Efficiency Enhancement by Optimizing Selenization Time for Co-Sputtered Cu2ZnSn(S,Se)4 Thin Film Solar Cells

Luan Hong Sun; Hong Lie Shen; Hu Lin Huang; Hui Rong Shang

doi:10.4028/www.scientific.net/KEM.793.35

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 793Efficiency Enhancement by Optimizing Selenization...

Efficiency Enhancement by Optimizing Selenization Time for Co-Sputtered Cu₂ZnSn(S,Se)₄ Thin Film Solar Cells

Abstract:

To reveal the effects of annealing condition on CZTSSe thin film solar cells, co-sputtering and subsequent selenization were used to prepare CZTSSe thin films. Structural, morphological and optical properties of CZTSSe thin films were investigated. CZTSSe thin films with various Se/(S+Se) ratio ranging from 0.69-0.78 were obtained. Representative peaks corresponding to CZTSSe in XRD and Raman results showed a slight shift to lower diffraction angle and wavenumbers. Selenization time significantly influenced the morphologies of CZTSSe films and the gradual grown up grain size was observed. V_OC deficit values down to 839 mV was achieved for the best cell. CZTSSe solar cell with the selenization time of 10 min showed a best conversion efficiency of 5.32%, which presented a 50% enhancement comparing to the solar cells with insufficient and over-selenized absorbers.

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Periodical:

Key Engineering Materials (Volume 793)

Pages:

35-39

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.793.35

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Online since:

January 2019

Authors:

Luan Hong Sun, Hong Lie Shen*, Hu Lin Huang, Hui Rong Shang

Keywords:

Band Gap, CZTSSe, EQE, Selenization

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* - Corresponding Author

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