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

Hao Liu; Martin Siron; Mengyu Gao; Dylan Lu; Yehonadav Bekenstein; Dandan Zhang; Letian Dou; Paul A. Alivisatos; Peidong Yang

doi:10.1007/s12274-020-2717-9

Nano Research 2020, 13(5): 1453-1458 https://doi.org/10.1007/s12274-020-2717-9

Research Article | Issue | Published: 09 March 2020

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

Show Author's Information Hide Author's Information Hao Liu^{¹^,³^,^†}, Martin Siron^{¹^,²}, Mengyu Gao^{²^,³}, Dylan Lu^{¹^,³}, Yehonadav Bekenstein^{¹^,³^,⁴^,^‡}, Dandan Zhang^{¹^,³}, Letian Dou^{¹^,³^,^┴}, Paul A. Alivisatos^{¹^,²^,³^,⁴}, Peidong Yang^{¹^,²^,³^,⁴}(

)

1Department of Chemistry, University of California, Berkeley, California 94720, USA

2Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA

3Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA

4Kavli 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

Keywords:

nanowires, anisotropic optical properties, aligned monolayer, lead halide perovskites, stability enhancement

Topics:

Block copolymers Bromine compounds Cesium compounds Lead compounds Monolayers Perovskite Perovskite solar cells Sols Thin film transistors

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

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Abstract Electronic supplementary material About this article

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.

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Acknowledgements

Publication history

Received: 08 January 2020

Revised: 03 February 2020

Accepted: 10 February 2020

Published: 09 March 2020

Issue date: May 2020

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Acknowledgements

This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract No. DE-AC02-05-CH11231 within the Physical Chemistry of Inorganic Nanostructures Program (KC3103). M. S. acknowledges his support from the National Science Foundation Graduate Research Fellowship under Grant No. DGE 1752814.