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30 November 2023 Photomultiplication-type organic phototransistors: achieving high photosensitivity by suppressing dark current
Sanghoon Park, Dongho Choi, Haechang Lee, Hanul Moon, Seunghyup Yoo
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Proceedings Volume PC12662, Organic and Hybrid Transistors XXII; PC126620H (2023) https://doi.org/10.1117/12.2676694
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States
Abstract
Organic phototransistors (OPTs) are promising flexible photodetectors, but it is challenging to achieve high photosensitivity due to their intrinsic on-state current regardless of lighting conditions. In this study, photomultiplication-type organic phototransistors (PM-OPTs) are developed to suppress a dark current while producing a large photocurrent. A thin blocking layer is inserted between the source/drain electrodes and the active layer to induce a photomultiplication effect. The proposed PM-OPTs show two orders of magnitude larger photosensitivity whereas 100 times less power consumption in dark compared to conventional OPTs. We believe the proposed devices are suitable for realizing accurate and energy-efficient wearable bio-signal sensors.
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(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Sanghoon Park, Dongho Choi, Haechang Lee, Hanul Moon, and Seunghyup Yoo "Photomultiplication-type organic phototransistors: achieving high photosensitivity by suppressing dark current", Proc. SPIE PC12662, Organic and Hybrid Transistors XXII, PC126620H (30 November 2023); https://doi.org/10.1117/12.2676694
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KEYWORDS
Phototransistors
Dark current
Photomultipliers
Biosensors
Electrodes
Electrons
Organic photodetectors
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