Cited by Tetra-coordinated difluoroboron TADF emitter for sky-blue organic light-emitting diodes with 27.4% external quantum efficiency

Achieving Deep‐Blue Through‐Space Charge‐Transfer Emitter by Designing the Donor‐π‐Donor‐σ‐Acceptor Molecular Structure DOI

Peng Zuo,

Yue‐Jian Yang,

Fu‐Ming Liu

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: 12(23)

Published: May 16, 2024

Abstract In the realm of organic light‐emitting diode (OLED), through‐space charge transfer (TSCT) thermally activated delayed fluorescence (TADF) emitters have demonstrated remarkable achievements. Nevertheless, realizing both deep‐blue emission and high efficiency by TSCT strategy remains a persistent challenge. Here, novel donor‐π‐donor‐σ‐acceptor (D‐π‐D‐σ‐A) type emitter, namely D‐tCz‐BO, is formulated to investigate its performance in OLED. D‐tCz‐BO show narrow efficient TADF character ( λ PL = 448, FWHM 54 nm, Φ 82%, Δ E ST 0.09 eV). More importantly, OLED based on as emitter showed maximum external quantum (EQE max ) 20.5%, with Commission Internationale de l'Eclairage (CIE) coordinate (0.14, 0.12). This represents one best TSCT‐TADF date.

Language: Английский

Citations

Photo-induced room temperature phosphorescence and thermally activated photochromism based on thianthrene derivatives DOI

Nan Li, Yunsheng Wang, Zhen Li

et al.

Journal of Materials Chemistry C, Journal Year: 2024, Volume and Issue: 12(31), P. 12045 - 12053

Published: Jan. 1, 2024

Thianthrene derivatives demonstrate reversible photochromism and photoinduced RTP, with TN-2Nap showing significant thermal control due to low reorganization energy π-conjugation.

Language: Английский

Citations

Efficient tetradentate palladium(II) emitters for sky-blue OLEDs through tuning triplet excited states DOI

Kewei Xu,

Jianbing Zheng,

Feng Zhan

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 159948 - 159948

Published: Jan. 1, 2025

Language: Английский

Citations

High‐Efficiency Deep Blue OLEDs With Hot Exciton Materials as Emitters and Hosts DOI

Lveting Zhang,

Dehua Hu,

Shipan Wang

et al.

Advanced Optical Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 2, 2025

Abstract Achieving highly efficient deep‐blue emissive materials with Commission Internationale de l'Eclairage (CIE) coordinates approaching BT.2020 standard remains a significant challenge in organic light‐emitting diodes (OLEDs). Here, three novel deep blue emitters (namely PAF, PAFN, and PAPF) are developed through twisting substitution of anthracene phenanthridazole unit dibenzofuran derivatives. All demonstrate hot exciton characteristics, featured by reverse intersystem crossing from high‐lying triplet states to singlet states, which is conducive harvesting the excitons OLED applications. Detailed photophysical analyses indicate that lowest state these localized excited state, ensuring emission. The non‐doped based on PAPF exhibited emission maximum external quantum efficiency (EQE max ) 8.6% CIE (0.150, 0.057). binary doped as host organoboron‐based fluorophore guest achieved an EQE 10%, narrow full width at half 18 nm. It also worth noting exceptional minimal roll‐off = 9.0% 1000 cd m − 2 realized current host‐guest system. This study provides valuable insights into developing wide‐bandgap for stable, high‐performance OLEDs.

Language: Английский

Citations

Intramolecular Hydrogen Bonding Rigidifying Flexible Bridge for Solution- and Vacuum-Processed TSCT-TADF Emitters DOI

Zhang-Li Cheng,

Ming Zhang,

Yi Yuan

et al.

Organic Letters, Journal Year: 2024, Volume and Issue: 26(22), P. 4716 - 4720

Published: May 27, 2024

To realize strong donor-acceptor face-to-face stacking for efficient through-space charge transfer-type thermally activated delayed fluorescence, a conceptually new design strategy is proposed to couple flexible bridges with adequate rigidity via built-in intramolecular hydrogen bonds (IHBs). The resulting emitter ACE-CN has planarized benzyl methyl ether bridge self-anchored by the C-H···O IHB and shows high photoluminescence quantum efficiency of 93%. solution- vacuum-processed devices exhibited external efficiencies 11.8% 24.7%, respectively.

Language: Английский

Citations

Crafting host materials for narrowband blue OLEDs with low efficiency roll-off by the medium-ring strategy DOI

Yuanyuan Bao,

Anping Luo,

Jingbo Lan

et al.

Science China Chemistry, Journal Year: 2024, Volume and Issue: 67(10), P. 3265 - 3270

Published: July 23, 2024

Language: Английский

Citations

Versatile Spiral Donor‐Based Thermally Activated Delayed Fluorescence Materials for Highly Efficient TADF‐OLED and TSF‐OLED Applications DOI

Xilin Mu,

Deli Li,

Denghui Liu

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 9, 2024

Abstract Herein, a design strategy is explored for thermally activated delayed fluorescence (TADF) materials by employing the meta ‐linkage of spiral‐donors 10H‐spiro[acridine‐9,9'‐thioxanthene] (DspiroS) and 10',10'‐dimethyl‐10H,10'H‐spiro[acridine‐9,9'‐anthracene] (DspiroAc) to robust acceptor 2,4,6‐triphenyl‐1,3,5‐triazine (TRZ). Two distinct TADF materials, m‐DspiroS‐TRZ m‐DspiroAc‐TRZ, exhibiting unique photophysical properties performance characteristics were synthesized. Interestingly, even subtle modifications in molecular architecture can significantly impact organization their aggregated state, thereby governing inducing corresponding alterations photoelectric characteristics. Notably, m ‐DspiroS‐TRZ exhibits superior exciton dynamics data, achieving high photoluminescence quantum yield (PLQY) value up 95.9% rapid reverse intersystem crossing (RISC) rate (𝒌 𝑹𝑰𝑺𝑪 ) 1.0 × 10 6 s −1 . This positions as potentially excellent terminal emissive sensitizing host material, inspiring further exploration its applications electroluminescence. Consequently, organic light‐emitting device (TADF‐OLED) TADF‐sensitized (TSF‐OLED) based on have achieved maximum external efficiencies (EQEs) 31.8% 34.5%, respectively, demonstrating significant versatile potential ‐DspiroS‐TRZ.

Language: Английский

Citations

Thermally activated delayed fluorescence dendrimers with strategic dendrons to construct highly efficient solution-processed OLEDs DOI

Jie Wu, Xiang Wang,

Wenwen Tian

et al.

Journal of Industrial and Engineering Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 1, 2024

Language: Английский

Citations

Boron cluster-based TADF emitter via through-space charge transfer enabling efficient orange-red electroluminescence DOI

Xiao Yu,

Dongyue Cui,

Mengmeng Wang

et al.

Chinese Chemical Letters, Journal Year: 2024, Volume and Issue: unknown, P. 110520 - 110520

Published: Sept. 1, 2024

Language: Английский

Citations

Highly Efficient and Bright Blue OLEDs via TSCT‐TADF Molecule Regulated by Indolo[3,2,1‐jk]Carbazole DOI

Haoqing Guo,

Zhenyu Tang,

Lefan Gong

et al.

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 10, 2024

Abstract Thermally activated delayed fluorescence (TADF) materials with the through‐space charge transfer (TSCT) effects can provide a useful approach to efficiently utilize dark state triplet excitons through an efficient reverse intersystem crossing process. TSCT‐TADF emitters PCzoTrz‐ICz small ∆E ST values and high photoluminescence quantum yield is designed synthesized using common acceptor triazine, donor 3,6‐diphenylcarbazole Indolo[3,2,1‐jk]carbazole which rigid π ‐conjugated group thermal stability. The doped‐organic light‐emitting diodes as exhibit tolerance host different polarity transport properties, doped devices in 2,8‐bis(diphenylphosphoryl)dibenzofuran even realizes maximum external efficiency (EQE max ) of 32.5% current (CE 74.1 cd A −1 , higher than EQE 28.1% CE 64.8 PCzoTrz. Moreover, be used highly sensitizers for narrow band blue emitter v ‐DABNA, achieves more 33.3%, luminance 26,291 m −2 42.7 index 237 CIE y .

Language: Английский

Citations