Structure-performance relationship on the asymmetric methoxy substituents of spiro-OMeTAD for perovskite solar cells

被引：19

作者：

Zhang, Ming-Dao ^{[1
]}

Zhao, Dan-Xia ^{[1
]}

Chen, Li ^{[1
]}

Pan, Na ^{[1
]}

Huang, Cheng-Yan ^{[1
,2
]}

Cao, Hui ^{[1
]}

Chen, Min-Dong ^{[1
]}

机构：

[1] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Atmospher Environm Monitoring & P, Sch Environm Sci & Engn, Dept Chem, Nanjing 210044, Jiangsu, Peoples R China

[2] Nanjing Univ, Jinling Coll, Sch Chem &Life Sci, Nanjing 210089, Jiangsu, Peoples R China

来源：

SOLAR ENERGY MATERIALS AND SOLAR CELLS | 2018年 / 176卷

关键词：

Energy conversion; Hole-transporting materials; Photovoltaic performance; Solar cells; HOLE TRANSPORTING MATERIALS; DENSITY-FUNCTIONAL THEORY; EFFICIENCY; EXCHANGE; CORE;

D O I：

10.1016/j.solmat.2017.10.014

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

The hole-transporting materials (HTMs) play an important role in energy conversion process of perovskite solar cells (PSCs). Here, two spiro-OMeTAD derivatives, 2,4-spiro-OMeTAD and 3,4-spiro-OMeTAD with asymmetric methoxy substituents, have been designed, synthesized and fully characterized. Optimization of the positions of the two methoxy substituents in each of the quadrants was proved to be able to adjust the electronic and optical properties of the HTMs, as investigated by cyclic voltammetry and UV/vis spectroscopy. In particular, PSC devices based on 2,4-spiro-OMeTAD exhibited highly improved photovoltaic performance showing an overall conversion efficiency of 17.2% with excellent stability, which is higher than that of the device derived from spiro-OMeTAD (15.0%) under the same conditions. Besides, 3,4-spiro-OMeTAD based PSCs only achieved a power conversion efficiency of 9.1%, demonstrating a huge influence of HTM structure on the cell performance.

引用

页码：318 / 323

页数：6

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