Perovskite-molecule composite thin films for efficient and stable light-emitting diodes.
MetadataShow full item record
Wang, H., Kosasih, F. U., Yu, H., Zheng, G., Zhang, J., Pozina, G., Liu, Y., et al. (2020). Perovskite-molecule composite thin films for efficient and stable light-emitting diodes.. Nature communications, 11 (1)https://doi.org/10.1038/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.
EC | EU Framework Programme for Research and Innovation H2020 | H2020 Priority Excellent Science | H2020 European Research Council (H2020 Excellent Science - European Research Council) (717026)
European Research Council (717026)
External DOI: https://doi.org/10.1038/s41467-020-14747-6
This record's URL: https://www.repository.cam.ac.uk/handle/1810/303573
Attribution 4.0 International
Licence URL: https://creativecommons.org/licenses/by/4.0/