title: Periodic Organic-Inorganic Halide Perovskite Microplatelet Arrays on Silicon Substrates for Room-Temperature Lasing.
abstract: Organic-inorganic metal halide perovskites have recently demonstrated outstanding efficiencies in photovoltaics as well as highly promising performances for a wide range of optoelectronic applications such as lasing, light emission, optical detectors, and even for radiation detection. Key to the realization of functional perovskite micro/nanosystems on the ubiquitous silicon optoelectronics platform is through sophisticated lithography. Despite the rapid progress made in halide perovskite lasing, direct lithographic patterning of perovskite films to form optical cavities on conventional substrates remains extremely challenging. This study realizes room-temperature high-quality factor whispering-gallery-mode lasing (Q≈ 1210) from patterned lead halide perovskite microplatelets fabricated in periodic arrays on silicon substrate with micropatterned BN film as the buffer layer. By varying the size of the platelets, modal selectivity for single mode lasing can be achieved with different cavity sizes or by simply breaking the structural symmetry of the cavity through designing the pattern. Importantly, this work demonstrates a straightforward, versatile bottom-up scalable strategy to realize high-quality periodic perovskite arrays with variable cavity sizes for large-area light-emitting and optical gain applications.
authors.affiliation: CAS Center for Excellence in Nanoscience and CAS Key Laboratory of Standardization and Measurement for Nanotechnology National Center for Nanoscience and Technology Beijing 100190 P.R. China; Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore.
authors.forename: Xinfeng
authors.initials: X
authors.lastname: Liu
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Lin
authors.initials: L
authors.lastname: Niu
authors.affiliation: State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 P.R. China.
authors.forename: Chunyang
authors.initials: C
authors.lastname: Wu
authors.affiliation: Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore.
authors.forename: Chunxiao
authors.initials: C
authors.lastname: Cong
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Hong
authors.initials: H
authors.lastname: Wang
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Qingsheng
authors.initials: Q
authors.lastname: Zeng
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Haiyong
authors.initials: H
authors.lastname: He
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Qundong
authors.initials: Q
authors.lastname: Fu
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Wei
authors.initials: W
authors.lastname: Fu
authors.affiliation: Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore.
authors.forename: Ting
authors.initials: T
authors.lastname: Yu
authors.affiliation: State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 P.R. China.
authors.forename: Chuanhong
authors.initials: C
authors.lastname: Jin
authors.affiliation: Center for Programmable Materials School of Materials Science & Engineering Nanyang Technological University Singapore 639798 Singapore; NOVITAS Nanoelectronics Centre of Excellence School of Electrical and Electronic Engineering Nanyang Technological University Singapore 639798 Singapore.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore; Energy Research Institute @ NTU (ERI@N) Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore.
authors.forename: Tze Chien
authors.initials: TC
authors.lastname: Sum
keywords: BN; array; lead halide perovskite; single mode laser; whispering‐gallery‐mode