Exciton diffusion and dissociation in conjugated polymer/fullerene heterostructures

被引:1
|
作者
Markov, DE [1 ]
Amsterdam, E [1 ]
Blom, PWM [1 ]
Sieval, AB [1 ]
Hummelen, JC [1 ]
机构
[1] Univ Groningen, Ctr Mat Sci Plus, NL-9747 AG Groningen, Netherlands
来源
关键词
conjugated polymer; exciton diffusion; charge transport;
D O I
10.1117/12.546041
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Time-resolved luminescence spectroscopy has been used to investigate exciton diffusion in thin films of poly(p-phenylene vinylene) (PPV) based derivatives. Exciton density distribution upon photoexcitation in polymer/fullerene heterostructures has been modeled and exciton diffusion length values of 5 nm and 6 nm are estimated for two different PPV derivatives, which differ by three orders of magnitude in charge carrier mobility due to reduced energetic disorder. Hence, the exciton diffusion length is not correlated to the charge carrier mobility in this class of materials.
引用
收藏
页码:449 / 454
页数:6
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