| 학회 |
한국고분자학회 |
| 학술대회 |
2022년 봄 (04/06 ~ 04/08, 대전컨벤션센터) |
| 권호 |
47권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Image Capture Against Strong Backlight Using Molecular-Switch-Embedded Organic Photodiode |
| 초록 |
The photocurrent of organic photodiodes (OPDs) exhibits early saturation under increased incident light intensities. Consequently, OPDs cannot easily detect objects against strong backlight, for example, sunlight. We address this problem by introducing a light-intensity-dependent transition of the operation mode. In particular, when the incident light intensity passes a threshold intensity, the operation mode of the OPD autonomously changes to overcome early photocurrent saturation. The photoactive layer is doped with a strategically designed and synthesized molecular switch (1,2-bis-(2-methyl-5-(4-cyanobiphenyl)-3-thienyl)tetrafluorobenzene; DAB). The suggested OPD exhibits a typical performance with an external quantum efficiency (EQE) ＜ 100% under low-intensity light illumination and a photomultiplication behavior with an EQE ＞ 100% under high-intensity light illumination, resulting in the extension of the photoresponse linearity to a light intensity of 434 mW cm−2. |
| 저자 |
강민균1, 고성민2, 최창원3, 김윤희4, 장윤희3, 윤진환5, 지동우2, 정대성1
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| 소속 |
1포항공과대, 2아주대, 3대구경북과학기술원, 4경상국립대, 5부산대 |
| 키워드 |
organic photodiode; molecular switch; diarylethene; linear dynamic range; image sensor
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| E-Mail |
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