文献类型：期刊文献

英文题名：Efficient and Stable Chemical Passivation on Perovskite Surface via Bidentate Anchoring

作者：Zhang, Hao[1,2];Wu, Yongzhen[1,2];Shen, Chao[1,2];Li, Erpeng[1,2];Yan, Chenxu[1,2];Zhang, Weiwei[1,2];Tian, He[1,2];Han, Liyuan[3];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Shanghai Key Lab Funct Mat Chem,Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Inst Fine Chem,Joint Int Res Lab Precis Chem, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, State Key Lab Met Matrix Composites, 800 Dong Chuan Rd, Shanghai 200240, Peoples R China

年份：2019

卷号：9

期号：13

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20190806519225);WOS:【SCI-EXPANDED(收录号:WOS:000467131300006)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21788102, 21421004, 21636002, 21822504, and 21706070), National key Research and Development Program (2016YFA0200300), Program of Introducing Talents of Discipline to Universities (B16017), Eastern Scholar (TP2016018), Science and Technology Commission of Shanghai Municipality (17ZR1407400), and China Association of Science and Technology (2017QNRC001). The authors thank Prof. Jing Xu (School of Chemical Engineering, East China University of Science and Technology) for the help on Raman spectral measurement, and Research Center of Analysis and Test of East China University of Science and Technology for XRD characterizations.

语种：英文

外文关键词：2-mercaptopyridine; chemical passivation; perovskite solar cell; stability enhancement

摘要：Chemical passivation is an effective approach to suppress the grain surface dominated charge recombination in perovskite solar cells (PSCs). However, the passivation effect is usually labile on perovskite crystal surface since most passivating agents are weakly anchored. Here, the use of a bidentate molecule, 2-mercaptopyridine (2-MP), to increase anchoring strength for improving the passivation efficacy and stability synchronously is demonstrated. Compared to monodentate counterparts of pyridine and p-toluenethiol, 2-MP passivation on CH3NH3PbI3 film results in twofold improvement of photoluminescence lifetime and remarkably enhanced tolerance to chlorobenzene washing and vacuum heating, which improve the power conversion efficiency of n-i-p planar structured PSCs from 18.35% to 20.28%, with open-circuit voltage approaching 1.18 V. Moreover, the CH3NH3PbI3 films passivated with 2-MP exhibit unprecedented humid-stability that they can be exposed to saturated humidity for at least 5 h, mainly due to the passivation induced surface deactivation, which renders the unencapsulated devices retaining 93% of the initial efficiency after 60 days aging in air with relative humidity of 60-70%.