title: Wafer-scale growth of large arrays of perovskite microplate crystals for functional electronics and optoelectronics.
abstract: Methylammonium lead iodide perovskite has attracted intensive interest for its diverse optoelectronic applications. However, most studies to date have been limited to bulk thin films that are difficult to implement for integrated device arrays because of their incompatibility with typical lithography processes. We report the first patterned growth of regular arrays of perovskite microplate crystals for functional electronics and optoelectronics. We show that large arrays of lead iodide microplates can be grown from an aqueous solution through a seeded growth process and can be further intercalated with methylammonium iodide to produce perovskite crystals. Structural and optical characterizations demonstrate that the resulting materials display excellent crystalline quality and optical properties. We further show that perovskite crystals can be selectively grown on prepatterned electrode arrays to create independently addressable photodetector arrays and functional field effect transistors. The ability to grow perovskite microplates and to precisely place them at specific locations offers a new material platform for the fundamental investigation of the electronic and optical properties of perovskite materials and opens a pathway for integrated electronic and optoelectronic systems.
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA. ; California Nanosystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Gongming
authors.initials: G
authors.lastname: Wang
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Dehui
authors.initials: D
authors.lastname: Li
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Hung-Chieh
authors.initials: HC
authors.lastname: Cheng
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Yongjia
authors.initials: Y
authors.lastname: Li
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Chih-Yen
authors.initials: CY
authors.lastname: Chen
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Anxiang
authors.initials: A
authors.lastname: Yin
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Zipeng
authors.initials: Z
authors.lastname: Zhao
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Zhaoyang
authors.initials: Z
authors.lastname: Lin
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Hao
authors.initials: H
authors.lastname: Wu
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Qiyuan
authors.initials: Q
authors.lastname: He
authors.affiliation: California Nanosystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA. ; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Mengning
authors.initials: M
authors.lastname: Ding
authors.affiliation: Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: California Nanosystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA. ; Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Yu
authors.initials: Y
authors.lastname: Huang
authors.affiliation: Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA. ; California Nanosystems Institute, University of California, Los Angeles, Los Angeles, CA 90095, USA.
authors.forename: Xiangfeng
authors.initials: X
authors.lastname: Duan
keywords: Crystal Growth; Electronics; Large Array; Mobility; Optoelectronics; Perovskite; Photodetectors; Transistors