化学
双功能
卤素
钙钛矿(结构)
卤键
超分子化学
光谱学
固态
核磁共振波谱
调制(音乐)
结晶学
固态核磁共振
二维核磁共振波谱
立体化学
物理化学
核磁共振
晶体结构
有机化学
催化作用
烷基
哲学
美学
物理
量子力学
作者
Marco A. Ruiz‐Preciado,Dominik J. Kubicki,Albert Hofstetter,Lucie McGovern,Moritz H. Futscher,Amita Ummadisingu,Renana Gershoni‐Poranne,Shaik M. Zakeeruddin,Bruno Ehrler,Lyndon Emsley,Jovana V. Milić,Michaël Grätzel
摘要
There has been an ongoing effort to overcome the limitations associated with the stability of hybrid organic-inorganic perovskite solar cells by using different organic agents as additives to the perovskite formulations. The functionality of organic additives has been predominantly limited to exploiting hydrogen-bonding interactions, while the relevant atomic-level binding modes remain elusive. Herein, we introduce a bifunctional supramolecular modulator, 1,2,4,5-tetrafluoro-3,6-diiodobenzene, which interacts with the surface of the triple-cation double-halide perovskite material via halogen bonding. We elucidate its binding mode using two-dimensional solid-state 19F NMR spectroscopy in conjunction with density functional theory calculations. As a result, we demonstrate a stability enhancement of the perovskite solar cells upon supramolecular modulation, without compromising the photovoltaic performances.
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