Dimensionality Controls Anion Intermixing in Electroluminescent Perovskite Heterojunctions.
| Autor: | Chin SH; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna, Spain., Mardegan L; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna, Spain., Palazon F; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna, Spain., Sessolo M; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna, Spain., Bolink HJ; Instituto de Ciencia Molecular (ICMol), Universidad de Valencia, C/Catedrático J. Beltrán 2, 46980 Paterna, Spain. |
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| Jazyk: | angličtina |
| Zdroj: | ACS photonics [ACS Photonics] 2022 Jul 20; Vol. 9 (7), pp. 2483-2488. Date of Electronic Publication: 2022 Jul 07. |
| DOI: | 10.1021/acsphotonics.2c00604 |
| Abstrakt: | Metal halide perovskites have emerged as a promising group of materials for optoelectronic applications such as photovoltaics, light emission, and photodetectors. So-far, in particular, the stability of light-emitting devices is limited, which is in part attributed to the intrinsic ionic conductivity of these materials. High-performance devices inevitably contain heterojunctions similar to other optoelectronic devices based on oxide perovskites, II-VI, or III-V group semiconductors. To enable efficient heterojunctions, ion exchange at the interface between different layers should be controlled. Herein, we report a method that enables to control and monitor the extent of anion intermixing between solution-processed lead bromide and vacuum-deposited lead chloride perovskite films. Taking advantage of the ability to fine tune the layer thicknesses of the vacuum-deposited films, we systematically study the effect of film thickness on anionic intermixing. Using these multiple layers, we prepare proof of principle light-emitting devices exhibiting green and blue electroluminescence. Competing Interests: The authors declare no competing financial interest. (© 2022 The Authors. Published by American Chemical Society.) |
| Databáze: | MEDLINE |
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