Effects of Cu2-xS phase removal on surface potential of Cu2ZnSnS4 thin-films grown by electroplating

Gee Yeong Kim; Ju Ri Kim; William Jo; Kee Doo Lee; Jin Young Kim; Trang Thi Thu Nguyen; Seokhyun Yoon

doi:10.1016/j.cap.2014.09.009

Effects of Cu_2-xS phase removal on surface potential of Cu₂ZnSnS₄ thin-films grown by electroplating

Gee Yeong Kim, Ju Ri Kim, William Jo, Kee Doo Lee, Jin Young Kim, Trang Thi Thu Nguyen, Seokhyun Yoon

Department of Physics

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

22 Scopus citations

Abstract

Cu₂ZnSnS₄ (CZTS) has an optical band gap of 1.4-1.5 eV, which is similar to that of Cu(In,Ga)Se₂ (CIGS), and a high absorption coefficient (>10⁴ cm^-1) in the visible light region. In previous reports, CIGS thin-film solar cells have been shown to improve the performance of the device since the secondary phase is removed by Potassium cyanide (KCN) etching treatment. Therefore, in this study we applied a KCN etching treatment on CZTS and measured the effects. We confirmed the removal of Cu_2-xS via Kelvin probe force microscopy (KPFM) and Raman scattering spectroscopy. The effects of the experiment indicate that we can define with precision the location of the secondary phases, and therefore the control of the secondary phases will be easier and more efficient. Such capabilities could improve the solar cell performance of CZTS thin-films.

Original language	English
Pages (from-to)	1665-1668
Number of pages	4
Journal	Current Applied Physics
Volume	14
Issue number	12
DOIs	https://doi.org/10.1016/j.cap.2014.09.009
State	Published - Dec 2014

Bibliographical note

Funding Information:
This work was supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (No. 20113020010140 ).

Publisher Copyright:
© 2014 Elsevier B.V.

Keywords

Cu(In,Ga)Se
CuZnSn(S,Se)
KCN etching treatment
Kelvin probe force microscopy
Kesterite

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10.1016/j.cap.2014.09.009

Cite this

@article{85e0d4d26faa4fbb96e473a7f09b8496,

title = "Effects of Cu2-xS phase removal on surface potential of Cu2ZnSnS4 thin-films grown by electroplating",

abstract = "Cu2ZnSnS4 (CZTS) has an optical band gap of 1.4-1.5 eV, which is similar to that of Cu(In,Ga)Se2 (CIGS), and a high absorption coefficient (>104 cm-1) in the visible light region. In previous reports, CIGS thin-film solar cells have been shown to improve the performance of the device since the secondary phase is removed by Potassium cyanide (KCN) etching treatment. Therefore, in this study we applied a KCN etching treatment on CZTS and measured the effects. We confirmed the removal of Cu2-xS via Kelvin probe force microscopy (KPFM) and Raman scattering spectroscopy. The effects of the experiment indicate that we can define with precision the location of the secondary phases, and therefore the control of the secondary phases will be easier and more efficient. Such capabilities could improve the solar cell performance of CZTS thin-films.",

keywords = "Cu(In,Ga)Se, CuZnSn(S,Se), KCN etching treatment, Kelvin probe force microscopy, Kesterite",

author = "Kim, {Gee Yeong} and Kim, {Ju Ri} and William Jo and Lee, {Kee Doo} and Kim, {Jin Young} and Nguyen, {Trang Thi Thu} and Seokhyun Yoon",

note = "Funding Information: This work was supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (No. 20113020010140 ). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V.",

year = "2014",

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doi = "10.1016/j.cap.2014.09.009",

language = "English",

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AU - Kim, Gee Yeong

AU - Kim, Ju Ri

AU - Jo, William

AU - Lee, Kee Doo

AU - Kim, Jin Young

AU - Nguyen, Trang Thi Thu

AU - Yoon, Seokhyun

N1 - Funding Information: This work was supported by the New & Renewable Energy Technology Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (No. 20113020010140 ). Publisher Copyright: © 2014 Elsevier B.V.

PY - 2014/12

Y1 - 2014/12

N2 - Cu2ZnSnS4 (CZTS) has an optical band gap of 1.4-1.5 eV, which is similar to that of Cu(In,Ga)Se2 (CIGS), and a high absorption coefficient (>104 cm-1) in the visible light region. In previous reports, CIGS thin-film solar cells have been shown to improve the performance of the device since the secondary phase is removed by Potassium cyanide (KCN) etching treatment. Therefore, in this study we applied a KCN etching treatment on CZTS and measured the effects. We confirmed the removal of Cu2-xS via Kelvin probe force microscopy (KPFM) and Raman scattering spectroscopy. The effects of the experiment indicate that we can define with precision the location of the secondary phases, and therefore the control of the secondary phases will be easier and more efficient. Such capabilities could improve the solar cell performance of CZTS thin-films.

AB - Cu2ZnSnS4 (CZTS) has an optical band gap of 1.4-1.5 eV, which is similar to that of Cu(In,Ga)Se2 (CIGS), and a high absorption coefficient (>104 cm-1) in the visible light region. In previous reports, CIGS thin-film solar cells have been shown to improve the performance of the device since the secondary phase is removed by Potassium cyanide (KCN) etching treatment. Therefore, in this study we applied a KCN etching treatment on CZTS and measured the effects. We confirmed the removal of Cu2-xS via Kelvin probe force microscopy (KPFM) and Raman scattering spectroscopy. The effects of the experiment indicate that we can define with precision the location of the secondary phases, and therefore the control of the secondary phases will be easier and more efficient. Such capabilities could improve the solar cell performance of CZTS thin-films.

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