Efficient Electroluminescence from Organic Fluorophore‐Containing Perovskite Films
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.
Authors
- Chuanjiang Qin (ORCID: https://orcid.org/0000-0002-6927-2544)
- Yoshihiko Kanemitsu (ORCID: https://orcid.org/0000-0002-0788-131X)
- Chihaya Adachi (ORCID: https://orcid.org/0000-0001-6117-9604)
- Fabrice Mathevet (ORCID: https://orcid.org/0000-0002-3813-1335)
- Benoı̂t Heinrich (ORCID: https://orcid.org/0000-0001-6795-2733)
- Fatima Bencheikh
- Ken Onda (ORCID: https://orcid.org/0000-0003-1724-2009)
- Atula S. D. Sandanayaka (ORCID: https://orcid.org/0000-0003-3451-1653)
- Toshinori Matsushima (ORCID: https://orcid.org/0000-0001-8329-1883)
- Matthew R. Leyden (ORCID: https://orcid.org/0000-0002-7485-3351)
- Kiyoshi Miyata (ORCID: https://orcid.org/0000-0001-6748-1337)
- Lydia Sosa‐Vargas (ORCID: https://orcid.org/0000-0002-3556-2228)
- Shinobu Terakawa
- David Kréher (ORCID: https://orcid.org/0000-0002-0968-5224)
- Teng Teng (ORCID: https://orcid.org/0000-0001-6460-7109)
- Kamatham Narayanaswamy (ORCID: https://orcid.org/0000-0002-9977-4879)
- Tomohiro Ishii
Institutions
- Centre National de la Recherche Scientifique (FR)
- Kyushu University (JP)
- Kyoto University (JP)
- Sorbonne Université (FR)
- Japan Science and Technology Agency (JP)
- Changchun Institute of Applied Chemistry (CN)
- SRM University, Andhra Pradesh (IN)
- Institut de Physique et Chimie des Matériaux de Strasbourg (FR)
- Institut Parisien de Chimie Moléculaire (FR)
- State Key Laboratory of Polymer Physics and Chemistry (CN)
- Kyoto University Institute for Chemical Research
- Université de Strasbourg (FR)
Publication Details
- Journal
- Advanced Materials
- Published
- 2024-10-17
- DOI
- https://doi.org/10.1002/adma.202408775
- Citations
- 5
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.04
Funders
- Asahi Glass Foundation
- Samco Foundation
- Japan Science and Technology Corporation
- New Energy and Industrial Technology Development Organization
- Iwatani Naoji Foundation
- Iketani Science and Technology Foundation
- Murata Science Foundation
- Japan Society for the Promotion of Science
- Japan Science and Technology Agency
- Exploratory Research for Advanced Technology