Managing Intersegmental Charge‐Transfer and Multiple Resonance Alignments of D 3 ‐A Typed TADF Emitters for Red OLEDs with Improved Efficiency and Color Purity

2021 ◽  
pp. 2101789
Author(s):  
Xiao‐Chun Fan ◽  
Kai Wang ◽  
Yi‐Zhong Shi ◽  
Jia‐Xiong Chen ◽  
Feng Huang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Color Purity ◽  
Multiple Resonance ◽  
Red Oleds

scholarly journals Molecular Design of Thermally Activated Delayed Fluorescent Emitters for Narrowband Orange−Red OLEDs: Boosted by a Cyano-Functionalization Strategy

2021 ◽  
Author(s):  
Yang Liu ◽  
Xin Xiao ◽  
Ran You ◽  
Zhengyang Bin ◽  
Jingsong You
Keyword(s):  
Molecular Design ◽  
Design Strategy ◽  
Color Purity ◽  
Thermally Activated ◽  
Red Oleds

The establishment of simple molecular design strategy to realize red-shifted emission while maintaining good color purity for multi-resonance induced thermally activated delayed fluorescent (MR-TADF) materials remains an appealing yet challenging...

Efficient and thermally stable non-doped red OLEDs based on a “bird-like” donor–acceptor fluorophore with aggregation induced emission enhancement and intramolecular charge transfer

2017 ◽  
Vol 5 (30) ◽  
pp. 7436-7440 ◽  
Author(s):  
Ezhakudiyan Ravindran ◽  
Narayanasastri Somanathan
Keyword(s):  
Charge Transfer ◽  
Rational Design ◽  
Intramolecular Charge Transfer ◽  
Thermally Stable ◽  
Aggregation Induced Emission ◽  
Emission Enhancement ◽  
Donor Acceptor ◽  
Red Oleds

The rational design of an efficient and thermally stable non-doped red fluorophore material with tunable AIEE and ICT characteristics triggers enhanced OLED performances.

Improvements in Color Purity and Stability of Red OLEDs by Sensitizer Doping

2011 ◽  
Vol 158 (12) ◽  
pp. J394 ◽  
Author(s):  
Su-Hua Yang ◽  
Chi-Hung Chuang ◽  
Szu-Chi Huang
Keyword(s):  
Color Purity ◽  
Red Oleds

scholarly journals Attaching Strong Auxiliary Acceptor onto B-N-Containing Multiple Resonance Framework and Achieving Highly Efficient Electroluminescence with Ultrahigh Color Purity

2021 ◽  
Author(s):  
Chenglong Li ◽  
Yue Wang ◽  
Yincai Xu ◽  
Zhiqaing Li ◽  
Jiaxuan Wang ◽  
...  
Keyword(s):  
Light Emitting Diode ◽  
Bathochromic Shift ◽  
Wavelength Region ◽  
Coupling Reaction ◽  
Green Emission ◽  
Delayed Fluorescence ◽  
Color Purity ◽  
Suzuki Coupling Reaction ◽  
Multiple Resonance ◽  
Low Efficiency

<p>The development and enrichment of organic materials with narrowband emission in longer wavelength region beyond 515 nm still remains a great challenge. Herein, a series of unique narrowband green thermally activated delayed fluorescence (TADF) emitters has been constructed based on a synthetic strategy by localized attachment of acceptor onto B-N-containing multiple resonance (MR) framework. The precise modulation of acceptor is an ingenious approach for achieving bathochromic shift and narrowband emission, simultaneously. Furthermore, an important synthetic methodology has been proposed to functionalize MR skeleton and generate a universal building block, which can be utilized to construct multifarious TADF materials with ultrahigh color purity through a simple one-step Suzuki coupling reaction. The DtCzB-TPTRZ-based organic light-emitting diode (OLED) exhibits pure green emission with Commission Internationale de L’Eclairage (CIE) coordinates of (0.23, 0.68), and achieves remarkable maximum external quantum efficiency (EQE) of 30.6% with low efficiency roll-off.</p>

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