title: Solution-Processed Tin-Based Perovskite for Near-Infrared Lasing.
abstract: The family of solution-processed tin-based perovskites is demonstrated as a new and superior near-infrared gain medium. Due to the large electron-hole bimolecular recombination associated with tin and the reduced trap density with SnF2treatment, these lead-free "green" perovskites yield stable coherent light emission extending to ≈1 μm at strikingly low thresholds.
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
authors.forename: Guichuan
authors.initials: G
authors.lastname: Xing
authors.affiliation: Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore.|School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Mulmudi Hemant
authors.initials: MH
authors.lastname: Kumar
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
authors.forename: Wee Kiang
authors.initials: WK
authors.lastname: Chong
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
authors.forename: Xinfeng
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Yao
authors.initials: Y
authors.lastname: Cai
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Hong
authors.initials: H
authors.lastname: Ding
authors.affiliation: Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Mark
authors.initials: M
authors.lastname: Asta
authors.affiliation: Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore.|Laboratory of Photonics and Interfaces, Department of Chemistry and Chemical Engineering, Swiss Federal Institute of Technology, Station 6, CH-1015 Lausanne, Switzerland.|Department of Materials Science and Engineering, University of California, Berkeley, CA, 94720, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Grätzel
authors.affiliation: Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore.|School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore.
authors.forename: Subodh
authors.initials: S
authors.lastname: Mhaisalkar
authors.affiliation: Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore. nripan@ntu.edu.sg.|School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore. nripan@ntu.edu.sg.
authors.forename: Nripan
authors.initials: N
authors.lastname: Mathews
authors.affiliation: Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore. tzechien@ntu.edu.sg.
authors.forename: Tze Chien
authors.initials: TC
authors.lastname: Sum
keywords: bimolecular recombination; light-emitting diodes; near-infrared lasing; perovskites; trap-states engineering; ultrafast spectroscopy