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Research Article

Lead halide perovskite nanowires stabilized by block copolymers for Langmuir-Blodgett assembly

Hao Liu1,3,†, Martin Siron1,2, Mengyu Gao2,3, Dylan Lu1,3, Yehonadav Bekenstein1,3,4,‡, Dandan Zhang1,3, Letian Dou1,3,┴, Paul A. Alivisatos1,2,3,4, Peidong Yang1,2,3,4( )
Department of Chemistry, University of California, Berkeley, California 94720, USA
Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Kavli Energy NanoScience Institute, Berkeley, California 94720, USA

† Present address: Center for Advanced Low-dimension Materials, Donghua University, Shanghai 201620, China;

‡Present address: Department of Materials Science and Engineering, Technion-Israel institute of technology, Haifa 3200003, Israe;

⊥Present address: Davidson School of Chemical Engineering, Purdue University, West Lafayette, Indiana 47907, USA

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Abstract

The rapid development of solar cells based on lead halide perovskites (LHPs) has prompted very active research activities in other closely-related fields. Colloidal nanostructures of such materials display superior optoelectronic properties. Especially, one-dimensional (1D) LHPs nanowires show anisotropic optical properties when they are highly oriented. However, the ionic nature makes them very sensitive to external environment, limiting their large scale practical applications. Here, we introduce an amphiphilic block copolymer, polystyrene-block-poly(4-vinylpyridine) (PS-P4VP), to chemically modify the surface of colloidal CsPbBr3 nanowires. The resulting core-shell nanowires show enhanced photoluminescent emission and good colloidal stability against water. Taking advantage of the stability enhancement, we further applied a modified Langmuir-Blodgett technique to assemble monolayers of highly aligned nanowires, and studied their anisotropic optical properties.

Keywords

nanowiresanisotropic optical propertiesaligned monolayerlead halide perovskitesstability enhancement

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References

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Nano Research
Volume 13 Issue 5,
May 2020
Pages 1453-1458
DOI: 10.1007/s12274-020-2717-9
Cite this article:
Liu H, Siron M, Gao M, et al. Lead halide perovskite nanowires stabilized by block copolymers for Langmuir-Blodgett assembly. Nano Research, 2020, 13(5): 1453-1458. https://doi.org/10.1007/s12274-020-2717-9
Topics:
Block copolymers Bromine compoundsCesium compoundsLead compoundsMonolayersPerovskitePerovskite solar cellsSolsThin film transistors

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Received: 08 January 2020
Revised: 03 February 2020
Accepted: 10 February 2020
Published: 09 March 2020
© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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