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Article

Enhancing the Performance of Aqueous Solution-Processed Cu2ZnSn(S,Se)4 Photovoltaic Materials by Mn2+ Substitution

1
Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of Education, Jilin Normal University, Siping 136000, China
2
State Key Laboratory of Superhard Materials and College of Physics, Jilin University, Changchun 130012, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2020, 10(7), 1250; https://doi.org/10.3390/nano10071250
Received: 24 May 2020 / Revised: 19 June 2020 / Accepted: 23 June 2020 / Published: 28 June 2020
In this work, the Cu2MnxZn1−xSn(S,Se)4 (0 ≤ x ≤ 1) (CMZTSSe) alloy films were fabricated by a sol-gel method. Meanwhile, the effects of Mn substitution on the structural, morphological, electrical, optical, and device performance were studied systematically. The clear phase transformation from Cu2ZnSn(S,Se)4 (CZTSSe) with kesterite structure to Cu2MnSn(S,Se)4 (CMTSSe) with stannite structure was observed as x = 0.4. The scanning electron microscope (SEM) results show that the Mn can facilitate the grain growth of CMZTSSe alloy films. Since the x was 0.1, the uniform, compact, and smooth film was obtained. The results show that the band gap of the CMZTSSe film with a kesterite structure was incessantly increased in a scope of 1.024–1.054 eV with the increase of x from 0 to 0.3, and the band gap of the CMZTSSe film with stannite structure was incessantly decreased in a scope of 1.047–1.013 eV with the increase of x from 0.4 to 1. Meanwhile, compared to the power conversion efficiency (PCE) of pure CZTSSe device, the PCE of CMZTSSe (x = 0.1) device is improved from 3.61% to 4.90%, and about a maximum enhanced the open-circuit voltage (VOC) of 30 mV is achieved. The improvement is concerned with the enhancement of the grain size and decrease of the Cu instead of Zn (CuZn) anti-site defects. Therefore, it is believed that the adjunction of a small amount of Mn may be an appropriate approach to improve the PCE of CZTSSe solar cells. View Full-Text
Keywords: Cu2MnxZn1–xSn(S,Se)4; thin films; sol-gel; solar cells; photoelectric performance Cu2MnxZn1–xSn(S,Se)4; thin films; sol-gel; solar cells; photoelectric performance
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MDPI and ACS Style

He, W.; Sui, Y.; Zeng, F.; Wang, Z.; Wang, F.; Yao, B.; Yang, L. Enhancing the Performance of Aqueous Solution-Processed Cu2ZnSn(S,Se)4 Photovoltaic Materials by Mn2+ Substitution. Nanomaterials 2020, 10, 1250. https://doi.org/10.3390/nano10071250

AMA Style

He W, Sui Y, Zeng F, Wang Z, Wang F, Yao B, Yang L. Enhancing the Performance of Aqueous Solution-Processed Cu2ZnSn(S,Se)4 Photovoltaic Materials by Mn2+ Substitution. Nanomaterials. 2020; 10(7):1250. https://doi.org/10.3390/nano10071250

Chicago/Turabian Style

He, Wenjie, Yingrui Sui, Fancong Zeng, Zhanwu Wang, Fengyou Wang, Bin Yao, and Lili Yang. 2020. "Enhancing the Performance of Aqueous Solution-Processed Cu2ZnSn(S,Se)4 Photovoltaic Materials by Mn2+ Substitution" Nanomaterials 10, no. 7: 1250. https://doi.org/10.3390/nano10071250

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