Enhancing Specific Detectivity and Device Stability in Vacuum-Deposited Organic Photodetectors Utilizing Nonfullerene Acceptors

doi:10.1021/acsami.4c10792

淡江大學機構典藏 > 理學院 > 化學學系暨研究所 > 期刊論文 > Item 987654321/126611

Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/126611

Title:	Enhancing Specific Detectivity and Device Stability in Vacuum-Deposited Organic Photodetectors Utilizing Nonfullerene Acceptors
Authors:	Septian, M. Rivaldi Ali;Estrada, Richie;Lee, Chih-Chien;Iskandar, Johan;Amin, Nurul Ridho Al;Liman, Johansah;Harsono, Budi;Sutanto, Kevin;Yeh, Ping-Chung;Chen, Chih-Hsin;Liu, Shun-Wei
Date:	2024-08-31
Issue Date:	2024-12-24 12:05:25 (UTC+8)
Publisher:	American Chemical Society
Abstract:	Organic photodetector (OPD) studies have undergone a revolutionary transformation by introducing nonfullerene acceptors (NFAs), which provide substantial benefits such as tunable band gaps and enhanced absorption in the visible spectrum. Vacuum-processed small-molecule-based OPD devices are presented in this study by utilizing a blend of boron subphthalocyanine (SubPc) and chlorinated subphthalocyanine (Cl6SubPc) as the active layer. Four different active layer thicknesses are further investigated to understand the intrinsic phenomena, unveiling the suppression of dark current density while maintaining photoexcitation and charge separation efficiency. Experimental results reveal that, at an applied bias of −3 V, the 50-nm-thick active layer achieves a remarkably low dark current density of 1.002 nA cm–2 alongside a high external quantum efficiency (EQE) of 52.932% and a responsivity of 0.226 A W–1. These impressive performance metrics lead to a specific detectivity of 1.263 × 1013 Jones. Furthermore, the findings offer new insights into intrinsic phenomena within the bulk heterojunction (BHJ), such as thermally generated current and exciton quenching. This integration is potentially well-heeled to revolutionize display technology by combining high-sensitivity photodetection, offering new possibilities for novel display panels with sensing applications.
Relation:	ACS Appl. Mater. Interfaces 2024, 16, 48034−48042.
DOI:	10.1021/acsami.4c10792
Appears in Collections:	[化學學系暨研究所] 期刊論文

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