine using a sol-gel spin-coating method. Sol-gel precursor solutions were prepared with different metal salt ratios, and the effects on film growth, optical properties, and crystal properties of CZTS films were investigated. In addition, the role of sulfurization temperature on grain size of CZTS and formation of the MoS2 layer at the CZTS and Mo interface were investigated. By changing the metal salt ratio in the precursor solution, a Zn-rich and Cu-poor condition in the CZTS film was obtained. By preparing Zn-rich and Cu-poor CZTS film with a thinner MoS2 layer at a lower sulfurization temperature, the CZTS cell efficiency was improved, and a conversion efficiency of 1.22 % was obtained.

Original languageEnglish
Pages (from-to)3420-3426
Number of pages7
JournalJournal of Materials Science: Materials in Electronics
Volume25
Issue number8
DOIs
Publication statusPublished - 2014 Aug

Bibliographical note

Funding Information:
Acknowledgments This research was supported by the Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2009-0093823) and by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-013R1A1A2008788).

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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