Simple Triphenylamine-Based Hole-Transporting Materials for Perovskite Solar Cells

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• 作者：Songtao Lv^a ; Yakun Song^b ; Junyan Xiao^a ; Lifeng Zhu^a ; Jiangjian Shi^a ; Huiyun Wei^a ; Yuzhuan Xu^a ; Juan Dong^a ; Xin Xu^a ; Shirong Wang^b ; ^c ; Yin Xiao^b ; ^c ; Yanhong Luo^a ; Dongmei Li^a ; ^{dmli@iphy.ac.cn" class="auth_mail" title="E-mail the corresponding author} ; Xianggao Li^b ; ^c ; ^{lixianggao@tju.edu.cn" class="auth_mail" title="E-mail the corresponding author} ; Qingbo Meng^a ; ^c ; ^{qbmeng@iphy.ac.cn" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Perovskite solar cells ; Hole-transporting materials ; Dopant-free ; Triphenylamine derivatives ; Easy synthesis
• 刊名：Electrochimica Acta
• 出版年：2015
• 出版时间：10 November 2015
• 年：2015
• 卷：182
• 期：Complete
• 页码：733-741
• 全文大小：2082 K

文摘

We report two simple triphenylamine-based hole-transporting materials (HTMs) containing vinyl derivatives, 3,6-di(2-(4-(N,N-di(p-tolyl)amino)phenyl)vinyl)-2-thiophene (apv-T) and 3,6-di(2-(4-(N,N-di(p-tolyl)amino)phenyl)vinyl)-9-ethyl-carbazole (apv-EC) for the perovskite solar cells. According to theoretical calculation and experimental results, their HOMO energy levels are similar to that of conventional spiro-OMeTAD, which is supposed to be favorable for the hole transportation in the device. Up to 12% of light-to-electricity conversion efficiency has been achieved for the mesoporous TiO₂/CH₃NH₃PbI₃/apv-EC/Au solar cell without using p-type dopants. Time-resolved photoluminescence (PL) measurement and Electrochemical Impedance Spectra (EIS) further reveal that relatively high hole mobility of the apv-EC and weak recombination occurred at TiO₂/CH₃NH₃PbI₃/apv-EC interfaces of the device are crucial to the good performance in comparison with the apv-T. Advantages such as easy synthesis, low cost and relatively good cell performance provide a potential application as the replacement of the expensive spiro-OMeTAD.