Efficient Electroluminescence from Organic Fluorophore-Containing Perovskite Films

Efficient Electroluminescence from Organic Fluorophore-Containing Perovskite Films

© 2024 Wiley‐VCH GmbH.

Bibliographische Detailangaben
Veröffentlicht in:Advanced materials (Deerfield Beach, Fla.). - 1998. - 36(2024), 49 vom: 04. Dez., Seite e2408775
1. Verfasser: Matsushima, Toshinori (VerfasserIn)
Weitere Verfasser: Qin, Chuanjiang, Teng, Teng, Kamatham, Narayanaswamy, Sosa Vargas, Lydia, Kreher, David, Heinrich, Benoit, Ishii, Tomohiro, Terakawa, Shinobu, Leyden, Matthew R, Sandanayaka, Atula S D, Bencheikh, Fatima, Miyata, Kiyoshi, Onda, Ken, Kanemitsu, Yoshihiko, Mathevet, Fabrice, Adachi, Chihaya
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Advanced materials (Deerfield Beach, Fla.)
Schlagworte:Journal Article 2D perovskites electroluminescence energy transfer light‐emitting diodes organic fluorophores
Beschreibung
Zusammenfassung:© 2024 Wiley‐VCH GmbH.
Two-dimensional perovskites containing an organic fluorophore can be a unique emitter for light-emitting diodes (LEDs). However, external quantum efficiencies (EQEs) of fluorophore-containing perovskite LEDs reported thus far are still very low. In this study, these are able to boost the EQE to ≈10% by choosing an organic fluorophore with appropriate energy levels for the perovskite structure organization. In the fluorophore-containing perovskite LEDs, carrier transport and exciton formation take place in the perovskite's metal halide framework, thereby avoiding the direct formation of nonradiative triplet excitons on the organic fluorophores. Subsequently, the bright triplet excitons formed in the metal halide framework are transferred to form the radiative singlet states of the organic fluorophores, leading to efficient electroluminescence (EL) from the organic fluorophores regularly dispersed inside the perovskite structure. Unexpectedly higher light-outcoupling efficiency, which is caused by the light scattering in the polycrystalline perovskite layer, will be another reason for efficient EL. These findings will contribute toward the fabrication of LED-based products with high performance at a low cost
Beschreibung:Date Revised 05.12.2024
published: Print-Electronic
Citation Status PubMed-not-MEDLINE
ISSN:1521-4095
DOI:10.1002/adma.202408775