Journal ArticleDOI
Over 10% EQE Near-Infrared Electroluminescence Based on a Thermally Activated Delayed Fluorescence Emitter
Yi Yuan,Yun Hu,Ye-Xin Zhang,Jiu-Dong Lin,Ya-Kun Wang,Zuo-Quan Jiang,Liang-Sheng Liao,Shuit-Tong Lee +7 more
TLDR
In this article, a wedge-shaped Dπ-A-π-D emitter with thermally activated delayed fluorescence property and a small single-triplet splitting (ΔEst) of 0.14 eV is presented.Abstract:
Significant effort has been made to develop novel material systems to improve the efficiency of near-infrared organic light-emitting diodes (NIR OLEDs). Of those, fluorescent chromophores are mostly studied because of their advantages in cost and tunability. However, it is still rare for fluorescent NIR emitters to present good color purities in the NIR range and to have high external quantum efficiency (EQE). Here, a wedge-shaped D-π-A-π-D emitter APDC-DTPA with thermally activated delayed fluorescence property and a small single-triplet splitting (ΔEst) of 0.14 eV is presented. The non-doped NIR device exhibits excellent performance with a maximum EQE of 2.19% and a peak wavelength of 777 nm. Remarkably, when 10 wt% of APDC-DTPA is doped in 1,3,5-tris(1-phenyl-1H-benzimidazol-2-yl)benzene host, an extremely high EQE of 10.19% with an emission peak of 693 nm is achieved. All these values represent the best result for NIR OLEDs based on a pure organic fluorescent emitter with similar device structure and color gamut.read more
Citations
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Journal ArticleDOI
Benzofuroacridine and benzothienoacridine as new donor moieties for emission color management of thermally activated delayed fluorescent emitters
TL;DR: In this paper, the authors developed donor moieties of thermally activated delayed fluorescent (TADF) emitters by modifying benzofuran and benzothiophene with an acridine moiety, respectively.
Journal ArticleDOI
Intermolecular charge-transfer aggregates enable high-efficiency near-infrared emissions by nonadiabatic coupling suppression
TL;DR: In this article, an intermolecular charge transfer aggregates (CTA) was proposed to realize high-efficiency near-infrared emissions via nonadiabatic coupling suppression.
Journal ArticleDOI
Interrupted intramolecular donor-acceptor interaction compensated by strong through-space electronic coupling for highly efficient near-infrared TADF with emission over 800 nm
Jin-Feng Cheng,A.Trauth,Dmitrii Alekseevich Panov,Ze-Hui Pan,Kai Zhang,Andreas Pretzel,Yue Zhao,Chuan-Kui Wang,Lei Ding,Man-Keung Fung,Jian Fan,Jian Fan +11 more
TL;DR: In this paper, the authors proposed a NIR thermally activated delayed fluorescence (TADF) material with an unprecedented NIR TADF material (AQTC-DTPA) with emission over 800nm.
Journal ArticleDOI
Deep-Blue and Hybrid-White Organic Light Emitting Diodes Based on a Twisting Carbazole-Benzofuro[2,3-b]Pyrazine Fluorescent Emitter.
TL;DR: By optimizing the device architectures, the color of hybrid-white OLEDs could be tunable from warm white to cool white using the aforementioned material as a bifunctional material.
Journal ArticleDOI
Interrupted intramolecular donor-acceptor interaction compensated by strong through-space electronic coupling for highly efficient near-infrared TADF with emission over 800 nm
TL;DR: In this paper , the authors proposed a NIR thermally activated delayed fluorescence (TADF) material with an unprecedented NIR TADF material (AQTC-DTPA) with emission over 800 nm.
References
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Journal ArticleDOI
Anthraquinone-Based Intramolecular Charge-Transfer Compounds: Computational Molecular Design, Thermally Activated Delayed Fluorescence, and Highly Efficient Red Electroluminescence
Qisheng Zhang,H. Kuwabara,William J. Potscavage,Shuping Huang,Yasuhiro Hatae,Takumi Shibata,Chihaya Adachi +6 more
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Near‐Infrared Organic Compounds and Emerging Applications
Gang Qian,Zhi Yuan Wang +1 more
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