Nano Research

, Volume 10, Issue 4, pp 1107–1114

Structural, optical, and electrical properties of phase-controlled cesium lead iodide nanowires

  • Minliang Lai
  • Qiao Kong
  • Connor G. Bischak
  • Yi Yu
  • Letian Dou
  • Samuel W. Eaton
  • Naomi S. Ginsberg
  • Peidong Yang
Research Article

DOI: 10.1007/s12274-016-1415-0

Cite this article as:
Lai, M., Kong, Q., Bischak, C.G. et al. Nano Res. (2017) 10: 1107. doi:10.1007/s12274-016-1415-0

Abstract

Cesium lead iodide (CsPbI3), in its black perovskite phase, has a suitable bandgap and high quantum efficiency for photovoltaic applications. However, CsPbI3 tends to crystalize into a yellow non-perovskite phase, which has poor optoelectronic properties, at room temperature. Therefore, controlling the phase transition in CsPbI3 is critical for practical application of this material. Here we report a systematic study of the phase transition of one-dimensional CsPbI3 nanowires and their corresponding structural, optical, and electrical properties. We show the formation of perovskite black phase CsPbI3 nanowires from the non-perovskite yellow phase through rapid thermal quenching. Post-transformed black phase CsPbI3 nanowires exhibit increased photoluminescence emission intensity with a shrinking of the bandgap from 2.78 to 1.76 eV. The perovskite nanowires were photoconductive and showed a fast photoresponse and excellent stability at room temperature. These promising optical and electrical properties make the perovskite CsPbI3 nanowires attractive for a variety of nanoscale optoelectronic devices.

Keywords

inorganic halide perovskite CsPbI3 phase transition stability 

Supplementary material

12274_2016_1415_MOESM1_ESM.pdf (2.4 mb)
Structural, optical, and electrical properties of phase-controlled cesium lead iodide nanowires

Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  • Minliang Lai
    • 1
  • Qiao Kong
    • 1
  • Connor G. Bischak
    • 1
  • Yi Yu
    • 1
    • 2
  • Letian Dou
    • 1
    • 2
  • Samuel W. Eaton
    • 1
  • Naomi S. Ginsberg
    • 1
    • 2
    • 3
    • 4
    • 5
  • Peidong Yang
    • 1
    • 2
    • 3
    • 6
  1. 1.Department of ChemistryUniversity of CaliforniaBerkeleyUSA
  2. 2.Materials Sciences DivisionLawrence Berkeley National LaboratoryBerkeleyUSA
  3. 3.Kavli Energy Nanosciences InstituteBerkeleyUSA
  4. 4.Molecular Biophysics and Integrative Bioimaging DivisionLawrence Berkeley National LaboratoryBerkeleyUSA
  5. 5.Department of PhysicsUniversity of CaliforniaBerkeleyUSA
  6. 6.Department of Materials Science and EngineeringUniversity of CaliforniaBerkeleyUSA

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