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yexuqing木虫之王 (文学泰斗)
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Efficient perovskite/silicon tandem with asymmetric self-assembly molecule
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Efficient perovskite/silicon tandem with asymmetric self-assembly molecule 采用非对称自组装分子的高效钙钛矿/硅叠层电池 ▲ 作者：Lingbo Jia, Simeng Xia et al. ▲链接： https://www.nature.com/articles/s41586-025-09333-z ▲摘要： 研究人员设计了一种非对称自组装单分子层HTL201，其结构特征为在咔唑核苯环侧分别引入间隔基团和膦酸锚定基团，作为钙钛矿/硅叠层太阳能电池的空穴传输层。 与具有氮键合膦酸基团的对称自组装单分子层相比，HTL201分子展现出更小的空间位阻效应，并在透明导电氧化物复合层上实现了更完整的覆盖。HTL201与钙钛矿薄膜之间的强配位作用有效降低了埋底界面的非辐射复合损失。 值得注意的是，通过优化钙钛矿与HTL201之间的能级排列，配合钙钛矿层准费米能级分裂值的提升，实现了钙钛矿/硅叠层太阳能电池接近2伏的突破性电压，基于硅异质结电池的认证功率转换效率达到34.58%。 ▲ Abstract： Here we design an asymmetric self-assembled monolayer (named as HTL201) featuring an anchoring group and a spacer flanking a carbazole core, serving as a hole-selective layer for perovskite/silicon tandem solar cells. When compared with symmetric self-assembled monolayers with a nitrogen-bonded phosphonic acid group, the HTL201 molecule shows minimized steric hindrance and improved coverage on the transparent conductive oxide recombination layer. The strong coordination interaction between HTL201 and the perovskite film effectively reduces non-radiative recombination at the buried interface. Notably, the optimized energy-level alignment between the perovskite and HTL201, accompanied by an increase in the quasi-Fermi-level splitting value of the perovskite layer, enables an impressive voltage of nearly 2?V for perovskite/silicon tandem solar cells, resulting in a certified power conversion efficiency of up to 34.58% based on a silicon heterojunction solar cell. |
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