Enhancing Grain Growth for Efficient Solution-Processed (Cu,Ag)2 ZnSn(S,Se)4 Solar Cells Based on Acetate Precursor

ACS Applied Materials & Interfaces
Yafang QiSixin Wu

Abstract

Material crystallinity is the overriding factor in the determination of the photoelectric properties of absorber materials and the overall performance of the photovoltaic device. Nevertheless, in the Cu2ZnSn(S,Se)4 (CZTSSe) photovoltaic device, the bilayer or trilayer structure for the absorber has been broadly observed, which is generally harmful to the cell performance because the probability of photogenerated carrier recombination at grain boundaries significantly increased. Herein, our experiment reveals that the application of anions to a new family of (Cu,Ag)2ZnSn(S,Se)4 (CAZTSSe) materials leads to an increase in grain size and crystallinity. It is inspiring that using acetate starting materials in the precursor solution, a uniform, compact, and pinhole-free CAZTS precursor film was obtained, and the smoothness of the films surpassed that of films fabricated from the oxide route. More importantly, the crystallization of the CAZTSSe film has been considerably enhanced after selenization, and large grains going through the entire absorber layer was successfully obtained. Additionally, it is observed that the Voc accompanied by excellent crystallinity improved significantly due to the pronouncedly reduced carrier recombinat...Continue Reading

References

Jul 21, 2006·The Journal of Physical Chemistry. B·T P Ang, W S Chin
Aug 17, 2012·Nature·Michael GraetzelEdward H Sargent
May 20, 2015·ACS Applied Materials & Interfaces·Melanie WernerAyodhya N Tiwari
Sep 25, 2018·ACS Applied Materials & Interfaces·Lijian HuangDaocheng Pan

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Citations

Sep 17, 2021·ACS Applied Materials & Interfaces·Temujin EnkhbatJunHo Kim

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