Dibenzo[f,h]thieno[3,4-b] quinoxaline-based small molecules for efficient bulk-heterojunction solar cells.
Two isomeric compounds (1 and 2) containing a dibenzo[f,h]thieno[3,4-b]quinoxaline core and two peripheral arylamines were synthesized. Solution-processed bulk heterojunction (BHJ) solar cells based on these sensitizers and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) are reported. The cell fabricated from 1/67 wt % of PCBM exhibited a high power conversion efficiency of 1.70% and an external quantum yield of 55%. The film of the cell was found to have balanced electron and hole mobility and good film morphology.
Institute of Chemistry, Academia Sinica, Nankang, Taiwan.
Marappan
M
Velusamy
Jen-Hsien
JH
Huang
Ying-Chan
YC
Hsu
Hsien-Hsin
HH
Chou
Kuo-Chuan
KC
Ho
Pei-Lun
PL
Wu
Wei-Hau
WH
Chang
Jiann T
JT
Lin
Chih-Wei
CW
Chu