Du Bin, Lin Yuexin, Ma Jintao, Gu Weidan, Liu Fei, Yao Yijun, Song Lin
School of Materials Science and Engineering, Xi'an Polytechnic University Xi'an 710048 China
MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, School of Physics, National Innovation Platform (Center) for Industry-Education Integration of Energy Storage Technology, Xi'an Jiaotong University Xi'an 710049 P. R. China.
Chem Sci. 2024 Dec 18;16(4):1876-1884. doi: 10.1039/d4sc06932c. eCollection 2025 Jan 22.
The interface between the perovskite layer and the electron transport layer is an extremely important factor that cannot be ignored in achieving high-performance perovskite photovoltaic technology. However, the void defects of the interface pose a serious challenge for high performance perovskite solar cells (PSCs). To address this, we report a polydentate ligand reinforced chelating strategy to strengthen the stability of the buried interface by managing interfacial defects and stress. Gelatin-coupled cellulose (GCC) is employed to manipulate the buried interface. The unique functional groups in GCC synergistically passivate the defects from the surface of SnO and the bottom surface of the perovskite layer. Our work demonstrates that by implementing GCC as a buried interface strategy, it is possible to prepare devices with reduced vacancy states, non-radiative recombination suppression, and excellent optoelectronic performance. At the same time, this work improves the efficiency and stability of PSCs and provides greater space for device manufacturing.
钙钛矿层与电子传输层之间的界面是实现高性能钙钛矿光伏技术中一个不可忽视的极其重要的因素。然而，界面的空洞缺陷对高性能钙钛矿太阳能电池（PSC）构成了严峻挑战。为解决这一问题，我们报告了一种多齿配体强化螯合策略，通过管理界面缺陷和应力来增强掩埋界面的稳定性。采用明胶偶联纤维素（GCC）来调控掩埋界面。GCC中独特的官能团协同钝化了来自SnO表面和钙钛矿层底面的缺陷。我们的工作表明，通过将GCC作为一种掩埋界面策略，可以制备出具有减少的空位态、抑制非辐射复合以及优异光电性能的器件。同时，这项工作提高了PSC的效率和稳定性，并为器件制造提供了更大的空间。
