1. Improved Photoconductive Characteristics of Solution-Processed Organic Device by Doping Silole Derivative.
- Author
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Kobayashi, Ryohei, Fukuda, Takeshi, Suzuki, Yuu, Hatano, Ken, Kamata, Norihiko, Aihara, Satoshi, Seo, Hokuto, and Terunuma, Daiyo
- Subjects
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SEMICONDUCTOR doping , *QUANTUM chemistry , *QUANTUM efficiency , *PHOTOCONDUCTIVE cells , *THIN films , *SPINTRONICS - Abstract
By doping 1,1-dimethyl-2,5-bis(N,N-dimethylaminophenyl)-3,4-diphenylsilole (silole-A) in poly(9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT), an improved photoconductive characteristics was observed for a single layer organic device fabricated by a spin-coating process. A maximum external quantum efficiency (EQE) was 8.9% at -20 MV/m when the ratio of silole-A:F8BT was 75 mol%. The EQE of the reference device with F8BT only was 0.06%, and the highest EQE was approximately 160 times higher than that of the reference device. In addition, the photoluminescence (PL) quantum efficiency of the silole-A:F8BT neat film was lower than those of silole-A and F8BT neat films. The lower PL quantum efficiency indicates that the photo-induced carriers efficiently dislocate in the organic layer, resulting in the high EQE of organic photoconductive device. [ABSTRACT FROM AUTHOR]
- Published
- 2010
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