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
Achieving High-Performance Solution-Processed Deep-Red/Near-Infrared Organic Light-Emitting Diodes with a Phenanthroline-Based and Wedge-Shaped Fluorophore
Youming Zhang,Youming Zhang,Jiatao Wu,Jiatao Wu,Jun Song,Zhao Chen,Junjie He,Xin Wang,Haiyang Liu,Haiyang Liu,Shuming Chen,Junle Qu,Wai Yeung Wong +12 more
Journal ArticleDOI
Recent Progress in Emerging Near-Infrared Emitting Materials for Light-Emitting Diode Applications
Yingqi Zheng,Xiaozhang Zhu +1 more
TL;DR: In this paper, three kinds of emerging NIR-emitting materials used in lightemitting diodes (LEDs), namely organic materials, inorganic quantum dot (QD) materials, and organic-inorganic hybrid perovskite materials, are discussed, some representative works are reviewed, and a brief outlook for these materials is provided.
Journal ArticleDOI
Efficient aggregation-induced delayed fluorescent materials based on bipolar carrier transport materials for the fabrication of high-performance nondoped OLEDs with very small efficiency roll-off
TL;DR: In this article, two new compounds were synthesized by grafting functional groups with aggregation-induced delayed fluorescence (AIDF) to bipolar carrier transport materials, and the electronic structures, electrochemical properties, thermal stabilities and photophysical properties of the generated compounds were investigated systematically.
Journal ArticleDOI
Synthesis, Aromaticity, and Application of peri-Pentacenopentacene: Localized Representation of Benzenoid Aromatic Compounds.
Tanguy Jousselin-Oba,Masashi Mamada,Karen Wright,Jérôme Marrot,Chihaya Adachi,Chihaya Adachi,Abderrahim Yassar,Michel Frigoli +7 more
TL;DR: In this paper, the authors reported the synthesis and optoelectronic properties of TIPS-peri-pentacenopentacene (TIPS-PPP), a vertical extension of PEN and a low-band-gap material with remarkable stability.
Journal ArticleDOI
2,3-Dicyanopyrazino Phenanthroline Enhanced Charge Transfer for Efficient Near-Infrared Thermally Activated Delayed Fluorescent Diodes
Huiqin Wang,Bingjie Zhao,Chao Qu,Chunbo Duan,Zhe Li,Pengju Ma,Peng Chang,Chunmiao Han,Hui Xu +8 more
TL;DR: In this article , a NIR TADF molecule composed of 2,3-dicyanopyrazino phenanthroline (CNPP) as acceptor and triphenylamine as donor was reported, which achieved the state-of-the-art external quantum efficiencies of 8.69% and 2.02%.
References
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Highly efficient organic light-emitting diodes from delayed fluorescence
Hiroki Uoyama,Kenichi Goushi,Kenichi Goushi,Katsuyuki Shizu,Hiroko Nomura,Chihaya Adachi,Chihaya Adachi +6 more
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TL;DR: Extremely efficient sky-blue organic electroluminescence with external quantum efficiency of ≈37% is achieved in a conventional planar device structure using a highly efficient thermally activated delayed fluorescence emitter based on the spiroacridine-triazine hybrid.
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
TL;DR: This Focus Review describes the emerging class of near-infrared (NIR) organic compounds containing the conjugated polyene, polymethine, and donor-acceptor chromophores and exploration of their NIR-absorbing, Nir-fluorescence, and N IR-photosensitizing properties for potential applications in heat absorbers, solar cells, andNIR light-emitting diodes.