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CuPbSbS 3 (bournonite) has emerged as a promising light-absorbing material for thin-film solar cells due to its attractive photophysical properties. The crystallinity of CuPbSbS 3 films is a main challenge of achieving high power conversion efficiency. Herein, we perform a series of optimization strategies to enhance the crystallinity of CuPbSbS 3 films, including adjusting the annealing temperature and reducing the carbon residue. The optimized CuPbSbS 3 film acquires an enhanced crystallinity, and an optimal solar cell device based on it achieves a power conversion efficiency of 2.65% with good stability. This efficiency is the highest value for CuPbSbS 3 solar cells up to now.
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Zhang et al. (2021) studied this question.
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