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Aggregation‐Induced Dual‐Phosphorescence from Organic Molecules for Nondoped Light‐Emitting Diodes
Abstract
Aggregation‐induced emission (AIE) is a beneficial strategy for generating highly effective solid‐state molecular luminescence without suffering losses in quantum yield. However, the majority of reported AIE‐active molecules exhibit only strong fluorescence, which is not ideal for electrical excitation in organic light‐emitting diodes (OLEDs). By introducing various substituent groups onto the biscarbazole compound, a series of molecular materials with aggregation‐induced phosphorescence (AIP) is designed, which exhibits two distinctly different phosphorescence bands and an absolute solid‐state room‐temperature phosphorescence quantum yield up to 64%. Taking advantage of the AIE feature, the AIP molecules are fabricated into OLEDs as a homogeneous light‐emitting layer, which allows for relatively small efficiency roll‐off and shows an external electroluminescence quantum yield of up to 5.8%, more than the theoretical limit for purely fluorescent OLED devices. The design showcases a promising strategy for the production of cost‐effective and highly efficient OLED technology.
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Metadata
- Authors
- Wang, T., Su, X., Zhang, X., Nie, X., Huang, L., Zhang, X., Sun, X., Luo, Y., & Zhang, G.
- Affiliations
- University of Science and Technology of China (CN)
- New York University Shanghai (CN)
- Corresponding author
- Zhang, Xuepeng
- Sun, Xiang
- Zhang, Guoqing
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2019-11-06
- Volume
- 31
- Issue
- 51
- Pages
- e1904273-e1904273
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2985037923
- Semantic Scholar
- 5595388d20bafee64684ee7e6925dd6799a95372
- Cited by
- 276
- References
- 56
- Citations by year
- 2026: 21 · 2025: 29 · 2024: 56 · 2023: 46 · 2022: 49 · 2021: 46 · 2020: 29
- FWCI
- 11.17
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Advanced Materials (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Basic Research Program of China (2017YFA0303500)
- Fundamental Research Funds for the Central Universities (WK2340000068)
- National Natural Science Foundation of China (21903054)
- Topics
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence and Fluorescent Materials
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Organic Light-Emitting Diodes Research
- Physical Sciences › Materials Science › Materials Chemistry › Luminescence Properties of Advanced Materials
- Keywords
- aggregation-induced phosphorescence, aggregation-induced emission, organic light-emitting diodes, non-doped OLEDs, substituent effects, room-temperature phosphorescence, phosphorescence quantum yield, efficiency roll-off
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