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

Abstract

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
Volume475
DOIs
Publication statusPublished - 2019 May 1

Fingerprint

Powders
Compaction
Thin films
thin films
Porosity
grain size
porosity
packing density
Solar cells
sintering
Sintering
solar cells
Vapors
vapors
costs
Costs

All Science Journal Classification (ASJC) codes

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

Cite this

Song, Bong Geun ; Ahn, Hak Young ; Park, Bo In ; Park, Hyung Ho ; Ju, Byeong Kwon ; Lee, Seung Yong ; Park, Jong Ku ; Cho, So Hye. / Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se 2 thin films In: Applied Surface Science. 2019 ; Vol. 475. pp. 158-161.
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abstract = "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.",
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Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se 2 thin films . / Song, Bong Geun; Ahn, Hak Young; Park, Bo In; Park, Hyung Ho; Ju, Byeong Kwon; Lee, Seung Yong; Park, Jong Ku; Cho, So Hye.

In: Applied Surface Science, Vol. 475, 01.05.2019, p. 158-161.

Research output: Contribution to journalArticle

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T1 - Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se 2 thin films

AU - Song, Bong Geun

AU - Ahn, Hak Young

AU - Park, Bo In

AU - Park, Hyung Ho

AU - Ju, Byeong Kwon

AU - Lee, Seung Yong

AU - Park, Jong Ku

AU - Cho, So Hye

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AB - 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.

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