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Metal halide perovskite nanorods with tailored dimensions, compositions and stabilities

Abstract

The colloidal synthesis of one-dimensional metal halide perovskite nanocrystals with precisely controlled diameter (D) and length (L) values is challenging due to the intrinsic structural symmetry and ionic crystal nature of the perovskites. This hinders investigation into their size- and shape-dependent properties and prevents their application. Here we report a general platform of cylindrical unimolecular nanoreactors to synthesize a library of one-dimensional perovskite nanorods (NRs) with tailored dimensions (D ≈ 7–16 nm; L ≈ 40–220 nm), compositions (all-inorganic perovskites; organic–inorganic perovskites; lead-free double perovskites) and enhanced colloidal, photo, polar-solvent and thermal stabilities. The dependence of the charge-carrier dynamics, photoluminescence quantum yield and optical anisotropy of the perovskite NRs on the diameter and length was examined. Decreasing the diameter yields opposite trends in the photoluminescence quantum yields and charge-carrier dynamics to that of increasing the length. In addition, enhanced structural anisotropy (that is, a higher aspect ratio of L/D) always increases the optical anisotropy of the perovskite NRs. By leveraging the cylindrical unimolecules as nanoreactors, a rich variety of uniform perovskite NRs with controllable dimensions, compositions and enhanced stabilities can be designed for use as building blocks for a variety of applications, such as in optoelectronic devices, catalysis and sensors.

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Fig. 1: Schematic representation of the synthesis of PS-ligated metal halide perovskite NRs.
Fig. 2: TEM images of PS-ligated CsPbBr3 NRs with various D and L values.
Fig. 3: TEM images of PS-ligated perovskite NRs of different compositions.
Fig. 4: TEM and HAADF-STEM images of PS-ligated caesium lead halide perovskite NRs.
Fig. 5: Dimension-dependent average PL decay lifetime and PLQY of two sets of PS-ligated CsPbBr3 NRs.
Fig. 6: Comparison of the stability of PS-ligated CsPbBr3 NRs and OctAm–OAm co-capped CsPbBr3 NRs by monitoring the evolution of the respective PL peak position and PL peak intensity.

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The data reported in this paper are available in the main text or the Supplementary Information. Source data are provided with this paper.

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Acknowledgements

This work is supported by the following funding: Air Force Office of Scientific Research grant FA9550-19-1-0317 (Z.L.), National Science Foundation grant DMR 1903990 and CHE 1903957 (Z.L.) and National Science Foundation grant CHE 2004080 (T.L.).

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Authors

Contributions

Z.L. conceived the idea and supervised the work. S.L., M.Z., S.H., M.T. and W.C. carried out the experiments. S.L., M.Z., S.H., M.T., W.C., T.L. and Z.L. analysed and discussed the data and results. Z.L. and S.L. wrote the original draft.

Corresponding author

Correspondence to Zhiqun Lin.

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Peer review information

Nature Synthesis thanks Qiao Zhang and the other, anonymous, reviewer(s) for their contribution to the peer review of this work. Primary handling editor: Alexandra Groves, in collaboration with the Nature Synthesis team.

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Supplementary information

Supplementary Information

Materials and additional experimental method, Discussion, Figs. 1–26 and Tables 1–4.

Source data

Source Data Fig. 5

Normalized PL decay data, averaged PL lifetime data and absolute PLQY data.

Source Data Fig. 6

Data reflecting evolution of the PL peak positions or intensities for the perovskite NRs under different conditions.

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Liang, S., Zhang, M., He, S. et al. Metal halide perovskite nanorods with tailored dimensions, compositions and stabilities. Nat. Synth 2, 719–728 (2023). https://doi.org/10.1038/s44160-023-00307-5

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