Results 61 to 70 of about 3,749 (233)

Diindolocarbazole – Achieving Multiresonant Thermally Activated Delayed Fluorescence Without The Need for Acceptor Units

, 2021
In this work we present a new multi-resonance thermally activated delayed fluorescence (MR-TADF) emitter paradigm, demonstrating that the structure need not require the presence of acceptor atoms.
Yoann, Olivier, David, Beljonne, David, Hall, Alexandra, Slawin, Kleitos, Stavrou, EImantas, Duda, Anna, Koehler, Andrew, Monkman, Eli, Zysman-Colman, Sergey, Bagnich, Stuart, Warriner, Andrew, Danos   +11 more
core   +1 more source

Color‐Pure Organic Luminophores: Characteristics, Definitions, Physical Basis and Fundamental Design Principles

Angewandte Chemie, EarlyView.
Color‐pure all‐organic emitters, i.e., with narrow spectral characteristics, are intensively studied for high‐definition organic LEDs and multi‐color bioimaging. In order to guide targeted materials design, this educative review discusses spectral characteristics, proper definitions and units, and the physical basis of spectral broadening, to distill ...
Johannes Gierschner, Sunwu Song, Siyang Feng, Liangxuan Wang, Miguel Ródenas, Begoña Milián‐Medina, Min Sang Kwon   +6 more
wiley   +2 more sources

Thermally Activated Delayed Fluorescence from Locally Excited State: Theoretical Prediction and Experimental Validation

, 2020
As is well known, the thermally activated delayed fluorescence (TADF) is always generated from charge-transfer (CT) excited states in electron-donor (D) – electron-acceptor (A) systems.
Hua, Geng, Guo, Wang, Xiaoxiao, Xiao, Shuai, Li, Qian, Peng, Yi, Liao, Yuai, Duan, Zhigang, Shuai, Hongbing, Fu   +8 more
core   +1 more source

Measurements and modelling of the kinetics of thermally activated delayed fluorescence

, 2023
Efficient organic light-emitting diodes (OLEDs) enable the commercialisation of energy efficient and high contrast displays, and are being exploited increasingly in telecommunication and biomedical applications.
Diesing, Stefan
core   +1 more source

3D-Printed Optical Volatile Organic Compound Sensors Based on Donor-Substituted Coumarin Thermally Activated Delayed Fluorescence Emitters. [PDF]

Small Sci
Donor–acceptor coumarin emitters displaying thermally activated delayed fluorescence (TADF) are formulated into photocurable resins and processed by digital light processing (DLP) 3D printing. The resulting printed materials show a sensitive and repeatable photoluminescence response when exposed to volatile organic compounds (VOCs).
Paniziutti S, Piras MV, Chiappone A, Podda E, Ricci PC, Porcu S, Matulaitis T, Zysman-Colman E, Secci F.   +8 more
europepmc   +2 more sources

Electron-withdrawing Group Modified Carbazolophane Donors for Deep Blue Thermally Activated Delayed Fluorescence OLEDs

, 2021
We report two blue-emitting thermally activated delayed fluorescence (TADF) compounds employing a substituted carbazolophane (Czp) donor (indolo[2.2]paracyclophane).
Zhen, Zhang, Ifor, Samuel, Eduard, Spuling, Maria, Kaczmarek, Eli, Zysman-Colman, Yichuan, Wang, Zahid, Hassan, Stefan, Braese, Abhishek, Kumar Gupta   +8 more
core   +1 more source

Unified Analytical Framework for Understanding the Operational Stability of Blue Phosphorescent OLEDs: Quantitative Insights Into Exciton Recycling and Bimolecular Interactions

Advanced Functional Materials, EarlyView.
Blue phosphorescent OLEDs remain limited by poor operational stability. Here, a unified analytical framework integrating transient photoluminescence and magneto‐electroluminescence is developed to correlate intrinsic material photophysics with electrically driven degradation.
Hakjun Lee, Bum June Park, Taekyung Kim
wiley   +1 more source

Role of the Recombination Zone in Organic Light‐Emitting Devices

Advanced Materials, EarlyView.
This review summarizes the critical role of the recombination zone in organic light‐emitting diodes (OLEDs). We highlight that broadening the recombination zone in OLEDs based on emissive layers with balanced charge transport and high photoluminescence quantum yields provides a promising route toward achieving both long operational lifetime and high ...
Yungui Li, Karl Leo
wiley   +1 more source

Excited state modulation in Donor-Substituted Multi-resonant Thermally Activated Delayed Fluorescence Emitters

, 2022
Examples of multi-resonant thermally activated delayed fluorescence (MR-TADF) emitters that emit at longer wavelengths remain rare. To reach that goal, we decorate different numbers and types of electron-donors about a central MR-TADF core, DiKTa ...
Yoann, Olivier, David, Beljonne, Ifor, Samuel, David, Hall, Junyi, Gong, Subeesh, Madayanad Suresh, Eli, Zysman-Colman, Kou, Yoshida, Thomas, Sayner, Sen, Wu, Wenbo, Li   +10 more
core   +1 more source

Dipole Moment‐ and Molecular Orbital‐Engineered Phosphine Oxide‐Free Host Materials for Efficient and Stable Blue Thermally Activated Delayed Fluorescence

Advanced Science, 2022
To utilize thermally activated delayed fluorescence (TADF) technology for future displays, it is necessary to develop host materials which harness the full potential of blue TADF emitters. However, no publication has reported such hosts yet. Although the
Soo‐Ghang Ihn, Daun Jeong, Eun Suk Kwon, Sangmo Kim, Yeon Sook Chung, Myungsun Sim, Jun Chwae, Yasushi Koishikawa, Soon Ok Jeon, Jong Soo Kim, Joonghyuk Kim, Sungho Nam, Inkoo Kim, Sangho Park, Dae Sin Kim, Hyeonho Choi, Sunghan Kim   +16 more
doaj   +1 more source