title: Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors.
abstract: The remarkable performance of lead halide perovskites in solar cells can be attributed to the long carrier lifetimes and low non-radiative recombination rates, the same physical properties that are ideal for semiconductor lasers. Here, we show room-temperature and wavelength-tunable lasing from single-crystal lead halide perovskite nanowires with very low lasing thresholds (220 nJ cm(-2)) and high quality factors (Q ∼ 3,600). The lasing threshold corresponds to a charge carrier density as low as 1.5 × 10(16) cm(-3). Kinetic analysis based on time-resolved fluorescence reveals little charge carrier trapping in these single-crystal nanowires and gives estimated lasing quantum yields approaching 100%. Such lasing performance, coupled with the facile solution growth of single-crystal nanowires and the broad stoichiometry-dependent tunability of emission colour, makes lead halide perovskites ideal materials for the development of nanophotonics, in parallel with the rapid development in photovoltaics from the same materials.
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: Haiming
authors: H
authors: Zhu
authors: Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors: Yongping
authors: Y
authors: Fu
authors: Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors: Fei
authors: F
authors: Meng
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: Xiaoxi
authors: X
authors: Wu
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: Zizhou
authors: Z
authors: Gong
authors: Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors: Qi
authors: Q
authors: Ding
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: Martin V
authors: MV
authors: Gustafsson
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: M Tuan
authors: MT
authors: Trinh
authors: Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
authors: Song
authors: S
authors: Jin
authors: Department of Chemistry, Columbia University, New York, New York 10027, USA.
authors: X-Y
authors: XY
authors: Zhu