Perovskite-molecule composite thin films for efficient and stable light-emitting diodes

0522449 - ÚMCH 2021 RIV GB eng J - Journal Article
Wang, H. - Kosasih, F. U. - Yu, H. - Zheng, G. - Zhang, J. - Pozina, G. - Liu, Y. - Bao, C. - Hu, Z. - Liu, X. - Kobera, Libor - Abbrent, Sabina - Brus, Jiří - Jin, Y. - Fahlman, M. - Friend, R. H. - Ducati, C. - Liu, X.-K. - Gao, F.
Perovskite-molecule composite thin films for efficient and stable light-emitting diodes.
Nature Communications. Roč. 11, č. 1 (2020), s. 1-9, č. článku 891. E-ISSN 2041-1723
Institutional support: RVO:61389013
Keywords : bioimaging * cathodoluminescence * LuAG
OECD category: Polymer science
Impact factor: 14.919, year: 2020
Method of publishing: Open access
https://www.nature.com/articles/s41467-020-14747-6

Although perovskite light-emitting diodes (PeLEDs) have recently experienced significant progress, there are only scattered reports of PeLEDs with both high efficiency and long operational stability, calling for additional strategies to address this challenge. Here, we develop perovskite-molecule composite thin films for efficient and stable PeLEDs. The perovskite-molecule composite thin films consist of in-situ formed high-quality perovskite nanocrystals embedded in the electron-transport molecular matrix, which controls nucleation process of perovskites, leading to PeLEDs with a peak external quantum efficiency of 17.3% and half-lifetime of approximately 100 h. In addition, we find that the device degradation mechanism at high driving voltages is different from that at low driving voltages. This work provides an effective strategy and deep understanding for achieving efficient and stable PeLEDs from both material and device perspectives.
Permanent Link: http://hdl.handle.net/11104/0306945