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Nano Research

Article Title

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

Authors

Hao Liu, Department of Chemistry, University of California, Berkeley, California 94720, USA Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Martin Siron, Department of Chemistry, University of California, Berkeley, California 94720, USA Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA
Mengyu Gao, Department of Materials Science and Engineering, University of California, Berkeley, California 94720, USA Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Dylan Lu, Department of Chemistry, University of California, Berkeley, California 94720, USA Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Yehonadav Bekenstein, Department of Chemistry, 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
Dandan Zhang, Department of Chemistry, University of California, Berkeley, California 94720, USA Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
Letian Dou, Department of Chemistry, University of California, Berkeley, California 94720, USA Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
A. Paul Alivisatos, 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
Peidong Yang, 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

Keywords

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

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, onedimensional (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.

Graphical Abstract

Publisher

Tsinghua University Press

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