Transport Properties and Devices of a rigid rod conjugated polymer
Molecular electronics has developed rapidly recently. However, it is still a challenging of studying transport properties of polymer materials. Here, we will introduce our study of transport properties and devices of a rigid rod conjugated polymer.The transport properties depend strongly on the orientation of polymer molecules in films. 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(tetrafluoroethylene) substrates. TA-PPE molecules were found to be exactly oriented with their conjugated backbones along the PTFE sliding direction. Photo-response characteristics based on the uniaxially ordered film was significantly improved compared to that of devices with disordered film. For example, the switch on/off ratio of the photo switchers 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 carriers transport along the highly aligned polymer films, in which the molecules of TA-PPE oriented along the carriers transport direction of the devices.
Wenping Hu
Institute of Chemistry,Chinese Academy of Sciences,Beijing 100080,China
国际会议
5th International Symposium on High-Tech Polymer Materials(HTPM-V)(第五届国际高技术高分子材料学术会议)
北京
英文
173
2008-10-27（万方平台首次上网日期，不代表论文的发表时间）