Affiliation:
1. Department of Applied Physics, Photonic Research Institute The Hong Kong Polytechnic University Hung Hom Hong Kong Kowloon P. R. China
2. Department of Materials Science and Engineering City University of Hong Kong Hong Kong Kowloon P. R. China
3. Department of Electrical and Computer Engineering University of California San Diego La Jolla CA 92093 USA
Abstract
AbstractThe demand for high‐performance polarization‐sensitive perovskite photodetectors (PSPPDs) has driven research to develop new materials that enable efficient light harvesting and polarization detection. Herein, a PSPPD based on nanoimprinted quasi‐2D halide perovskite thin films with vertical gradient phase distribution is reported. The nanoimprinting method is utilized to create nanoscale linear patterns on the surface of the film. It enables polarized light detection and enhances absorption. According to the results of transient absorption analysis, a vertical gradient phase distribution along the longitudinal direction of quasi‐2D perovskite (PEA)2(MA)n‐1PbnI3n+1 (PEA+ = C6H5CH2CH2NH3+, MA+ = CH3NH3+, n = 3) is confirmed, which facilitates efficient carrier transfer and separation, leading to improved device performance. These PSPPDs demonstrate outstanding photo‐response with a large responsivity of ≈90 A W−1 and a high detectivity reaching the order of 1012 Jones. The photoluminescence of the quasi‐2D perovskite film exhibits an anisotropy ratio of 2.05, and the PSPPD reaches a polarization sensitivity of 1.68. These findings offer insight into the feasibility of developing perovskite materials for PSPPDs, which have potential applications in imaging, sensing, and communication technologies.
Funder
Hong Kong Polytechnic University
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献