Results 81 to 90 of about 3,749 (233)

Teaching an Old Poly(arylene ether) New Tricks: Efficient Blue Thermally Activated Delayed Fluorescence

iScience, 2019
Summary: Polymer light-emitting diodes are attractive for optoelectronic applications owing to their brightness and ease of processing. However, often metals have to be inserted to increase the luminescence efficiency, and producing blue emitters is a ...
Xinrui Liu, Jiancheng Rao, Xuefei Li, Shumeng Wang, Junqiao Ding, Lixiang Wang   +5 more
doaj   +1 more source

Donor Extended Blue TADF Dendrimer for High‐Performance Solution‐Processed OLEDs

Advanced Science, EarlyView.
A dendronized MR‐TADF emitter, DOBNA‐SpAc‐DCz, was designed to improve solubility, hole transport, and exciton dynamics for solution‐processed OLEDs. Incorporation of ter(tert‐butylcarbazole) dendrons decreases ΔEST and accelerates RISC, yielding short delayed lifetimes (∼2 µs).
Mahni Fatahi, Yuka Yasuda, Ryo Kondo, Hironori Kaji, Eli Zysman‐Colman   +4 more
wiley   +1 more source

Acceptor-Donor-Acceptor π-Stacking Boosts Intramolecular Through-Space Charge Transfer towards Efficient Red TADF and High-Performance OLEDs

Research, 2022
Organic push-pull systems featuring through-space charge transfer (TSCT) excited states have been disclosed to be capable of exhibiting thermally activated delayed fluorescence (TADF), but to realize high-efficiency long-wavelength emission still remains
Chenglin Jiang, Jingsheng Miao, Danwen Zhang, Zhenhua Wen, Chuluo Yang, Kai Li   +5 more
doaj   +1 more source

Integrated Optoelectronic Model to Predict the External Quantum Efficiency of Single‐Layer TADF Organic Light‐Emitting Diodes

Advanced Electronic Materials, EarlyView.
An experimentally validated optoelectronic device model is presented to describe the efficiency and roll‐off behavior of single‐layer TADF OLEDs. By coupling charge transport, exciton dynamics, and optical outcoupling, the model reproduces the External Quantum Efficiency (EQE) across different emission layer thicknesses and temperatures, offering ...
Jawid Nikan, Kaiwen Guo, Yungui Li, Paul W. M. Blom, Gert‐Jan A. H. Wetzelaer   +4 more
wiley   +1 more source

Fluorene-fused Dimeric Carbonyl/amine Multiresonant Thermally Activated Delayed Fluorescence Emitter for Efficient Green OLEDs

, 2023
Multiresonant thermally activated delayed fluorescence (MR-TADF) materials possessing narrow emission spectra have attracted significant attention as emitters for use in high color purity organic light-emitting diodes (OLEDs).
Yan-Nan, Hu, Kai, Wang, Eli, Zysman-Colman, Dianming, Sun, Xiaohong, Zhang, Sen, Wu   +5 more
core   +1 more source

Highly Efficient Blue Thermally Activated Delayed Fluorescence Emitters Based on Multi-Donor Modified Oxygen-Bridged Boron Acceptor

Molecules, 2022
The employment of thermally activated delayed fluorescence (TADF) emitters is one of the most promising ways to realize the external quantum efficiency (EQE) of over 25% for organic light-emitting diodes (OLEDs).
Xin-Yue Meng, Zi-Qi Feng, You-Jun Yu, Liang-Sheng Liao, Zuo-Quan Jiang   +4 more
doaj   +1 more source

Dual Impact of Long‐Lived Localized Carriers Induced by Restricted Hole Transfer in Organic Photovoltaics and Photocatalytic Hydrogen Evolution

Advanced Energy Materials, EarlyView.
This work clarifies why organic semiconductors perform differently in photovoltaic devices and photocatalytic nanoparticles. By examining D18:Y5 and PM6:Y6 systems, we show how aggregation, exciton lifetime, and interfacial charge transfer behavior govern energy‐conversion pathways.
Gayoung Ham, Sanghyeok An, Wooteak Jung, Hyun Min Kwon, Seonghyeon Kang, Jaehyuk Lee, Sowon Kim, Changwoo Park, Damin Lee, Young Yong Kim, Sungjin Jo, Chang Yun Son, Sae Byeok Jo, Dae Sung Chung, Hyojung Cha   +14 more
wiley   +1 more source

Recent Advancement in Boron-Based Efficient and Pure Blue Thermally Activated Delayed Fluorescence Materials for Organic Light-Emitting Diodes

Frontiers in Chemistry, 2020
In the last few years, electron-deficient materials have been actively researched for application in organic light-emitting diode (OLED) as dopant and electron-transporting materials.
Hyuna Lee, Durai Karthik, Raju Lampande, Jae Hong Ryu, Jang Hyuk Kwon   +4 more
doaj   +1 more source

Heavy-Atom Effect Promotes Multi-Resonance Thermally Activated Delayed Fluorescence

, 2021
As one type of latest emitters with simultaneous high efficiency and color-purity, the development of multi-resonance thermally activated delayed fluorescence (MR-TADF) materials represents an important advancement for organic light-emitting diodes ...
Lisi, Zhan, Shaolong, Gong, Zhengqi, Xiao, Tao, Hua, Nengquan, Li, Xiaosong, Cao, Zhongyan, Huang, Changjiang, Zhou, Cheng, Zhong, Chuluo, Yang   +9 more
core   +1 more source

Accessing Sn≥2 States of a TADF Emitter by Femtosecond NIR Spectroscopy

Chemistry – A European Journal, EarlyView.
The depicted thermally activated delayed fluorescence (TADF) emitter was studied by femtosecond near‐infrared (NIR) spectroscopy. A prominent NIR transition was shown to be strongly solvent‐dependent, with implication for intersystem crossing in the compound.
Wiebke Haselbach, Jasmin Matthes, Andreas Prüfer, Simon L. Zimmermann, Monika Flörke, Thomas J. J. Müller, Peter Gilch, Barbara E. Nogueira de Faria   +7 more
wiley   +1 more source