| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 가을 (10/20 ~ 10/22, 경주컨벤션센터) |
| 권호 |
46권 2호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ,Ⅱ |
| 제목 |
Switchable Junction Organic Photodiode based on Light-Intensity-Dependent Molecular Switch |
| 초록 |
A strategy to artificially widen linear dynamic range (LDR) of organic photodiode (OPD) by introducing a light-intensity-dependent transition of its operation mode, such that low saturation photocurrent can be overcome, is proposed. The active layer of OPD is doped with a strategically designed and synthesized molecular switch (1,2-bis-[2-methyl-5-(4-cyanobiphenyl)-3-thienyl]tetrafluorobenzene; DAB) and the resulting OPD shows typical OPD performances with an external quantum efficiency (EQE) ＜ 100% under low-intensity light illumination but shows photomultiplication behaviors with an EQE ＞ 100% under high-enough-intensity light illumination, resulting in artificially extended LDR up to 225 dB. Such a unique and reversible transition of operation mode by light intensity self-recognition of molecular-switch-embedded OPD can be explained by unbalanced quantum yield of photocyclization/photocycloreversion of molecular switch. |
| 저자 |
강민균1, Syed Zahid Hassan1, 고성민2, 최창원3, Santosh Kumar Reddy Parumala4, 장윤희3, 윤진환4, 지동우2, 정대성1
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| 소속 |
1포항공과대, 2아주대, 3대구경북과학기술원, 4부산대 |
| 키워드 |
Organic photodiode; molecular switch
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| E-Mail |
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