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Research Article

Lasing in robust cesium lead halide perovskite nanowires

Samuel W. Eaton, Minliang Lai, Natalie A. Gibson, Andrew B. Wong, Letian Dou, Jie Ma, Lin-Wang Wang, Stephen R. Leone, and Peidong Yang
PNAS February 23, 2016 113 (8) 1993-1998; first published February 9, 2016; https://doi.org/10.1073/pnas.1600789113
Samuel W. Eaton
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
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Minliang Lai
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
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Natalie A. Gibson
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
bChemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
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Andrew B. Wong
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
cMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
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Letian Dou
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
cMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
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Jie Ma
cMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
dJoint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
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Lin-Wang Wang
cMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
dJoint Center for Artificial Photosynthesis, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
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Stephen R. Leone
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
bChemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
eDepartment of Physics, University of California, Berkeley, CA 94720;
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  • For correspondence: srl@berkeley.edu p_yang@berkeley.edu
Peidong Yang
aDepartment of Chemistry, University of California, Berkeley, CA 94720;
cMaterials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720;
fKavli Energy NanoSciences Institute, Berkeley, CA 94720
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  • For correspondence: srl@berkeley.edu p_yang@berkeley.edu
  1. Contributed by Stephen R. Leone, January 19, 2016 (sent for review January 13, 2016; reviewed by Xiangfeng Duan and Edward H. Sargent)

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Significance

Nanowire lasers are miniaturized light sources with great potential for integration into optoelectronic circuits. Many of the current nanowire lasers either require extreme conditions for synthesis or suffer from poor operational stability. We synthesize nanowires of a promising set of compositions, the cesium lead halides, and accomplish this under near-ambient conditions. These nanowires act as efficient laser cavities and are capable of lasing with relatively low excitation thresholds. They also demonstrate unprecedented stability for a perovskite-based nanowire laser and offer a new nanoscale platform for future study.

Abstract

The rapidly growing field of nanoscale lasers can be advanced through the discovery of new, tunable light sources. The emission wavelength tunability demonstrated in perovskite materials is an attractive property for nanoscale lasers. Whereas organic–inorganic lead halide perovskite materials are known for their instability, cesium lead halides offer a robust alternative without sacrificing emission tunability or ease of synthesis. Here, we report the low-temperature, solution-phase growth of cesium lead halide nanowires exhibiting low-threshold lasing and high stability. The as-grown nanowires are single crystalline with well-formed facets, and act as high-quality laser cavities. The nanowires display excellent stability while stored and handled under ambient conditions over the course of weeks. Upon optical excitation, Fabry–Pérot lasing occurs in CsPbBr3 nanowires with an onset of 5 μJ cm−2 with the nanowire cavity displaying a maximum quality factor of 1,009 ± 5. Lasing under constant, pulsed excitation can be maintained for over 1 h, the equivalent of 109 excitation cycles, and lasing persists upon exposure to ambient atmosphere. Wavelength tunability in the green and blue regions of the spectrum in conjunction with excellent stability makes these nanowire lasers attractive for device fabrication.

  • nanowire
  • perovskite
  • laser
  • inorganic
  • stability

Footnotes

  • ↵1To whom correspondence may be addressed. Email: srl{at}berkeley.edu or p_yang{at}berkeley.edu.
  • Author contributions: S.W.E., M.L., N.A.G., A.B.W., J.M., L.-W.W., S.R.L., and P.Y. designed research; S.W.E., M.L., N.A.G., A.B.W., L.D., and J.M. performed research; S.W.E., M.L., N.A.G., A.B.W., J.M., and P.Y. analyzed data; and S.W.E., M.L., N.A.G., S.R.L., and P.Y. wrote the paper.

  • Reviewers: X.D., University of California, Los Angeles; and E.H.S., University of Toronto.

  • The authors declare no conflict of interest.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1600789113/-/DCSupplemental.

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Lasing in cesium lead halide perovskite nanowires
Samuel W. Eaton, Minliang Lai, Natalie A. Gibson, Andrew B. Wong, Letian Dou, Jie Ma, Lin-Wang Wang, Stephen R. Leone, Peidong Yang
Proceedings of the National Academy of Sciences Feb 2016, 113 (8) 1993-1998; DOI: 10.1073/pnas.1600789113

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Lasing in cesium lead halide perovskite nanowires
Samuel W. Eaton, Minliang Lai, Natalie A. Gibson, Andrew B. Wong, Letian Dou, Jie Ma, Lin-Wang Wang, Stephen R. Leone, Peidong Yang
Proceedings of the National Academy of Sciences Feb 2016, 113 (8) 1993-1998; DOI: 10.1073/pnas.1600789113
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