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Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals

Author

Listed:
  • Bernard Wenger

    (University of Oxford)

  • Pabitra K. Nayak

    (University of Oxford)

  • Xiaoming Wen

    (University of New South Wales
    Swinburne University of Technology)

  • Sameer V. Kesava

    (University of Oxford)

  • Nakita K. Noel

    (University of Oxford)

  • Henry J. Snaith

    (University of Oxford)

Abstract

Ultralow trap densities, exceptional optical and electronic properties have been reported for lead halide perovskites single crystals; however, ambiguities in basic properties, such as the band gap, and the electronic defect densities in the bulk and at the surface prevail. Here, we synthesize single crystals of methylammonium lead bromide (CH3NH3PbBr3), characterise the optical absorption and photoluminescence and show that the optical properties of single crystals are almost identical to those of polycrystalline thin films. We observe significantly longer lifetimes and show that carrier diffusion plays a substantial role in the photoluminescence decay. Contrary to many reports, we determine that the trap density in CH3NH3PbBr3 perovskite single crystals is 1015 cm−3 , only one order of magnitude lower than in the thin films. Our enhanced understanding of optical properties and recombination processes elucidates ambiguities in earlier reports, and highlights the discrepancies in the estimation of trap densities from electronic and optical methods.

Suggested Citation

  • Bernard Wenger & Pabitra K. Nayak & Xiaoming Wen & Sameer V. Kesava & Nakita K. Noel & Henry J. Snaith, 2017. "Consolidation of the optoelectronic properties of CH3NH3PbBr3 perovskite single crystals," Nature Communications, Nature, vol. 8(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00567-8
    DOI: 10.1038/s41467-017-00567-8
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    Cited by:

    1. Yurou Zhang & Miaoqiang Lyu & Tengfei Qiu & Ekyu Han & Il Ku Kim & Min-Cherl Jung & Yun Hau Ng & Jung-Ho Yun & Lianzhou Wang, 2020. "Halide Perovskite Single Crystals: Optoelectronic Applications and Strategical Approaches," Energies, MDPI, vol. 13(16), pages 1-27, August.
    2. Jongchul Lim & Manuel Kober-Czerny & Yen-Hung Lin & James M. Ball & Nobuya Sakai & Elisabeth A. Duijnstee & Min Ji Hong & John G. Labram & Bernard Wenger & Henry J. Snaith, 2022. "Long-range charge carrier mobility in metal halide perovskite thin-films and single crystals via transient photo-conductivity," Nature Communications, Nature, vol. 13(1), pages 1-9, December.
    3. Gang Wang & Tanghao Liu & Bingzhe Wang & Hao Gu & Qi Wei & Zhipeng Zhang & Jun He & Mingjie Li & Guichuan Xing, 2022. "Hot-carrier tunable abnormal nonlinear absorption conversion in quasi-2D perovskite," Nature Communications, Nature, vol. 13(1), pages 1-10, December.

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