Jump to main content
Jump to site search


Influence of a lecithin additive on the performance of all-inorganic perovskite light-emitting diodes

Author affiliations

Abstract

All-inorganic halide perovskites with superior optoelectronic properties are promising materials for efficient perovskite light-emitting diodes. However, they usually suffer from a large grain size (hundreds of nanometers), high surface roughness and poor stability during the spin coating process. Here, we report a facile strategy to fabricate a uniform and flat CsPbBr3 film. A small amount of lecithin (LE) introduced into CsPbBr3 precursor solution can promote the formation of small CsPbBr3 grains that remarkably improve the uniformity of perovskite films with a surface roughness of about 2.2 nm. Furthermore, the CsPbBr3–LE films display excellent fluorescence stability in ambient air and LED devices based on the CsPbBr3–5 wt% LE film exhibit a current efficiency (CE) of 24 cd A−1 with an external quantum efficiency (EQE) of 6.5%. Therefore, it is anticipated that the findings of the present study will have great potential to boost the development of PeLEDs.

Graphical abstract: Influence of a lecithin additive on the performance of all-inorganic perovskite light-emitting diodes

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Dec 2018, accepted on 02 Feb 2019 and first published on 13 Feb 2019


Article type: Paper
DOI: 10.1039/C8TC06365F
Citation: J. Mater. Chem. C, 2019, Advance Article

  •   Request permissions

    Influence of a lecithin additive on the performance of all-inorganic perovskite light-emitting diodes

    S. Sun, X. Hua, Q. Liu, T. Wang, W. Luo, Y. Zhang, L. Liao and M. Fung, J. Mater. Chem. C, 2019, Advance Article , DOI: 10.1039/C8TC06365F

Search articles by author

Spotlight

Advertisements