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
A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behaviour
Daniel G. Congrave,Bluebell H. Drummond,Qinying Gu,Stephanie Montanaro,Haydn Francis,Victor Riesgo-González,Weixuan Zeng,Campbell Matthews,Simon Dowland,Iain A. Wright,Clare P. Grey,Richard H. Friend,Hugo Bronstein +12 more
TL;DR: The unique synergy of properties offered by an efficient and processable near-infrared thermally activated delayed fluorescent (NIR TADF) dye could be transformative across research fields.
Journal ArticleDOI
Spiro-Configured Dibenzosuberenes as Deep-Blue Emitters for Organic Light-Emitting Diodes with CIEy of 0.04
Cyril Poriel,Cassandre Quinton,Clément Brouillac,Olivier Jeannin,Joëlle Rault-Berthelot,Zuo-Quan Jiang,Wan-Shan Shen +6 more
TL;DR: Deep blue electroluminescence is highly required for organic light-emitting diode (OLED) technology as discussed by the authors , however, designing fluorophores displaying adequate CIE coordinates and particularly a low CIEy is far from an easy task.
Journal ArticleDOI
Green-, Red-, and Infrared-Emitting Polymorphs of Sterically Hindered Push-Pull Substituted Stilbenes.
Karel Pauk,Stanislav Luňák,Aleš Růžička,Aneta Marková,Anna Mausová,Matouš Kratochvíl,Klára Melánová,Martin Weiter,Aleš Imramovský,Martin Vala +9 more
TL;DR: Electronic coupling in dimers and potential twist elasticity of monomers were studied by density functional theory and Absorption and fluorescence maxima in solvents of various polarity show bathochromic shift with respect to parent DPA-stilbene-EWGs.
Journal ArticleDOI
A porphyrin pentamer as a bright emitter for NIR OLEDs
TL;DR: In this paper , the luminescence and electroluminescence of an ethyne-linked zinc pentamer were investigated, by testing blends in two different conjugated polymer matrices, at a range of concentrations.
Journal ArticleDOI
Recent Advances in Structural Design of Efficient Near‐Infrared Light‐Emitting Organic Small Molecules
TL;DR: In this paper , a review outlines molecular design strategies for developing organic small-molecule NIR light-emitting materials with high emission efficiency that can overcome the energy gap law to be applied to next-generation wearable devices.
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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Gang Qian,Zhi Yuan Wang +1 more
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