Title: Spatially resolved multicolor CsPbX ₃ nanowire heterojunctions via anion exchange

Abstract

Halide perovskites are promising semiconductor materials for solution-processed optoelectronic devices. Their strong ionic bonding nature results in highly dynamic crystal lattices, inherently allowing rapid ion exchange at the solid–vapor and solid–liquid interface. In this paper, we show that the anion-exchange chemistry can be precisely controlled in single-crystalline halide perovskite nanomaterials when combined with nanofabrication techniques. We demonstrate spatially resolved multicolor CsPbX₃ (X = Cl, Br, I, or alloy of two halides) nanowire heterojunctions with a pixel size down to 500 nm with the photoluminescence tunable over the entire visible spectrum. In addition, the heterojunctions show distinct electronic states across the interface, as revealed by Kelvin probe force microscopy. Finally, these perovskite heterojunctions represent key building blocks for high-resolution multicolor displays beyond current state-of-the-art technology as well as high-density diode/transistor arrays.

Authors:

Dou, Letian ^[1]; Lai, Minliang ^[2]; Kley, Christopher S. ^[2]; Yang, Yiming ^[1]; Bischak, Connor G. ^[2]; Zhang, Dandan ^[2]; Eaton, Samuel W. ^[2]; Ginsberg, Naomi S. ^[3]; Yang, Peidong ^[4]

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+ Show Author Affiliations

1. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,
2. Department of Chemistry, University of California, Berkeley, CA 94720,
3. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Department of Physics, University of California, Berkeley, CA 94720,, Kavli Energy NanoSciences Institute, Berkeley, CA 94720,, Molecular Biophysics and Integrative Bioimaging Division, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720,
4. Department of Chemistry, University of California, Berkeley, CA 94720,, Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720,, Kavli Energy NanoSciences Institute, Berkeley, CA 94720,, Department of Materials Science and Engineering, University of California, Berkeley, CA 94720

Publication Date:

Mon Jun 26 00:00:00 EDT 2017

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)

OSTI Identifier:

1369085

Alternate Identifier(s):

OSTI ID: 1417596

Grant/Contract Number:  

AC02-05CH11231; DGE 1106400

Resource Type:

Published Article

Journal Name:

Proceedings of the National Academy of Sciences of the United States of America

Additional Journal Information:

Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Volume: 114 Journal Issue: 28; Journal ID: ISSN 0027-8424

Publisher:

Proceedings of the National Academy of Sciences

Country of Publication:

United States

Language:

English

Subject:

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; nanowire; halide perovskite; anion exchange; heterojunction