Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se 2 thin films

Bong Geun Song, Hak Young Ahn, Bo In Park, Hyung Ho Park, Byeong Kwon Ju, Seung Yong Lee, Jong Ku Park, So Hye Cho

Research output: Contribution to journalArticle

1 Citation (Scopus)


Cu(In,Ga)Se 2 thin films have been used as a light absorbing layer in high-efficiency solar cells. Among many methods, the powder process for fabricating Cu(In,Ga)Se 2 thin films is advantageous, due to its simplicity and minimal usage of materials. However, Cu(In,Ga)Se 2 layers produced by the powder process often result in high porosity and small grain sizes, which has been a significant barrier to wide application. In this report, we demonstrate that simple compression of the Cu(In,Ga)S 2 powder coat and a cost-efficient selenization using a mixture of Se and Al 2 O 3 can reduce porosity and enlarge the grain size. It is surmised that improved particle packing density in the powder coats, in addition to sintering with a steady supply of Se vapor, synergistically enhances highly sintered Cu(In,Ga)Se 2 thin films.

Original languageEnglish
Pages (from-to)158-161
Number of pages4
JournalApplied Surface Science
Publication statusPublished - 2019 May 1

Bibliographical note

Funding Information:
This work was supported by the KIST institutional funding [grant number: 2E28020 ] and the R&D Convergence Program of NST (National Research Council of Science & Technology) of Republic of Korea [grant number: CAP-16-10-KIMS ]].

All Science Journal Classification (ASJC) codes

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

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