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Lasing in Robust Cesium Lead Halide Perovskite Nanowires

Lasing in Robust Cesium Lead Halide Perovskite NanowiresPower-dependent emission spectra from a CsPbBr3 nanowire. Narrow emission peaks at approximately 530 nm are indicative of lasing. Inset: A CsPbBr3 nanowire excited past the lasing threshold by a femtosecond pulsed laser.

Scientific Achievement
Achieved stable, high performance lasing in perovskite-based cesium lead halide nanowires (NWs).

Significance and Impact
These NW lasers demonstrate improved stability compared to other perovskite-based NW lasers while offering comparable performance, facile synthesis, and lasing wavelength tunability.

Research Details

  • Single crystalline cesium lead halide (CsPbX3, X = Cl, Br) NWs were grown at near-ambient conditions and found to act as high quality optical resonators.
  • Lasing occurs in CsPbBr3 NWs at 530 nm with a low lasing threshold of 5 μJ cm-2.
  • NWs are stable for weeks under ambient conditions and over 109 excitation cycles under lasing conditions.
  • Lasing was also observed in CsPbBr3 nano-plates as well as in CsPbCl3 NWs at 420 nm.

S. W. Eaton, M. Lai, N. A. Gibson, A. B. Wong, L. Dou, J. Ma, L.-W. Wang, S. R. Leone, P. Yang, "Lasing in robust cesium lead halide perovskite nanowires." Proc. Natl. Acad. Sci. USA (2016) DOI: 10.1073/pnas.1600789113