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

doi:10.1016/j.apsusc.2018.12.196

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

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 language	English
Pages (from-to)	158-161
Number of pages	4
Journal	Applied Surface Science
Volume	475
DOIs	https://doi.org/10.1016/j.apsusc.2018.12.196
Publication status	Published - 2019 May 1

Keywords

Cu(In
Ga)Se
Light absorbing layer
Photovoltaic materials
Powder process
Thin films

ASJC Scopus subject areas

Condensed Matter Physics
Surfaces, Coatings and Films
Surfaces and Interfaces

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.apsusc.2018.12.196

Cite this

Song, B. G., Ahn, H. Y., Park, B. I., Park, H. H., Ju, B. K., Lee, S. Y., Park, J. K., & Cho, S. H. (2019). Effects of compression and controlled selenization on powder-fabricated Cu(In,Ga)Se ₂ thin films Applied Surface Science, 475, 158-161. https://doi.org/10.1016/j.apsusc.2018.12.196

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

Research output: Contribution to journal › Article › peer-review

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

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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author = "Song, {Bong Geun} and Ahn, {Hak Young} and Park, {Bo In} and Park, {Hyung Ho} and Ju, {Byeong Kwon} and Lee, {Seung Yong} and Park, {Jong Ku} and Cho, {So Hye}",

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]]. 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 ]]. Publisher Copyright: {\textcopyright} 2018",

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AU - Lee, Seung Yong

AU - Park, Jong Ku

AU - Cho, So Hye

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PY - 2019/5/1

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N2 - 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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