Статья

A Highly Stable Organic–Inorganic Hybrid Electron Transport Layer for Ultraflexible Organic Photodiodes

Theodorus Jonathan WijayaDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanSixing XiongRIKEN Center for Emergent Matter Science (CEMS) 2‐1 Hirosawa Wako Saitama 351‐0198 JapanKosei SasakiDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanYutaro KatoDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanKazuma MoriDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanMari KoizumiDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanSunghoon LeeDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanMasaki KobayashiCenter for Spintronics Research Network The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanYinhua ZhouWuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 ChinaKenjiro FukudaRIKEN Center for Emergent Matter Science (CEMS) 2‐1 Hirosawa Wako Saitama 351‐0198 JapanTomoyuki YokotaDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 JapanTakao SomeyaDepartment of Electrical Engineering and Information Systems Graduate School of Engineering The University of Tokyo 7‐3‐1 Hongo Bunkyo‐ku Tokyo 113‐8656 Japan

2025en

ABI

Аннотация

Flexible organic photodiodes (OPDs) are used to detect light in system-scale demonstrations of skin-conformable devices. However, the detectivity of OPDs deteriorates under various environmental conditions, such as light irradiation, air exposure, and heating. This decrease in detectivity is observed in OPDs with a widely used sol-gel ZnO (ZnO SG) electron transport layer (ETL), where the dark current at the reverse bias increased by several orders of magnitude. In this study, a low dark current and stable detectivity with respect to the aforementioned external changes are achieved. The enhanced stability stems from the suppression of the increase in dark current realized by using a mixture of an organic polymer, polyethyleneimine (PEIE), and inorganic crystals (ZnO nanoparticles) to create a nanoparticle-based, Zn-chelated PEIE (PEI-Zn NP) as the ETL of the OPDs. The detectivities of OPDs with PEI-Zn NP are 89%, 84%, and 93% of their original values after light irradiation, air storage, and thermal heating, respectively. In contrast, their ZnO SG counterparts exhibited stabilities of only 9.9%, 55%, and 2.6%, respectively, in the same tests. Furthermore, the use of PEI-Zn NP ETL in ultraflexible OPDs is demonstrated by the maintained detectivity after 5000 cycles of device bending.

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Идентификаторы

DOI: 10.1002/adma.202501951

Цитирования и источники

Цитирований: 2Использованных источников: 0

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