Abstract
An ultraviolet (UV)-visible tunable photodetector based on ZnO nanorod arrays (NAs)/perovskite heterojunction solar cell structures is presented, in which the ZnO NAs are prepared using the hydrothermal method and annealed in different atmospheres. Based on solar cell structure perovskite photodetectors, it exhibited highly repeatable and stable photoelectric response characteristics. In addition, the devices with ZnO NAs annealed in a vacuum showed a high responsivity of about 1014 cm Hz1/2 W−1 in the visible region, whereas the devices with ZnO NAs annealed in air exhibited good detectivity in the UV region, especially at around 350 nm. Furthermore, when the annealing atmosphere of the ZnO nanorods was changed from vacuum to air, the dominant detection region of the photodetectors was altered from the visible to the ultraviolet region. These results enable potential applications of the ZnO NAs/perovskite photodetectors in ultraviolet and visible regions.
摘要
本文报道了一种基于ZnO纳米棒阵列/钙钛矿电池结构的紫外-可见可调的光电探测器, 其中ZnO纳米棒阵列采用水热法制备并在不同气氛下退火. 基于电池结构的钙钛矿光电探测器具有较好的光电响应重复性和稳定性. ZnO纳米棒阵列真空退火的器件在可见光区域达到了1014 Jones的响应度, 而ZnO纳米棒阵列在空气中退火的器件在紫外光区域, 尤其在365 nm处有较好的探测性能. 进一步研究发现, 通过不同氛围退火, 实现了紫外-可见可调的光电探测性能. 以上结果表明ZnO纳米棒阵列/钙钛矿光电探测器在紫外和可见光区域存在潜在应用.
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This work is supported by the National Nature Science Foundation of China (51372075).
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Mengni Xue received her bachelor’s degree in Science fromWuhan Institute of Technology,Wuhan, China. She is currently a graduate student in the Faculty of Physics and Electronic Science, Hubei University, Wuhan, China. Her main research areas include photodetectors and photoelectric devices based on perovskite materials.
Hai Zhou received his MSc and PhD degrees in Microelectronics and Solid State Electronics from Wuhan University, Wuhan, China. He is currently an associate professor of Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Hubei Key Laboratory of Ferroelectric and Dielectric Materials and Devices, the Faculty of Physics and Electronic Science, Hubei University, Wuhan, China. His main research areas include self-power photodetectors, ultraviolet LEDs devices, and photoelectric devices based on perovskite materials.
Hao Wang is a Chair Professor of the Faculty of Hubei University. He received his PhD degree from Huazhong University of Science and Technology in 1994. He is a visiting professor of the University of Cambridge and Aalto University. He has published more than 150 peer reviewed papers (such as Adv. EnergyMater., ACS Nano, Nano Energy) and held 18 patents. His research interests involve solar cells, fuel cells, non-volatile memory, photodetectors and magnetic nanostructures.
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Xue, M., Zhou, H., Xu, Y. et al. High-performance ultraviolet-visible tunable perovskite photodetector based on solar cell structure. Sci. China Mater. 60, 407–414 (2017). https://doi.org/10.1007/s40843-017-9028-y
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DOI: https://doi.org/10.1007/s40843-017-9028-y