Nonplanar Organic Sensitizers Featuring a Tetraphenylethene Structure and Double Electron-Withdrawing Anchoring Groups.
Two metal-free organic sensitizers containing two N,N-diethylaniline (DEA) moieties and a twisted 1,1,2,2-tetraphenylethene (TPE) structure, dye SD with one anchoring group and dye DD with two anchoring groups, were synthesized and applied in dye-sensitized solar cells (DSSCs). The introduction of a nonplanar TPE structure was used to form a series of propeller-like structures and reduce the tendency of dyes to randomly aggregate on TiO2 surface, but without importing an aggregation-induced emission (AIE) property. The thermal stabilities, UV-vis absorption spectra, electrochemical properties, and photovoltaic parameters of DSSCs with these two dyes were systematically studied and compared with each other. The overall conversion efficiencies (η) of 4.56% for dye SD and 6.08% for dye DD were obtained under AM 1.5 G irradiation.
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.|School of Chemistry and Chemical Engineering, University of South China , Hengyang, 421001, PR China.
Fangshuai
F
Zhang
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Jie
J
Fan
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Huijuan
H
Yu
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Zhuofeng
Z
Ke
School of Chemistry and Chemical Engineering, University of South China , Hengyang, 421001, PR China.
Changming
C
Nie
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Daibin
D
Kuang
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Guang
G
Shao
School of Chemistry and Chemical Engineering, Sun Yat-sen University , Guangzhou, 510275, PR China.
Chengyong
C
Su