Insights into the structural and optical properties of (Cu,Ag)2ZnSnSe4 thin films: Role of pre-annealing and selenization times

Mondal, Rohit; Chandra, G. Hema; Subbaiah, Y.P. Venkata; Gupta, Mukul; Prasada Rao, R.

doi:10.1016/j.optmat.2024.115618

Optical Materials

2024

DOI: 10.1016/j.optmat.2024.115618

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Insights into the structural and optical properties of (Cu,Ag)2ZnSnSe4 thin films: Role of pre-annealing and selenization times

Rohit Mondal,

G. Hema Chandra,

Y.P. Venkata Subbaiah

et al.

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Insight into the Role of Rb Doping for Highly Efficient Kesterite Cu2ZnSn(S,Se)4 Solar Cells

Miao,

Sui,

Cui

et al. 2024

Molecules

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Various copper-related defects in the absorption layer have been a key factor impeding the enhancement of the efficiency of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. Alkali metal doping is considered to be a good strategy to ameliorate this problem. In this article, Rb-doped CZTSSe (RCZTSSe) thin films were synthesized using the sol–gel technique. The results show that the Rb atom could successfully enter into the CZTSSe lattice and replace the Cu atom. According to SEM results, a moderate amount of Rb doping aided in enhancing the growth of grains in CZTSSe thin films. It was proven that the RCZTSSe thin film had the densest surface morphology and the fewest holes when the doping content of Rb was 2%. In addition, Rb doping successfully inhibited the formation of CuZn defects and correlative defect clusters and promoted the electrical properties of RCZTSSe thin films. Finally, a remarkable power conversion efficiency of 7.32% was attained by the champion RCZTSSe device with a Rb content of 2%. Compared with that of un-doped CZTSSe, the efficiency improved by over 30%. This study offers new insights into the influence of alkali metal doping on suppressing copper-related defects and also presents a viable approach for improving the efficiency of CZTSSe devices.

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Insight into the Role of Rb Doping for Highly Efficient Kesterite Cu2ZnSn(S,Se)4 Solar Cells

Miao,

Sui,

Cui

et al. 2024

Molecules

View full text Add to dashboard Cite

show abstract

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Insights into the structural and optical properties of (Cu,Ag)2ZnSnSe4 thin films: Role of pre-annealing and selenization times

Cited by 1 publication

References 49 publications

Insight into the Role of Rb Doping for Highly Efficient Kesterite Cu2ZnSn(S,Se)4 Solar Cells

Insight into the Role of Rb Doping for Highly Efficient Kesterite Cu2ZnSn(S,Se)4 Solar Cells

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