Simple Triphenylamine-Based Hole-Transporting Materials for Perovskite Solar Cells. (10th November 2015)

• Record Type: Journal Article
• Authors: Lv, Songtao; Song, Yakun; Xiao, Junyan; Zhu, Lifeng; Shi, Jiangjian; Wei, Huiyun; Xu, Yuzhuan; Dong, Juan; Xu, Xin; Wang, Shirong; Xiao, Yin; Luo, Yanhong; Li, Dongmei; Li, Xianggao; Meng, Qingbo
• Is Part Of: Electrochimica acta. Volume 182(2015)
• Page Start: 733
• Page End: 741
• Publication Date: 2015-11-10
• Subjects: Perovskite solar cells -- Hole-transporting materials -- Dopant-free -- Triphenylamine derivatives -- Easy synthesis; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.09.165
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Abstract: 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 /CH3 NH3 PbI3 /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 /CH3 NH3 PbI3 /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.