Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu2ZnSn(S,Se)4 solar cells

Juran Kim; Jayeong Kim; Eunji Ko; Seokhyun Yoon; Jun Hyoung Sim; Kee Jeong Yang; Dae Hwan Kim; Jin Kyu Kang; Yu Jin Song; Chan Wook Jeon; William Jo

doi:10.1002/pip.3248

Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu₂ZnSn(S,Se)₄ solar cells

Juran Kim, Jayeong Kim, Eunji Ko, Seokhyun Yoon, Jun Hyoung Sim, Kee Jeong Yang, Dae Hwan Kim, Jin Kyu Kang, Yu Jin Song, Chan Wook Jeon, William Jo

Department of Physics

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

12 Scopus citations

Abstract

We report highly efficient Cu₂ZnSn(S,Se)₄ (CZTSSe) thin films with a power conversion efficiency (PCE) of 12.3% at their surface and interface. The structural and electrical properties were locally investigated, using scanning probe microscopy and micro-Raman scattering, to improve the performance of kesterite solar cells. Interestingly, this research reports quite different results from the conventional kesterite solar cells, owing to the observance of undesirable voids and secondary phases. Nonetheless, the solar cells exhibit a high PCE of over 12%. Thus, we probe the kesterite solar cells as a function of the depth and introduce a mechanical dimple-etching process. The relatively low melting temperature of the pure-metal precursors results in the unique properties within the solar cell materials. Understanding these phenomena and their effects on carrier behavior enables the achievement of a higher PCE and better performance for kesterite solar cells.

Original language	English
Pages (from-to)	382-392
Number of pages	11
Journal	Progress in Photovoltaics: Research and Applications
Volume	28
Issue number	5
DOIs	https://doi.org/10.1002/pip.3248
State	Published - 1 May 2020

Bibliographical note

Funding Information:
This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF‐2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19‐BD‐05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea.

Funding Information:
This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF-2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19-BD-05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea.

Publisher Copyright:
© 2020 John Wiley & Sons, Ltd.

Keywords

CuZnSn(S,Se) solar cells
Kelvin probe force microscopy
carrier transport
micro-Raman spectroscopy
nano-Auger electron spectroscopy

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10.1002/pip.3248

Cite this

@article{98e4579d975740afb3bc083e1fd0a370,

title = "Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu2ZnSn(S,Se)4 solar cells",

abstract = "We report highly efficient Cu2ZnSn(S,Se)4 (CZTSSe) thin films with a power conversion efficiency (PCE) of 12.3% at their surface and interface. The structural and electrical properties were locally investigated, using scanning probe microscopy and micro-Raman scattering, to improve the performance of kesterite solar cells. Interestingly, this research reports quite different results from the conventional kesterite solar cells, owing to the observance of undesirable voids and secondary phases. Nonetheless, the solar cells exhibit a high PCE of over 12%. Thus, we probe the kesterite solar cells as a function of the depth and introduce a mechanical dimple-etching process. The relatively low melting temperature of the pure-metal precursors results in the unique properties within the solar cell materials. Understanding these phenomena and their effects on carrier behavior enables the achievement of a higher PCE and better performance for kesterite solar cells.",

keywords = "CuZnSn(S,Se) solar cells, Kelvin probe force microscopy, carrier transport, micro-Raman spectroscopy, nano-Auger electron spectroscopy",

author = "Juran Kim and Jayeong Kim and Eunji Ko and Seokhyun Yoon and Sim, {Jun Hyoung} and Yang, {Kee Jeong} and Kim, {Dae Hwan} and Kang, {Jin Kyu} and Song, {Yu Jin} and Jeon, {Chan Wook} and William Jo",

note = "Funding Information: This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF‐2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19‐BD‐05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea. Funding Information: This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF-2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19-BD-05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea. Publisher Copyright: {\textcopyright} 2020 John Wiley & Sons, Ltd.",

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AU - Kim, Juran

AU - Kim, Jayeong

AU - Ko, Eunji

AU - Yoon, Seokhyun

AU - Sim, Jun Hyoung

AU - Yang, Kee Jeong

AU - Kim, Dae Hwan

AU - Kang, Jin Kyu

AU - Song, Yu Jin

AU - Jeon, Chan Wook

AU - Jo, William

N1 - Funding Information: This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF‐2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19‐BD‐05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea. Funding Information: This work was supported by grants 2016M1A2A2936753 and 2016M1A2A2936784 from the Technology Development Program to Solve Climate Change through the National Research Foundation of Korea, grant NRF-2018R1A6A1A03025340 from Basic Science Research Program through the NRF funded by the Ministry of Education, and grant 19-BD-05 from the DGIST R&D Program funded by the Ministry of Science, ICT and Future Planning, Republic of Korea. Publisher Copyright: © 2020 John Wiley & Sons, Ltd.

PY - 2020/5/1

Y1 - 2020/5/1

N2 - We report highly efficient Cu2ZnSn(S,Se)4 (CZTSSe) thin films with a power conversion efficiency (PCE) of 12.3% at their surface and interface. The structural and electrical properties were locally investigated, using scanning probe microscopy and micro-Raman scattering, to improve the performance of kesterite solar cells. Interestingly, this research reports quite different results from the conventional kesterite solar cells, owing to the observance of undesirable voids and secondary phases. Nonetheless, the solar cells exhibit a high PCE of over 12%. Thus, we probe the kesterite solar cells as a function of the depth and introduce a mechanical dimple-etching process. The relatively low melting temperature of the pure-metal precursors results in the unique properties within the solar cell materials. Understanding these phenomena and their effects on carrier behavior enables the achievement of a higher PCE and better performance for kesterite solar cells.

AB - We report highly efficient Cu2ZnSn(S,Se)4 (CZTSSe) thin films with a power conversion efficiency (PCE) of 12.3% at their surface and interface. The structural and electrical properties were locally investigated, using scanning probe microscopy and micro-Raman scattering, to improve the performance of kesterite solar cells. Interestingly, this research reports quite different results from the conventional kesterite solar cells, owing to the observance of undesirable voids and secondary phases. Nonetheless, the solar cells exhibit a high PCE of over 12%. Thus, we probe the kesterite solar cells as a function of the depth and introduce a mechanical dimple-etching process. The relatively low melting temperature of the pure-metal precursors results in the unique properties within the solar cell materials. Understanding these phenomena and their effects on carrier behavior enables the achievement of a higher PCE and better performance for kesterite solar cells.

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KW - Kelvin probe force microscopy

KW - carrier transport

KW - micro-Raman spectroscopy

KW - nano-Auger electron spectroscopy

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