Effect of selenization on local current and surface potential of sputtered Cu2ZnSn(S, Se)4 thin-films with 8% conversion efficiency

Gee Yeong Kim, Ah Reum Jeong, Ju Ri Kim, William Jo, D. H. Kim, D. K. Hwang, S. J. Sung, J. K. Kang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Cu2ZnSn(S, Se)4 (CZTSSe) is emerged as a promising material because of non-toxic, inexpensive and earth abundant more than Cu(In, Ga)Se2. The highest conversion efficiency of CZTSSe is 11.1 % at IBM based on hydrazine process [1]. We have achieved CZTSSe thin-film solar cell 8% conversion efficiency by sputtering process. CZTSSe thin-films show different efficiency depending on selenization process. Depending on the different selenization process, conversion efficiencies in each sample are definitely distinguished from 8.06 to 3.17%. We investigated local electrical properties on these samples. The local surface potential is also critically different, which is ∼ 200 mV on 8.06% film and ∼ 70 mV on 3.17% film. From these results, we can suggest that selenization process can affect to local electrical characteristic as well as improving solar cell performances.

Original languageEnglish
Title of host publication39th IEEE Photovoltaic Specialists Conference, PVSC 2013
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages383-385
Number of pages3
ISBN (Print)9781479932993
DOIs
StatePublished - 2013
Event39th IEEE Photovoltaic Specialists Conference, PVSC 2013 - Tampa, FL, United States
Duration: 16 Jun 201321 Jun 2013

Publication series

NameConference Record of the IEEE Photovoltaic Specialists Conference
ISSN (Print)0160-8371

Conference

Conference39th IEEE Photovoltaic Specialists Conference, PVSC 2013
Country/TerritoryUnited States
CityTampa, FL
Period16/06/1321/06/13

Keywords

  • Carrier transport
  • CZTSSe
  • Scanning probe microscopy
  • Selenization
  • Work function

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