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Hybrid Organic/PbS Quantum Dot Bilayer Photodetector with Low Dark Current and High Detectivity
Author(s) -
Wei Yuanzhi,
Ren Zhenwei,
Zhang Andong,
Mao Peng,
Li Hui,
Zhong Xinhua,
Li Weiwei,
Yang Shiyong,
Wang Jizheng
Publication year - 2018
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201706690
Subject(s) - materials science , dark current , photocurrent , photodetector , optoelectronics , bilayer , lead sulfide , quantum dot , organic semiconductor , substrate (aquarium) , flexibility (engineering) , nanotechnology , polyimide , fabrication , layer (electronics) , membrane , biology , genetics , medicine , oceanography , statistics , mathematics , alternative medicine , pathology , geology
Owing to their ease of fabrication, low cost, and high flexibility, organic materials have attracted great interests in photodetector (PD) applications. However, suffering from large dark current, small photocurrent, low on–off ratio, and low sensitivity, performances of bare organic‐based PDs are not satisfactory. Integrating organic materials with other novel semiconductor materials offers an opportunity to overcome these drawbacks. Here, a lateral hybrid organic/lead sulfide (PbS) quantum dot bilayer PD is designed and fabricated, which significantly suppresses the dark current and enhances the photocurrent, leading to improved light detecting capability. Meanwhile, the bilayer PD can be made on a flexible polyimide substrate.