| 학회 |
한국재료학회 |
| 학술대회 |
2018년 가을 (11/07 ~ 11/09, 여수 디오션리조트) |
| 권호 |
24권 2호 |
| 발표분야 |
A. 전자/반도체 재료 분과 |
| 제목 |
Synthetic strategy to generate color selectivity with a thin film polymer photodiode: difulorobenzothiadiazole based Donor-Acceptor polymer with enhanced space charge carriers |
| 초록 |
A synthesis approach that enhances charge-accumulation of polymer photodiodes enables well-defined color selectivity to be achieved in thin film thicknesses less than 1 µm, an important requirement for organic image sensor. A polymer photodiode (PPD) not only renders color selectivity but also a high peak detectivity of ~6×1012 Jones at 650 nm. It is implying that charge collection narrowing (CCN) mechanism is operated, which is extraordinary because typical spectral response of ~500-nm-thick bulk heterojunction (BHJ)-based PPD is equal to the absorption spectrum of the BHJ film. We infer the origin of such a thin film CCN in POFPhDT2FBT:PCBM BHJ as a weakened ICT between donor and acceptor of POFPhDT2FBT, which results in near-isotropic molecular orientation with short range π-π ordering. As a results of space charge carrier, in the case of POFPhDT2FBT, CCN mechanism can be realized within 1 µm. This study shows the feasibility of realizing color selectivity less than 1 µm, which can achieve color selectivity in thin film and contribute organic image sensor in the near future. |
| 저자 |
김수관1, 박성민2, 강민균3, Deepan Kumar Neethipathi3, 손혜정2, 정대성3
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| 소속 |
1대구경북과하기술원, 2KIST, 3대구경북과학기술원 |
| 키워드 |
Charge-accumulation; Color selectivity; Charge collection narrowing (CCN); Space charge carrier
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| E-Mail |
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