The DOI matches its Crossref record; 52 of the 52 references it cites were found in a registry or an index.
Achieving High‐Performance Nondoped OLEDs with Extremely Small Efficiency Roll‐Off by Combining Aggregation‐Induced Emission and Thermally Activated Delayed Fluorescence
Abstract
Luminescent materials with thermally activated delayed fluorescence (TADF) can harvest singlet and triplet excitons to afford high electroluminescence (EL) efficiencies for organic light‐emitting diodes (OLEDs). However, TADF emitters generally have to be dispersed into host matrices to suppress emission quenching and/or exciton annihilation, and most doped OLEDs of TADF emitters encounter a thorny problem of swift efficiency roll‐off as luminance increases. To address this issue, in this study, a new tailor‐made luminogen (dibenzothiophene‐benzoyl‐9,9‐dimethyl‐9,10‐dihydroacridine, DBT‐BZ‐DMAC) with an unsymmetrical structure is synthesized and investigated by crystallography, theoretical calculation, spectroscopies, etc. It shows aggregation‐induced emission, prominent TADF, and interesting mechanoluminescence property. Doped OLEDs of DBT‐BZ‐DMAC show high peak current and external quantum efficiencies of up to 51.7 cd A −1 and 17.9%, respectively, but the efficiency roll‐off is large at high luminance. High‐performance nondoped OLED is also achieved with neat film of DBT‐BZ‐DMAC, providing excellent maxima EL efficiencies of 43.3 cd A −1 and 14.2%, negligible current efficiency roll‐off of 0.46%, and external quantum efficiency roll‐off approaching null from peak values to those at 1000 cd m −2 . To the best of the authors' knowledge, this is one of the most efficient nondoped TADF OLEDs with small efficiency roll‐off reported so far.
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Aggregation-Induced Emission: Together We Shine, United We Soar!
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Self-citationThermally Activated Delayed Fluorescence Materials Towards the Breakthrough of Organoelectronics
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Highly efficient blue electroluminescence based on thermally activated delayed fluorescence
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All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes
Liu, Y., Li, C., Ren, Z., Yan, S., & Bryce, M. R. (2018) · Nature Reviews Materials · doi:10.1038/natrevmats.2018.20 · Cited by 1,653
Aggregation‐Induced Emission: New Vistas at the Aggregate Level
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Self-citationAggregation-induced emission: fundamental understanding and future developments
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Metadata
- Authors
- Guo, J., Li, X., Nie, H., Luo, W., Gan, S., Hu, S., Hu, R., Qin, A., Zhao, Z., Su, S., & Tang, B. Z.
- Affiliations
- State Key Laboratory of Luminescent Materials and Devices (CN)
- Hong Kong University of Science and Technology (HK)
- Corresponding author
- Zhao, Zujin
- Su, Shi‐Jian
- Tang, Ben Zhong
- ORCID
- Venue
- Advanced Functional Materials
- Publisher
- Wiley
- Published
- 2017-02-10
- Volume
- 27
- Issue
- 13
- ISSN
- 1616-301X (ISSN-L)
- 1616-3028
- OpenAlex
- W2587226288
- Cited by
- 444
- References
- 52
- Citations by year
- 2026: 14 · 2025: 20 · 2024: 20 · 2023: 38 · 2022: 47 · 2021: 63 · 2020: 63 · 2019: 70 · 2018: 81 · 2017: 28
- FWCI
- 27.52
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Advanced Functional Materials (publishedVersion)
- Rare & Special e-Zone (The Hong Kong University of Science and Technology) (submittedVersion)
- Funders
- National Natural Science Foundation of China (21673082)
- Ministry of Science and Technology of the People's Republic of China
- Natural Science Foundation of Guangdong Province (2016A030312002)
- Innovation and Technology Commission - Hong Kong (ITC‐CNERC14SC01)
- Topics
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence Properties of Advanced Materials
- Keywords
- thermally activated delayed fluorescence, aggregation-induced emission, non-doped OLEDs, efficiency roll-off, mechanoluminescence, external quantum efficiency, current efficiency, luminescent materials, exciton harvesting
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