title: An Origami Perovskite Photodetector with Spatial Recognition Ability.
abstract: Flexible photodetectors are attracting substantial attention because of their promising applications in bendable display and smart clothes which cannot be fulfilled by the existing rigid counterparts. In this work, we demonstrate a newly designed photodetector constructed on the common printing paper. Pencil trace was applied as the graphite electrode. With such a simple and convenient method, the as-prepared photodetector exhibited a satisfactory responsivity of 4.4 mA/W, on/off current ratio of 32, coupled with a high response speed of <10 ms. It also demonstrated excellent mechanical flexibility and durability. Most inspiringly, by an ingenious origami, we created the first perovskite photodetector with a 3D configuration. The cubic photodetector array displayed an excellent spatial recognition ability which could not be achieved in all the previously reported 2D photodetectors. Such a fusion of materials science and the art of origami provides a robust strategy for the design of low-cost flexible electronics, especially for the applications in 3D configurations.
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Huajing
authors.initials: H
authors.lastname: Fang
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Jiangwei
authors.initials: J
authors.lastname: Li
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Jie
authors.initials: J
authors.lastname: Ding
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Yue
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Li
authors.affiliation: Collaborative Innovation Center of Quantum Matter, State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University , Beijing, 100084, China.
authors.forename: Jia-Lin
authors.initials: JL
authors.lastname: Sun
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Liduo
authors.initials: L
authors.lastname: Wang
authors.affiliation: Department of Chemistry, Tsinghua University , Beijing, 100084, China.
authors.forename: Qingfeng
authors.identifier: http://orcid.org/0000-0002-5084-6886
authors.initials: Q
authors.lastname: Yan
keywords: 3D; flexible photodetector; origami; paper electronics; perovskite