Journal Article10.1002/ANIE.201402992
Luminous Butterflies: Efficient Exciton Harvesting by Benzophenone Derivatives for Full-Color Delayed Fluorescence OLEDs†
Sae Youn Lee,Takuma Yasuda,Takuma Yasuda,Takuma Yasuda,Yu Seok Yang,Qisheng Zhang,Chihaya Adachi,Chihaya Adachi +7 more
531
TL;DR: Organic light-emitting diodes with these benzophenone derivatives doped in the emissive layer can generate electroluminescence ranging from blue to orange-red and white, with maximum external quantum efficiencies of up to 14.3%.
read more
Abstract: Butterfly-shaped luminescent benzophenone derivatives with small energy gaps between their singlet and triplet excited states are used to achieve efficient full-color delayed fluorescence. Organic light-emitting diodes (OLEDs) with these benzophenone derivatives doped in the emissive layer can generate electroluminescence ranging from blue to orange-red and white, with maximum external quantum efficiencies of up to 14.3%. Triplet excitons are efficiently harvested through delayed fluorescence channels.
read more
Chat with Paper
AI Agents for this Paper
Find similar papers on Google Scholar, PubMed and Arxiv
Write a critical review of this paper
Analyze citations of this paper to find unaddressed research gaps
Citations
Inheriting the Characteristics of TADF Small Molecule by Side-Chain Engineering Strategy to Enable Bluish-Green Polymers with High PLQYs up to 74% and External Quantum Efficiency over 16% in Light-Emitting Diodes
TL;DR: Thermally activated delayed fluorescence polymers are designed and synthesized by grafting the TADF emitter to the side chain of the polycarbazole backbone and achieve a maximal external quantum efficiency of 16.1% at a luminance of around 100 cd m-2.
214
Highly Efficient Deep-Blue OLEDs using a TADF Emitter with a Narrow Emission Spectrum and High Horizontal Emitting Dipole Ratio
TL;DR: By combining the effects, the OLED utilizing DBA-SAB as the emitter exhibits a maximum external quantum efficiency (EQE) of 25.7% and 1931 Commission Internationale de l'éclairage (CIE) coordinates of (0.144, 0.212).
213
Highly efficient blue thermally activated delayed fluorescent OLEDs with record-low driving voltages utilizing high triplet energy hosts with small singlet–triplet splittings
TL;DR: In this paper, four carbazolyl benzonitrile derivatives are facilely prepared with restrained conjugate lengths to maintain high triplet energies while their highly twisted structures spatially separate the frontier orbital distribution to achieve relatively low ΔESTs.
The Design of Dual Emitting Cores for Green Thermally Activated Delayed Fluorescent Materials
TL;DR: The quantum and power efficiencies of the TADF devices were enhanced by the dual emitting cores.
205
Manipulation of Molecular Aggregation States to Realize Polymorphism, AIE, MCL, and TADF in a Single Molecule
Bin Huang,Bin Huang,Wen-Cheng Chen,Zijing Li,Jinfeng Zhang,Weijun Zhao,Yan Feng,Ben Zhong Tang,Chun-Sing Lee +8 more
TL;DR: It is shown for the first time that TADF properties of a compound can be systematically tuned via its aggregation state and provides a new strategy for the investigation and application of multifunctional organic materials.
195
References
Highly efficient phosphorescent emission from organic electroluminescent devices
Marc A. Baldo,D. F. O’Brien,Yujian You,Andrei Shoustikov,Scott Sibley,Scott Sibley,Mark E. Thompson,Stephen R. Forrest +7 more
TL;DR: In this article, a host material doped with the phosphorescent dye PtOEP (PtOEP II) was used to achieve high energy transfer from both singlet and triplet states.
7.7K
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
TL;DR: A class of metal-free organic electroluminescent molecules in which the energy gap between the singlet and triplet excited states is minimized by design, thereby promoting highly efficient spin up-conversion from non-radiative triplet states to radiative singlet states while maintaining high radiative decay rates.
•Book
Fundamentals of Photonics
Bahaa E. A. Saleh,Malvin C. Teich,Richard E. Slusher +2 more
- 15 Aug 1991
TL;DR: The Fundamentals of Photonics, Third Edition as discussed by the authors is a self-contained and up-to-date introductory-level textbook that thoroughly surveys this rapidly expanding area of engineering and applied physics.
5.1K
Very high-efficiency green organic light-emitting devices based on electrophosphorescence
TL;DR: In this paper, the performance of an organic light-emitting device employing the green electrophosphorescent material, fac tris(2-phenylpyridine) iridium [Ir(ppy)3] doped into a 4,4′-N,N′-dicarbazole-biphenyl host was described.
3.8K
Nearly 100% internal phosphorescence efficiency in an organic light emitting device
TL;DR: In this paper, the authors demonstrate very high efficiency electrophosphorescence in organic light-emitting devices employing a phosphorescent molecule doped into a wide energy gap host, achieving a maximum external quantum efficiency of 19.0±1.0 and luminous power efficiency of 60±5 lm/W.
3.6K