Cited by 314Organic Light-Emitting Diodes ResearchLuminescence and Fluorescent MaterialsLuminescence Properties of Advanced Materials

Recent Progress of Highly Efficient Red and Near‐Infrared Thermally Activated Delayed Fluorescent Emitters

Kim, Ji Han, Yun, Ju Hui, Lee, Jun Yeob·2018·Advanced Optical Materials

Abstract

Organic emitters have been widely developed since the demonstration of high efficiency in pure organic emitters represented by thermally activated delayed fluorescent (TADF) emitters. Pure organic‐based TADF emitters are found to harvest all singlet and triplet excitons for radiative transition processes, like phosphorescent emitters that utilize all generated excitons for light emission by strong spin–orbit coupling. Red, green, and blue organic emitters are investigated, but major interest is focused on green and blue organic emitters. However, recent studies are being directed to red and even near‐infrared emitters because of their wide applications in bioimaging, sensors, telecommunications, and night vision. Although the external quantum efficiency of the red and near‐infrared TADF organic light‐emitting diodes (OLEDs) is low, the external quantum efficiency of red OLEDs has been advanced to close to 30% and that of near‐infrared OLEDs to the 10% level. Therefore, more attention is being paid to red and near‐infrared TADF emitters. In this work, recent progress of the red and near‐infrared TADF emitters is reviewed to understand the molecular design principle and the molecular structure–photophysical characteristics and molecular structure–device performance relationships. In addition, future prospect of the red and near‐infrared TADF emitters is proposed.

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Crossref · 10.1002/adom.201800255

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Authors
Kim, J. H., Yun, J. H., & Lee, J. Y.
Affiliations
Sungkyunkwan University (KR)
Corresponding author
Lee, Jun Yeob
Venue
Advanced Optical Materials
Publisher
Wiley
Published
2018-06-27
Volume
6
Issue
18
ISSN
2195-1071 (ISSN-L)
OpenAlex
W2811452226
Cited by
314
References
62
Citations by year
2026: 11 · 2025: 30 · 2024: 32 · 2023: 44 · 2022: 52 · 2021: 61 · 2020: 47 · 2019: 34 · 2018: 3
FWCI
13.87
Type
journal article
Language
en
Open access
closed
Locations
Advanced Optical Materials (publishedVersion)
Funders
  • National Research Foundation of Korea
  • Ministry of Science, ICT and Future Planning (2016R1A2B3008845)
  • Ministry of Trade, Industry and Energy
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, red emitters, near-infrared emitters, organic light-emitting diodes, external quantum efficiency, molecular design, bioimaging

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