Similar or different: the same Spiro-core but different alkyl chains with apparently improved device performance of perovskite solar cells

作     者：Fan Liu Shiqing Bi Xiaorui Wang Xuanye Leng Mengmeng Han Baoda Xue Qianqian Li Huiqiong Zhou Zhen Li 

作者机构：Department of Chemistry Hubei Key Lab on Organic and Polymeric Opto-Electronic Materials Wuhan University CAS Key Laboratory of Nanosystem and Hierachical Fabrication CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology Institute of Molecular Aggregation Science Tianjin University 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2019年第62卷第6期

页      面：739-745页

核心收录：

学科分类：07[理学] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China (21734007, 51573140, 51673151, 21773045) the Natural Science Foundation of Hubei Province (2017CFA002) the Fundamental Research Funds for the Central Universities (2042017kf0247, 2042018kf0014) 

主　　题：perovskite solar cells alkyl chains molecular packing 

摘      要：By intelligently utilizing the odd-even effect existing in the melting points of alkanes as presented in the basic textbook of Organic Chemistry, different alkoxy groups were introduced to modify the structure of commercial Spiro-OMeTAD to give new Spiro derivatives of Spiro-OEtTAD, Spiro-OPrTAD, Spiro-OiPrTAD and Spiro-OBuTAD, with the aim to adjust the molecular packing status in perovskite solar cells as hole transporting compounds. Excitedly, with the introduction of ethoxy groups instead of the methoxy ones in Spiro-OMeTAD, Spiro-OEtTAD-based perovskite solar cells demonstrated the highest device performance of 20.16%, higher than that of Spiro-OMeTAD(18.64%).