A new perspective on optoelectric conversion in conjugated polymers  

作　　者：刘文 张明华 李海宏 王永娟 刘德胜 

机构地区：[1]Physics and Information Engineering Department,Jining University [2]School of Physics,Shandong University

出　　处：《Chinese Physics B》2011年第3期373-377,共5页中国物理B（英文版）

基　　金：supported by the Special Funds of the National Natural Foundation of China (Grant No. 11047148);the Jining University Research Program,China (Grant No. 2010QNKJ04)

摘　　要：Photoexcitation of a neutral soliton will create a polaron and a charged soliton. According to a tight-binding model and a nonadiabatic method, we investigate the dynamical process of these two photogenerated charge carriers in an external electric field. It is found that the polaron and the soliton can pass through each other, which excludes the possibility of carrier recombination that usually occurs in existing organic solar cells. The results indicate a more efficient way to realize the optoelectric conversion by photoexciting polymer materials with soliton defects. On the other hand, it is found that solitons take on greater stability than polarons during collision.Photoexcitation of a neutral soliton will create a polaron and a charged soliton. According to a tight-binding model and a nonadiabatic method, we investigate the dynamical process of these two photogenerated charge carriers in an external electric field. It is found that the polaron and the soliton can pass through each other, which excludes the possibility of carrier recombination that usually occurs in existing organic solar cells. The results indicate a more efficient way to realize the optoelectric conversion by photoexciting polymer materials with soliton defects. On the other hand, it is found that solitons take on greater stability than polarons during collision.

关 键 词：POLARON SOLITON optoelectric conversion 

分 类 号：O469[理学—凝聚态物理]