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Reply to: Perovskite decomposition and missing crystal planes in HRTEM

Nature volume 594, pages E8–E9 (2021)Cite this article

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The Original Article was published on 09 June 2021

In our Letter published in 20151, we reported epitaxial growth of perovskite around PbS quantum dots. The quantum dot surface is passivated by the crystalline perovskite scaffolding without the need of conventional ligands, leading to a two-orders-of-magnitude enhancement in the photoluminescence quantum yield in infrared quantum dot films. This material provided efficient charge carrier transfer from the perovskite to the quantum dots, enabling sensitization.

In the accompanying Comment2, Deng asks whether there is enough evidence for PbS being embedded into perovskite, and in particular whether TEM images in the original Letter correspond to PbI2 as opposed to perovskite or PbS. Deng noted a difference in the estimated interplanar angle in his analysis of our published data (Deng finds 57°) compared to the value we report (60°). Deng also points out the absence of a diffraction spot related to the (112) plane of perovskite and suggests possible perovskite degradation.

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Fig. 1: TEM analysis of quantum dots in perovskite.

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The data within this paper and findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

The TEM characterization was supported by the Center for High-resolution Electron Microscopy (ChEM) at ShanghaiTech University. We thank Y. Yu, B. Yuan and K. Xu at ShanghaiTech University for the TEM measurement. We thank Y. Li at Stanford University for discussions.

Author information

Author notes

  1. These authors contributed equally: Zhijun Ning, Xiwen Gong, Riccardo Comin

Authors and Affiliations

  1. School of Physical Science and Technology, ShanghaiTech University, Shanghai, China

    Zhijun Ning

  2. Department of Chemical Engineering, University of Michigan, Ann Arbor, MI, USA

    Xiwen Gong

  3. Department of Materials Science and Engineering, University of Michigan, Ann Arbor, MI, USA

    Xiwen Gong

  4. Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI, USA

    Xiwen Gong

  5. Macromolecular Science and Engineering Program, University of Michigan, Ann Arbor, MI, USA

    Xiwen Gong

  6. Applied Physics Program, University of Michigan, Ann Arbor, MI, USA

    Xiwen Gong

  7. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA, USA

    Riccardo Comin

  8. Department of Electrical and Computer Engineering, University of Toronto, Toronto, Ontario, Canada

    Grant Walters, Andrei Buin, Sjoerd Hoogland & Edward H. Sargent

  9. Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, China

    Fengjia Fan

  10. Department of Modern Physics, University of Science and Technology of China, Hefei, China

    Fengjia Fan

  11. CAS Key Laboratory of Microscale Magnetic Resonance, University of Science and Technology of China, Hefei, China

    Fengjia Fan

  12. Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, China

    Fengjia Fan

  13. Department of Physical and Environmental Sciences, University of Toronto Scarborough, Scarborough, Ontario, Canada

    Oleksandr Voznyy

  14. Department of Physics, University of Maranhão, São Luís, Brazil

    Emre Yassitepe

Authors
  1. Zhijun Ning
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  6. Oleksandr Voznyy
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Contributions

X.G., Z.N., O.V. and E.H.S. designed and directed this study. Z.N. led the experimental work. X.G., Z.N., O.V. and E.H.S. wrote the manuscript. R.C., F.F., E.Y. and S.H. participated in discussions. All authors contributed to reviewing and commenting on the manuscript.

Corresponding author

Correspondence to Edward H. Sargent.

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Ning, Z., Gong, X., Comin, R. et al. Reply to: Perovskite decomposition and missing crystal planes in HRTEM. Nature 594, E8–E9 (2021). https://doi.org/10.1038/s41586-021-03424-3

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