A comparative study of solution based CIGS thin film growth on different glass substrates

Se Jin Park, Eunjoo Lee, Hyo Sang Jeon, Se Jin Ahn, Min Kyu Oh, Byoung Koun Min

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

CuIn x Ga 1-x Se y S 2-y (CIGS) thin films were synthesized on glass substrates by a paste coating of Cu, In, and Ga precursor solution with a three-step heat treatment process: oxidation, sulfurization, and selenization. In particular, morphological changes of CIGS films for each heat treatment step were investigated with respect to the kinds of glass substrates: bare, Mo-coated, and F-doped SnO 2 (FTO) soda-lime glasses. Very high quality CIGS film with large grains and low degree of porosity was obtained on the bare glass substrate. Similar morphology of CIGS film was also acquired on the Mo-coated glass except the formation of an undesired Mo oxide interfacial layer due to the partial oxidation of Mo layer during the first heat treatment under ambient conditions. On the other hand, CIGS film with much smaller grains and higher degree of porosity was gained when FTO glass was used as a substrate, resulting in slight solar to electricity conversion behavior (0.20%). Higher power conversion efficiency (1.32%) was attained by the device with the CIGS film grown on Mo-coated glass in spite of the presence of a Mo oxide impurity layer.

Original languageEnglish
Pages (from-to)120-125
Number of pages6
JournalApplied Surface Science
Volume258
Issue number1
DOIs
Publication statusPublished - 2011 Oct 15

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Keywords

  • CIGS
  • Solar cells
  • Solution processes
  • Substrates

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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