Effective tuning of HOMO and LUMO energy levels by p-n diblock and triblock oligomer approaches.
A novel series of oligomers consisting of thiophene as a p-type unit and oxadiazole as an n-type unit were separately synthesized. On the basis of the characterization of photophysical and electrochemical properties, the structure-property relationships of the oligomers were investigated. Cyclic voltammogram studies showed that changing the number of thiophene and oxadiazole units could effectively modulate the electronic properties of the p-n diblock and triblock oligomers. The effect of molecular regiochemistry on electronic properties is also investigated. The observed electronic properties were consistent with theoretical calculations. These systems serve as excellent examples, demonstrating the band gap control principle in the p-n heterostructure oligomers.
Institute of Advanced Materials (IAM), Fudan University, Shanghai 200433, China.
Jun-Hua
JH
Wan
Jia-Chun
JC
Feng
Gui-An
GA
Wen
Wei
W
Wei
Qu-Li
QL
Fan
Chuan-Ming
CM
Wang
Hong-Yu
HY
Wang
Rui
R
Zhu
Xiang-Dong
XD
Yuan
Chun-Hui
CH
Huang
Wei
W
Huang