Large-Area and Efficient Sky-Blue Perovskite Light-Emitting Diodes via Blade-Coating

Large-Area and Efficient Sky-Blue Perovskite Light-Emitting Diodes via Blade-Coating

© 2022 Wiley-VCH GmbH.

Détails bibliographiques
Publié dans:Advanced materials (Deerfield Beach, Fla.). - 1998. - 34(2022), 16 vom: 21. Apr., Seite e2108939
Auteur principal: Chu, Shenglong (Auteur)
Autres auteurs: Zhang, Yihan, Xiao, Peng, Chen, Wenjing, Tang, Rongfeng, Shao, Yi, Chen, Tao, Zhang, Xiaoqiang, Liu, Fengguang, Xiao, Zhengguo
Format: Article en ligne
Langue:English
Publié: 2022
Accès à la collection:Advanced materials (Deerfield Beach, Fla.)
Sujets:Journal Article blade coating crystallization control large-area fabrication metal halide perovskites sky-blue light-emitting diodes
Description
Résumé:© 2022 Wiley-VCH GmbH.
Large-area fabrication of perovskite light-emitting diodes (PeLEDs) through mass-production techniques has attracted growing attention due to their potential applications in lighting. Several breakthroughs are made for red/infrared and green emissions. Nevertheless, large-area blue/sky-blue PeLEDs, a requisite color for lighting, have not yet been reported. Here, efficient and large-area sky-blue PeLEDs are fabricated through blade-coating supersaturated precursors. The volume ratio of dimethyl sulfoxide to dimethylformamide is tuned to obtain a supersaturated CsPb(Br0.84 Cl0.16 )3 solution. Blade-coating this supersaturated precursor results in nucleation in the solution phase with much higher nucleation sites, and a faster crystallization rate. The uniform films formed by this approach exhibit smaller grain size, lower trap density, and higher radiative recombination rate. The peak external quantum efficiency of the blade-coated PeLEDs reaches 10.3% with sky-blue emission (489 nm). Benefitting from the robustness of this blade-coating technique, large-area sky-blue PeLEDs with a device area of 28 cm2 are also achieved with uniform emission. This work represents a significant step forward toward flat-panel lighting and full-color display for the PeLEDs
Description:Date Revised 21.04.2022
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202108939