Rutile Nanorod/Anatase Nanowire Junction Array as Both Sensor and Power Supplier for High‐Performance,Self‐Powered,Wireless UV Photodetector |
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| Authors: | Xin Yu Zhenhuan Zhao Jian Zhang Weibo Guo Jichuan Qiu Deshuai Li Zhou Li Xiaoning Mou Linlin Li Aixue Li Hong Liu |
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| Affiliation: | 1. Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, National Center for Nanoscienceand Technology (NCNST), Beijing, P. R. China;2. University of Chinese Academy of Science, Beijing, P. R. China;3. State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China |
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| Abstract: | Self‐powered UV photodetectors based on TiO2 nanotree arrays have captured much attention in recent years because of their many advantages. In this work, rutile/anatase TiO2 (R/A‐TiO2) heterostructured nanotree arrays are fabricated by assembling anatase nanowires as branches on rutile nanorods. External quantum efficiencies as high as 90% are reached at 325 nm. These high quantum efficiencies are related to the higher amount of light harvesting due to the larger surface area, the better separation ability of the photogenerated carriers by the rutile/anatase heterostructure, and the faster electron transport, related to the 1D nanostructure and lattice connection at the interface of the two kinds of TiO2. Furthermore, a self‐powered wireless UV photodetector is shown with excellent wireless detection performance. Such devices will enable significant advances for next‐generation photodetection and photosensing applications. |
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| Keywords: | junctions photodetectors self‐powered systems sensors wireless transport |
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