title: Ultrafast Solar-Blind Ultraviolet Detection by Inorganic Perovskite CsPbX3Quantum Dots Radial Junction Architecture.
abstract: Inorganic CsPbX3(X = Cl, Br, I, or hybrid among them) perovskite quantum dots (IPQDs) are promising building blocks for exploring high performance optoelectronic applications. In this work, the authors report a new hybrid structure that marries CsPbX3IPQDs to silicon nanowires (SiNWs) radial junction structures to achieve ultrafast and highly sensitive ultraviolet (UV) detection in solar-blind spectrum. A compact and uniform deployment of CsPbX3IPQDs upon the sidewall of low-reflective 3D radial junctions enables a strong light field excitation and efficient down-conversion of the ultraviolet incidences, which are directly tailored into emission bands optimized for a rapid photodetection in surrounding ultrathin radial p-i-n junctions. A fast solar-blind UV detection has been demonstrated in this hybrid IPQD-NW detectors, with rise/fall response time scales of 0.48/1.03 ms and a high responsivity of 54 mA W-1@200 nm (or 32 mA W-1@270 nm), without the need of any external power supply. These results pave the way toward large area manufacturing of high performance Si-based perovskite UV detectors in a scalable and low-cost procedure.
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Jiawen
authors.initials: J
authors.lastname: Lu
authors.affiliation: Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210046, P. R. China.
authors.forename: Xuexi
authors.initials: X
authors.lastname: Sheng
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Tong
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Zhongwei
authors.initials: Z
authors.lastname: Yu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Sun
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Linwei
authors.initials: L
authors.lastname: Yu
authors.affiliation: Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210046, P. R. China.
authors.forename: Xiangxing
authors.initials: X
authors.lastname: Xu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Junzhuan
authors.initials: J
authors.lastname: Wang
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Xu
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Yi
authors.initials: Y
authors.lastname: Shi
authors.affiliation: National Laboratory of Solid State Microstructures, School of Electronics Science and Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, P. R. China.
authors.forename: Kunji
authors.initials: K
authors.lastname: Chen
keywords: down-conversion; perovskite CsPbX3 quantum dots; radial junctions; solar-blind detectors