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.
Wan
Jun-Hua
JH
Institute of Advanced Materials (IAM), Fudan University, Shanghai 200433, China.
Feng
Jia-Chun
JC
Wen
Gui-An
GA
Wei
Wei
W
Fan
Qu-Li
QL
Wang
Chuan-Ming
CM
Wang
Hong-Yu
HY
Zhu
Rui
R
Yuan
Xiang-Dong
XD
Huang
Chun-Hui
CH
Huang
Wei
W