| Autor: |
Guilin Bai, Yatao Zou, Ya Li, Lei Cai, Botong Chen, Jiaqing Zang, Zhiwei Hong, Jiangyu Chen, Zhewei Chen, Steffen Duhm, Tao Song, Baoquan Sun |
| Rok vydání: |
2022 |
| Předmět: |
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| Zdroj: |
The Journal of Physical Chemistry Letters. 13:3121-3129 |
| ISSN: |
1948-7185 |
| DOI: |
10.1021/acs.jpclett.2c00564 |
| Popis: |
Balanced charge injection is key to achieving perovskite light-emitting diodes (PeLEDs) with a low efficiency roll-off at a high brightness. The use of zinc oxide (ZnO) with a high electron mobility as the charge transport layers is desirable; however, photoluminescence (PL) quenching of a perovskite on ZnO always occurs. Here, a quasi-two-dimensional perovskite on ZnO is explored to uncover the PL quenching mechanism, mainly ascribed to the deprotonation of ammonium cations on the ZnO film in association with the decomposition of low-dimensional perovskite phases. Surprisingly, crystal plane-dependent PL quenching results indicate that the deprotonation rate strongly correlates with the crystal orientation of the ZnO surface. We developed a strategy for suppressing perovskite PL quenching by incorporating an atomic layer deposited Al |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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