Issue 12, 2023

Inverted semitransparent perovskite nanocrystal light-emitting diodes with a conjugated polymer as an electron transport layer

Abstract

Perovskite nanocrystals have attracted much attention due to their unique optical and electronic properties. Much progress has also been made in the development of light-emitting diodes based on perovskite nanocrystals in the past years. However, compared with the widely reported opaque perovskite nanocrystal light-emitting diodes, semitransparent perovskite nanocrystal light-emitting diodes are rarely studied, which affects the potential application of perovskite nanocrystals in the translucent display field in the future. Here, poly[(9,9-bis(3′-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PFN), a conjugated polymer, was used as an electron transport layer to fabricate the inverted opaque and semitransparent perovskite light-emitting diodes. The maximum external quantum efficiency and luminance were improved from 0.13% and 1041 cd m−2 to 2.07% and 12 540 cd m−2, respectively, through device optimization in opaque light-emitting diodes. The corresponding semitransparent device also demonstrated high transmittance (average 61% from 380 to 780 nm) and high brightness of 1619 and 1643 cd m−2 for the bottom and top sides, respectively.

Graphical abstract: Inverted semitransparent perovskite nanocrystal light-emitting diodes with a conjugated polymer as an electron transport layer

Supplementary files

Article information

Article type
Paper
Submitted
14 12 2022
Accepted
23 2 2023
First published
07 3 2023

Nanoscale, 2023,15, 5720-5725

Inverted semitransparent perovskite nanocrystal light-emitting diodes with a conjugated polymer as an electron transport layer

Q. Wan, Q. Zhang, J. Guo, M. Liu, W. Zhan, X. Liao, C. Yuan, M. He, W. Zheng, C. Zhang, L. Kong and L. Li, Nanoscale, 2023, 15, 5720 DOI: 10.1039/D2NR06998A

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