Constructing Low-Triplet-Energy Hosts for Highly Efficient Blue PHOLEDs: Controlling Charge and Exciton Capture in Doping Systems

2013 ◽  
Vol 25 (24) ◽  
pp. 4966-4976 ◽  
Author(s):  
Chunmiao Han ◽  
Fangchao Zhao ◽  
Zhen Zhang ◽  
Liping Zhu ◽  
Hui Xu ◽  
...  
Keyword(s):  
Triplet Energy ◽  
Highly Efficient ◽  
In Doping

Simultaneous realization of high-efficiency, low-drive voltage, and long lifetime TADF OLEDs by multifunctional hole-transporters

2020 ◽  
Vol 8 (21) ◽  
pp. 7200-7210 ◽  
Author(s):  
Takahiro Kamata ◽  
Hisahiro Sasabe ◽  
Nozomi Ito ◽  
Yoshihito Sukegawa ◽  
Ayato Arai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Triplet Energy ◽  
Energy Hole ◽  
Light Emitting ◽  
Drive Voltage ◽  
Light Emitting Devices ◽  
Thermally Activated ◽  
Highly Efficient ◽  
Organic Light ◽  
Long Lifetime

A smart high-triplet energy hole-transporter exhibits significant stability in the anion state realizing record-breaking highly efficient and long-living thermally activated delayed fluorescent (TADF) organic light-emitting devices (OLEDs).

Highly Efficient Light-Harvesting System Based on a Phosphorescent Acceptor Coupled with Dendrimer Donors via Singlet−Singlet and Triplet−Triplet Energy Transfer

2007 ◽  
Vol 19 (15) ◽  
pp. 3673-3680 ◽  
Author(s):  
Tae-Hyuk Kwon ◽  
Myoung Ki Kim ◽  
Jongchul Kwon ◽  
Dae-Yup Shin ◽  
Su Jin Park ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Light Harvesting ◽  
Triplet Energy ◽  
Highly Efficient ◽  
Triplet Energy Transfer

Carbazolylphosphines and carbazolylphosphine oxides: facilely synthesized host materials with tunable mobilities and high triplet energy levels for blue phosphorescent OLEDs

2017 ◽  
Vol 5 (29) ◽  
pp. 7344-7351 ◽  
Author(s):  
Zifeng Zhao ◽  
Gang Yu ◽  
Qiaowen Chang ◽  
Xiaochen Liu ◽  
Yang Liu ◽  
...  
Keyword(s):  
Energy Levels ◽  
Triplet Energy ◽  
Charge Mobility ◽  
Highly Efficient ◽  
Host Materials ◽  
Blue Phosphorescent

Selectively modulating the charge mobility of host materials by the oxidation of phosphines for highly efficient blue phosphorescent OLEDs.

scholarly journals Boron-Enabled Geometric Isomerization of Small Alkene Fragments via Selective Energy Transfer Catalysis

2020 ◽  
Author(s):  
John James Molloy ◽  
Michael Schäfers ◽  
Max Wienhold ◽  
Tobias Morack ◽  
Constantin G. Daniliuc ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Retinoic Acid ◽  
Visual Cycle ◽  
Triplet Energy ◽  
Molecular Precursors ◽  
Highly Efficient ◽  
Geometric Isomerization ◽  
Gating Mechanism ◽  
Triplet Energy Transfer

The mammalian visual cycle epitomizes the importance of complex polyenes in biology. However, isomerization-based strategies to enable the sterodivergent construction of these important biomolecules from geometrically defined alkene linchpins remain conspicuously underdeveloped. Mitigating the thermodynamic constraints inherent to isomerization is further frustrated by the considerations of atom efficiency in idealized low molecular precursors. Herein, we report a general ambiphilic C3 scaffold that can be isomerized and bi-directionally extended. Predicated on highly efficient triplet energy transfer, the selective isomerization of β-15 borylacrylates is contingent on the participation of the boron p-orbital in the substrate chromophore. Rotation of the C(sp2)-B bond by 90° in the product renders re-excitation inefficient and endows directionality. This subtle stereoelectronic gating mechanism enables the stereocontrolled syntheses of well-defined retinoic acid derivatives.<br>

scholarly journals Boron-Enabled Geometric Isomerization of Small Alkene Fragments via Selective Energy Transfer Catalysis

2020 ◽  
Author(s):  
John James Molloy ◽  
Michael Schäfers ◽  
Max Wienhold ◽  
Tobias Morack ◽  
Constantin G. Daniliuc ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Retinoic Acid ◽  
Visual Cycle ◽  
Triplet Energy ◽  
Molecular Precursors ◽  
Highly Efficient ◽  
Geometric Isomerization ◽  
Gating Mechanism ◽  
Triplet Energy Transfer

The mammalian visual cycle epitomizes the importance of complex polyenes in biology. However, isomerization-based strategies to enable the sterodivergent construction of these important biomolecules from geometrically defined alkene linchpins remain conspicuously underdeveloped. Mitigating the thermodynamic constraints inherent to isomerization is further frustrated by the considerations of atom efficiency in idealized low molecular precursors. Herein, we report a general ambiphilic C3 scaffold that can be isomerized and bi-directionally extended. Predicated on highly efficient triplet energy transfer, the selective isomerization of β-15 borylacrylates is contingent on the participation of the boron p-orbital in the substrate chromophore. Rotation of the C(sp2)-B bond by 90° in the product renders re-excitation inefficient and endows directionality. This subtle stereoelectronic gating mechanism enables the stereocontrolled syntheses of well-defined retinoic acid derivatives.<br>

Using an Organic Molecule with Low Triplet Energy as a Host in a Highly Efficient Blue Electrophosphorescent Device

2014 ◽  
Vol 53 (8) ◽  
pp. 2147-2151 ◽  
Author(s):  
Cong Fan ◽  
Liping Zhu ◽  
Tengxiao Liu ◽  
Bei Jiang ◽  
Dongge Ma ◽  
...  
Keyword(s):  
Organic Molecule ◽  
Triplet Energy ◽  
Highly Efficient

A high triplet energy, high thermal stability oxadiazole derivative as the electron transporter for highly efficient red, green and blue phosphorescent OLEDs

2015 ◽  
Vol 3 (7) ◽  
pp. 1491-1496 ◽  
Author(s):  
Cheng-Hung Shih ◽  
P. Rajamalli ◽  
Cheng-An Wu ◽  
Ming-Jai Chiu ◽  
Li-Kang Chu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Glass Transition ◽  
Electron Mobility ◽  
Energy Gap ◽  
High Thermal Stability ◽  
Triplet Energy ◽  
Highly Efficient ◽  
Blue Phosphorescent

A high glass transition, triplet energy gap and electron mobility material, TPOTP, is readily synthesized. It can serve as an efficient universal electron transporter and exciton blocker for blue, green and red phosphorescent OLEDs.

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