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Self‐Powered Colloidal Wurtzite‐Structure Quantum Dots Photodetectors Based On Photoinduced‐Pyroelectric Effect
Author(s) -
Jin Lufan,
Zhang Yating,
Yu Yu,
Chen Zhiliang,
Li Yifan,
Cao Mingxuan,
Che Yongli,
Yao Jianquan
Publication year - 2018
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201800639
Subject(s) - photodetector , materials science , pyroelectricity , wurtzite crystal structure , optoelectronics , quantum dot , specific detectivity , dark current , ferroelectricity , zinc , dielectric , metallurgy
Colloidal wurtzite‐structure CdSe/ZnS quantum dots (CWQDs), with noncentral asymmetry structure and spontaneous polarization, have an extensive potential for applications based on the pyroelectric effect, such as energy harvestors, self‐powered nanogenerators, and photosensors. Here, a low‐cost, easy‐fabrication, and high‐speed self‐powered photodetector is demonstrated, which performs independently without any external power source. The response of the device caused by the photoinduced‐pyroelectric effect is experimentally investigated based on the Au/CWQDs/Au edge‐electrodes structure, which exhibits an ultrafast photoresponse with a rising time of 20.6 µs and a falling time of 30.1 µs. Moreover, the frequency and temperature dependence of the device also is investigated under zero bias. This work provides a new approach to achieve self‐powered photodetectors, which may show promise for extensive batch applications, such as wireless sensing, optothermal detection, optoelectronic communication, and energy harvesting.