PCE10 Significantly Improves Red and Near-infrared Light Detection Capabilities of Ternary Photomultiplication-type Organic Photodetectors

被引：0
|
作者：
Wang J. [1 ]
Tang X. [2 ]
Zhou B. [1 ]
Zeng X. [1 ]
Li J. [1 ]
Zhou Y. [1 ]
机构：
[1] College of Physics & Electronics Information Engineering, Minjiang University, Fuzhou
[2] College of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing
来源：
Faguang Xuebao/Chinese Journal of Luminescence | 2023年 / 44卷 / 12期
关键词：
blood oxygen saturation; bulk-heterojunction; heart rate; near-infrared; photomultiplication-type organic photodetector; ternary;
D O I：
10.37188/CJL.20230257
中图分类号：
学科分类号：
摘要：
Photodetectors with strong near-infrared response are more conducive to detecting human heart rate. Furthermore，broadband photodetectors with a response range covering both red and near-infrared region can be used to detect blood oxygen saturation. Therefore，improving the red and near-infrared response capabilities of broadband photodetectors is of great significance. However，classic binary bulk-heterojunction broadband photomultiplication-type organic photodetectors typically exhibit weak or even no response to red and near-infrared light due to significant ratio-difference between donor and acceptor in the active layer. This paper fabricates ternary bulk-heterojunction photomultiplication-type organic photodetectors with a structure of ITO/PEDOT∶PSS/P3HT∶PCE10∶IEICO-4F（90∶10∶ 1）/Al by using a small amount of donor material PCE10 to replace some of P3HT in the active layer of P3HT∶IEICO-4F（100∶1）. Under -20 V bias，the ternary devices obtain a relatively even EQE spectrum from ultraviolet to near-infrared（330-810 nm），with the EQEs at 660 nm and 810 nm（134000% and 147000%）being 78 and 106 times as large as those of the binary devices under same conditions，and corresponding detectivity values（5. 4×1013 Jones and 7. 27×1013 Jones）being increased by 26 and 36 times，respectively. The red and near-infrared light detection capabilities of ternary devices have been significantly improved，providing a strategy for fabricating high-performance photodetectors to detect human heart rate and blood oxygen saturation. © 2023 Chines Academy of Sciences. All rights reserved.
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页码：2222 / 2230
页数：8
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