Back cover image: In article number cey2.434, Yang and co-workers reported vertical plane depth-resolved surface potential and carrier separation characteristics in flexible Cu₂ZnSn(S,Se)₄ solar cells. The band energy structure was predicted between the intragrains and the grain boundaries. To minimize carrier recombination, it is necessary to form an upward band bending structure over the entire absorber at the grain boundaries and to form a current path in the intragrains.

中文翻译：

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封底图片，第 6 卷，第 3 号，2024 年 3 月

封底图片：在文章编号 cey2.434 中，Yang 及其同事报道了柔性 Cu ₂ ZnSn(S,Se) ₄太阳能电池中的垂直平面深度分辨表面电势和载流子分离特性。预测了晶内和晶界之间的能带结构。为了最大限度地减少载流子复合，有必要在晶界处的整个吸收体上形成向上的能带弯曲结构，并在晶粒内形成电流路径。