Journal article 743 views 218 downloads
Micron-Size Two-Dimensional Methylammonium Lead Halide Perovskites
Eugen Klein,
Andres Black,
Öznur Tokmak,
Christian Strelow,
Rostyslav Lesyuk,
Christian Klinke 
ACS Nano, Volume: 13, Issue: 6, Pages: 6955 - 6962
Swansea University Author:
Christian Klinke
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DOI (Published version): 10.1021/acsnano.9b01907
Abstract
Hybrid lead halide perovskites with 2D stacking structures have recently emerged as promising materials for optoelectronic applications. We report a method for growing 2D nanosheets of hybrid lead halide perovskites (I, Br and Cl), with tunable lateral sizes ranging from 0.05 to 8 μm and a structure...
| Published in: | ACS Nano |
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| ISSN: | 1936-0851 1936-086X |
| Published: |
2019
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa51039 |
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| Abstract: |
Hybrid lead halide perovskites with 2D stacking structures have recently emerged as promising materials for optoelectronic applications. We report a method for growing 2D nanosheets of hybrid lead halide perovskites (I, Br and Cl), with tunable lateral sizes ranging from 0.05 to 8 μm and a structure consisting of n stacked monolayers separated by long alkylamines, tunable from bulk down to n = 1. The key to obtaining such a wide range of perovskite properties hinged on utilizing the respective lead halide nanosheets as precursors in a hot-injection synthesis that afforded careful control over all process parameters. The layered, quantum-confined (n ≤ 4) nanosheets were comprised of major and minor fractions with differing n. Energy funneling from low to high n (high to low energy) regions within a single sheet, mediated by the length of the ligands between stacks, produced photoluminescent quantum yields as high as 49%. These large, tunable 2D nanosheets could serve as convenient platforms for future high-efficiency optoelectronic devices. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
6 |
| Start Page: |
6955 |
| End Page: |
6962 |