title: Ultrahigh-Responsivity Photodetectors from Perovskite Nanowire Arrays for Sequentially Tunable Spectral Measurement.
abstract: Compared with polycrystalline films, single-crystalline methylammonium lead halide (MAPbX3, X = halogen) perovskite nanowires (NWs) with well-defined structure possess superior optoelectronic properties for optoelectronic applications. However, most of the prepared perovskite NWs exhibit properties below expectations due to poor crystalline quality and rough surfaces. It also remains a challenge to achieve aligned growth of single-crystalline perovskite NWs for integrated device applications. Here, we report a facile fluid-guided antisolvent vapor-assisted crystallization (FGAVC) method for large-scale fabrication of high-quality single-crystalline MAPb(I1-xBrx)3(x = 0, 0.1, 0.2, 0.3, 0.4) NW arrays. The resultant perovskite NWs showed smooth surfaces due to slow crystallization process and moisture-isolated growth environment. Significantly, photodetectors made from the NW arrays exhibited outstanding performance in respect of ultrahigh responsivity of 12 500 A W-1, broad linear dynamic rang (LDR) of 150 dB, and robust stability. The responsivity represents the best value ever reported for perovskite-based photodetectors. Moreover, the spectral response of the MAPb(I1-xBrx)3NW arrays could be sequentially tuned by varying the content of x = 0-0.4. On the basis of this feature, the NW arrays were monolithically integrated to form a unique system for directly measuring light wavelength. Our work would open a new avenue for the fabrication of high-performance, integrated optoelectronic devices from the perovskite NW arrays.
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Wei
authors.identifier: 0000-0002-0067-0624
authors.initials: W
authors.lastname: Deng
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Liming
authors.initials: L
authors.lastname: Huang
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Xiuzhen
authors.initials: X
authors.lastname: Xu
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Xiujuan
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Xiangcheng
authors.initials: X
authors.lastname: Jin
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Shuit-Tong
authors.identifier: 0000-0003-1238-9802
authors.initials: ST
authors.lastname: Lee
authors.affiliation: Institute of Functional Nano and Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology (NANO-CIC), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University , Suzhou Jiangsu 215123, People's Republic of China.
authors.forename: Jiansheng
authors.initials: J
authors.lastname: Jie
keywords: Methylammonium lead halide perovskite; light wavelength measurement; photodetectors; single-crystalline nanowire arrays