期刊
LANGMUIR
卷 24, 期 23, 页码 13241-13244出版社
AMER CHEMICAL SOC
DOI: 10.1021/la8026094
关键词
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资金
- National Natural Science Foundation of China
- German-Chinese Transregio project
- Ministry of Science and Technology of China
- Chinese Academy of Sciences
Molecules of a rigid rod conjugated polymer, a derivative of poly(para-phenylene ethynylene)s with thioacetyl end groups (TA-PPE), were well aligned by drop-casting the polymer solution onto the friction-transferred poly(tetraflLloroethylene) substrates. TA-PPE molecules were found to be exactly oriented with their conjugated backbones along the PTFE sliding direction. Photoresponse characteristics based on the uniaxially ordered film were significantly improved compared to those of devices with the disordered film. For example, the switch on/off ratio of the photoswitchers with aligned molecules was as high as 330-400, while that of devices without alignment was only 8-12. It was due to the efficient carrier transport along the highly aligned polymer films, in which the molecules of TA-PPE oriented along the carrier transport direction of the devices.
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