文献类型：期刊文献

英文题名：Light-Absorbing Pyridine Derivative as a New Electrolyte Additive for Developing Efficient Porphyrin Dye-Sensitized Solar Cells

作者：Zou, Jiazhi[1,2];Yan, Qifan[1,2];Li, Chengjie[1,2];Lu, Yunyue[1,2];Tong, Zhangfa[3];Xie, Yongshu[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc In, Nanning 530004, Peoples R China

年份：2020

卷号：12

期号：51

起止页码：57017

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20210209736524);WOS:【SCI-EXPANDED(收录号:WOS:000603397200032)】；

基金：This work was financially supported by the NSFC (21772041, 21811530005, 201702062, and 21971063), the Program of Shanghai Academic Research Leader (20XD1401400), the Open Project of Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology (2018k013), the Natural Science Foundation of Shanghai (20ZR1414100), and the Fundamental Research Funds for the Central Universities (WK1616004, 222201717003, and 222201714013). The authors thank the Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：porphyrin; dye-sensitized solar cell; axial coordination; pyridine derivatives; electrolyte

摘要：To fabricate efficient dye-sensitized solar cells (DSSCs), 4-tert-butylpyridine (TBP) is commonly used as an additive in the electrolytes for improving the photovoltages (V-OC). However, TBP cannot play a positive role in improving the photocurrent (J(SC)) because of the lack of absorption in the visible-wavelength range. We herein report a light-absorbing pyridine derivative Ni as an additive for the axial coordination with porphyrin dyes. Ni was synthesized by introducing a (bis(4-methoxyphenyl)amino)anthryl moiety into the para-position of pyridine via an acetylene bridge, and porphyrin dye XW64 containing meso-3,5-disubstituted phenyl groups was synthesized considering that the meta-substituted phenyl groups may induce weaker steric hindrance with the axial pyridyl ligand, as compared with wrapped and strapped porphyrin dyes. Thus, Ni was used as an electrolyte additive together with TBP. When optimized concentrations of 6 mM Ni and 0.5 M TBP were used for fabricating DSSCs based on XW64, enhanced photovoltaic performance was achieved, with J(SC), V-OC, and efficiency of 15.65 mA.cm(-2), 0.701 V, and 7.35%, respectively, superior to those of the corresponding DSSCs without using the additives (J(SC) = 14.86 mA.cm(- ), V-OC = 0.599 V, and efficiency = 5.94%). The enhancement of J(SC) can be ascribed to the improved light-harvesting ability induced by the axially coordinated Ni. Furthermore, the two additives also can be used to fabricate efficient solar cells based on the wrapped porphyrin dye XW42, achieving high efficiency of 10.3%, indicative of their general applicability in fabricating high-performance DSSCs. These results indicate that the simultaneous employment of the traditional TBP additive and a pyridyl ligand with light-harvesting ability in the electrolyte for the axial coordination to a porphyrin dye is a promising approach for developing efficient DSSCs.