Theoretical Design of Blue-Color Phosphorescent Complexes for Organic Light-Emitting Diodes: Emission Intensities and Nonradiative Transition Rate Constants in Ir(ppy)2(acac) Derivatives

2021 ◽  
Author(s):  
Shiro Koseki ◽  
Masaki Yoshii ◽  
Toshio Asada ◽  
Yuichi Fujimura ◽  
Takeshi Matsushita ◽  
...  
Keyword(s):  
Rate Constants ◽  
Transition Rate ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Blue Color ◽  
Nonradiative Transition ◽  
Light Emitting ◽  
Organic Light ◽  
Theoretical Design

Achieving High Efficiency and Pure Blue Color in Hyperfluorescence Organic Light Emitting Diodes using Organo-Boron Based Emitters

2021 ◽  
Author(s):  
Kenkera Naveen ◽  
Hyuna Lee ◽  
Ramanaskanda Braveenth ◽  
Durai Karthik ◽  
Ki Yang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Resonance Energy Transfer ◽  
Resonance Energy ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Blue Color ◽  
Orientation Factor ◽  
Light Emitting ◽  
Organic Light

Abstract In the field of organic light emitting diodes (OLEDs), organo-boron based thermally activated delayed fluorescence (TADF) emitters have reached great achievement. However, it is still challenging to achieve pure blue color (CIE y < 0.20) along with high efficiencies. To overcome these hurdles, hyperfluorescence (HF) suggest a key strategy in future OLED applications. Here, we report two TADF materials, pMDBA-DI and mMDBA-DI. Further, a pure blue multi resonance type tert-butyl substituted fluorescence emitter, t-Bu-ν-DABNA was also synthesized. Among our synthesized TADF materials based pure blue HF devices, mMDBA-DI as TADF sensitized host with t-Bu-ν-DABNA fluorescence emitter exhibited a high external quantum efficiency of 40.7% (Lambertian assumption) along with narrow emission with full width at half maximum of 19 nm (CIE y = 0.15). Moreover, we analyzed that such high device efficiency is mainly attributed to the high orientation factor, enhanced photoluminescence quantum yield, and a good TADF characteristic of t-Bu-ν-DABNA with high Förster resonance energy transfer.

Phosphor sensitized thermally activated delayed fluorescence organic light-emitting diodes with ideal deep blue device performances

2019 ◽  
Vol 7 (28) ◽  
pp. 8562-8568 ◽  
Author(s):  
Kyung Hyung Lee ◽  
Jun Yeob Lee
Keyword(s):  
External Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Blue Color ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Deep Blue ◽  
Organic Light

Phosphorescence sensitized thermally activated delayed fluorescent organic light-emitting diodes realized a high external quantum efficiency of 24.8% and deep blue color coordinates of (0.131, 0.107).

scholarly journals Achieving High Efficiency and Pure Blue Color in Hyperfluorescence Organic Light Emitting Diodes using Organo‐Boron Based Emitters

2021 ◽  
pp. 2110356
Author(s):  
Kenkera Rayappa Naveen ◽  
Hyuna Lee ◽  
Ramanaskanda Braveenth ◽  
Durai Karthik ◽  
Ki Joon Yang ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Blue Color ◽  
Light Emitting ◽  
Organic Light

Energy‐Harvesting Blue Color Filters for Organic Light‐Emitting Diodes

2020 ◽  
Vol 8 (20) ◽  
pp. 2000873
Author(s):  
Soyeong Jeong ◽  
Seonghee Kim ◽  
Hongkyu Kang ◽  
Kwanghee Lee
Keyword(s):  
Energy Harvesting ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Blue Color ◽  
Light Emitting ◽  
Organic Light ◽  
Color Filters

Fabrication and Characterization of Blue Organic Light-emitting Diodes

2011 ◽  
Author(s):  
Merric Srour ◽  
Richard Fu ◽  
Steven Blomquist ◽  
Jianmin Shi ◽  
Eric Forsythe ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Fabrication And Characterization
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