光电探测器
响应度
异质结
范德瓦尔斯力
材料科学
光电子学
噪音(视频)
相(物质)
物理
计算机科学
分子
量子力学
图像(数学)
人工智能
作者
Meiyu He,Jiayue Han,Chunyu Li,Chao Han,Xingwei Han,Xiaoyang Du,Hanwen Luo,He Yu,Jun Gou,Yuanlin Shi,Jun Wang
标识
DOI:10.1002/lpor.202400554
摘要
Abstract One of the main challenges most organic photodiodes (OPDs) facing is to overcome the traditional trade‐off between ultralow dark current and high responsivity (R) in existing research. Here, van der Waals multilayer OPD based on water transfer printing method, termed hybrid bulk‐heterojunction (BHJ)/planar‐heterojunction (PHJ) (B‐PHJ) framework, is constructed making certain the high‐quality interface and novel two‐phase energy band alignment between the active and barrier layer with noise suppression and photovoltaic complement simultaneously. The prepared OPD exhibits the combined advantages of ultralow dark current (0.2 nA cm −2 at −1 V) and high responsivity (0.49 A W −1 at 850 nm). As a result, these superimposed effects enable the device to feature a superior liner dynamic range (LDR) of 210 dB and a specific detectivity of 10 14 Jones to address the conventional responsivity‐noise trade‐off. The results reveal that the balance dynamics of charge transfer and charge blocking in van der Waals hybrid two‐phase framework OPD, may inspire the development of next OPDs. Finally, its diverse practical application potential is demonstrated through long‐distance misaligned photoplethysmography (PPG) measurement.
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