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Cu2ZnSnS4 monograin layer solar cells for flexible photovoltaic applications

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Summary: The efficiency of CZTS solar cells can be improved by controlling the intermixing of Cd and Cu at the CZTS/CdS interface. Cd diffusion into the CZTS surface after CdS air-annealing forms an ultra-thin Cu2Zn (x) Cd1-x SnS4 layer, reducing interface recombination and enhancing the performance of the cell.

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Summary: Research has shown that the temperature and duration of air annealing play a crucial role in the performance of CZTS/CdS heterojunction devices, with different annealing methods having varying effects on device efficiency. Through effects such as elemental intermixing and Cu-Zn ordering, the performance of the CZTS/CdS interface can be improved, but the issue of copper enrichment at the interface still needs to be addressed.

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