Wu Chenyu, Liu Yamei, Liu Hui, Duan Chenghao, Pan Qingyan, Zhu Jian, Hu Fan, Ma Xiaoyu, Jiu Tonggang, Li Zhibo, Zhao Yingjie
Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, School of Polymer Science and Engineering , Qingdao University of Science and Technology , Qingdao 266042 , China.
Qingdao Institute of Bioenergy and Bioprocess Technology , Chinese Academy of Sciences , Qingdao 266101 , China.
J Am Chem Soc. 2018 Aug 8;140(31):10016-10024. doi: 10.1021/jacs.8b06291. Epub 2018 Jul 27.
Highly conjugated three-dimensional covalent organic frameworks (3D COFs) were constructed based on spirobifluorene cores linked via imine bonds (SP-3D-COFs) with novel interlacing conjugation systems. The crystalline structures were confirmed by powder X-ray diffraction and detailed structural simulation. A 6- or 7-fold interpenetration was formed depending on the structure of the linking units. The obtained SP-3D-COFs showed permanent porosity and high thermal stability. In application for solar cells, simple bulk doping of SP-3D-COFs to the perovskite solar cells (PSCs) substantially improved the average power conversion efficiency by 15.9% for SP-3D-COF 1 and 18.0% for SP-3D-COF 2 as compared to the reference undoped PSC, while offering excellent leakage prevention in the meantime. By aid of both experimental and computational studies, a possible photoresponsive perovskite-SP-3D-COFs interaction mechanism was proposed to explain the improvement of PSC performance after SP-3D-COFs doping.
基于通过亚胺键连接的螺二芴核心构建了具有新型交错共轭体系的高度共轭三维共价有机框架（3D COF）（SP-3D-COF）。通过粉末X射线衍射和详细的结构模拟确定了晶体结构。根据连接单元的结构形成了6或7重互穿结构。所获得的SP-3D-COF表现出永久孔隙率和高热稳定性。在太阳能电池应用中，与未掺杂的参考钙钛矿太阳能电池（PSC）相比，将SP-3D-COF简单本体掺杂到钙钛矿太阳能电池（PSC）中，SP-3D-COF 1的平均功率转换效率大幅提高了15.9%，SP-3D-COF 2提高了18.0%，同时具有出色的防漏电性能。借助实验和计算研究，提出了一种可能的光响应性钙钛矿-SP-3D-COF相互作用机制来解释SP-3D-COF掺杂后PSC性能的改善。
