Blue electroluminescent polymers with dopant–host systems and molecular dispersion features: polyfluorene as the deep blue host and 1,8-naphthalimide derivative units as the light blue dopants

2008 ◽  
Vol 18 (14) ◽  
pp. 1659 ◽  
Author(s):  
Jun Liu ◽  
Jianxin Cao ◽  
Shiyang Shao ◽  
Zhiyuan Xie ◽  
Yanxiang Cheng ◽  
...  
Keyword(s):  
Light Blue ◽  
Deep Blue ◽  
Molecular Dispersion ◽  
Electroluminescent Polymers

Photo and Cathodoluminescence in Cerium-Activated Yttrium-Aluminium Borates

2000 ◽  
Vol 621 ◽  
Author(s):  
V. Z. Mordkovich
Keyword(s):  
Continuous Wave ◽  
Host Lattice ◽  
Pulse Excitation ◽  
Pulse Laser Irradiation ◽  
Light Blue ◽  
Deep Blue ◽  
Yttrium Aluminium ◽  
Acceleration Voltage ◽  
Uv Excitation ◽  
Strong Activator

ABSTRACTCe3+ luminescence in Ce-activated yttrium aluminium borates was studied. Photoluminescnece was excited by continuous-wave UV or by pulse laser irradiation. Cathodoluminescence was excited at the acceleration voltage in the range 5 to 600 V. These phosphors show under continuous wave UV excitation three emission peaks: in near UV, deep blue and light blue ranges. The light blue peak at around 490 nm which may be connected to forbidden 2D3/2 → 2F7/2 transition appears in continuous wave-excited photoluminescence only and does not appear in cathodoluminescence nor under pulse excitation. The blue-emitting Ce- activated yttrium aluminium borates exhibit unusually strong activator ion-host lattice interaction. As a result a substantial red shift in the emission is induced by Ce concentration increase and complicated concentration dependence of the emission intensity is observed.

The Devil and the Deep Blue Lake: How Natural Area Acquisition and Stewardship Helps Protect the Major Drinking Reservoir in Northwestern Arkansas

2019 ◽  
Vol 39 (1) ◽  
pp. 78 ◽  
Author(s):  
Dustin T. Lynch ◽  
C. Theo Witsell ◽  
Bryan A. Rupar ◽  
William C. Holimon ◽  
Darrell W. Bowman
Keyword(s):  
Natural Area ◽  
Deep Blue ◽  
Blue Lake ◽  
The Devil

Tetraphenylbenzene-based AIEgens: the Horizontally Oriented Emitters for highly Efficient Non-doped Deep Blue OLEDs and Host for High-Performance Hybrid WOLEDs

2020 ◽  
Author(s):  
Pengbo Han ◽  
Zeng Xu ◽  
Chengwei Lin ◽  
Dongge Ma ◽  
Anjun Qin ◽  
...  
Keyword(s):  
High Performance ◽  
General Strategy ◽  
Flat Panel Displays ◽  
Light Emitting ◽  
Horizontal Orientation ◽  
Deep Blue ◽  
Full Color ◽  
High Emission ◽  
White Oleds ◽  
Low Efficiency

Deep blue organic-emitting fluorophores are crucial for application in white lighting and full color flat-panel displays but emitters with high color quality and efficiency are rare. Herein, novel deep blue AIE luminogens (AIEgens) with various donor units and an acceptor of cyano substituted tetraphenylbenzene (TPB) cores were developed and used to fabricate non-doped deep blue and hybrid white organic light-emitting diodes (OLEDs). Benefiting from its high emission efficiency and high proportion of horizontally oriented dipoles in the film state, the non-doped deep blue device based on CN-TPB-TPA realized a maximum external quantum efficiency 7.27%, with a low efficiency roll-off and CIE coordinates of (0.15, 0.08). Moreover, efficient two-color hybrid warm white OLEDs (CIE<sub>x,y</sub> = 0.43, 0.45) were achieved using CN-TPB-TPA as the blue-emitting layer and phosphor doped host, which realized maximum current, power, external quantum efficiencies 58.0 cd A<sup>-1</sup>, 60.7 lm W<sup>-1</sup> and 19.1%, respectively. This work provides a general strategy to achieve high performance, stable deep blue and hybrid white OLEDs by construction of AIEgens with excellent horizontal orientation

Highly Efficient Deep Blue Fluorescence Emitter Based on Highly Conjugated Boron Structure

2019 ◽  
pp. 822
Author(s):  
Hanjong Yoo ◽  
Daehyun Ahn ◽  
Hyuna Lee ◽  
Juyoung Lee ◽  
Janghyuk Kwon
Keyword(s):  
Blue Fluorescence ◽  
Highly Efficient ◽  
Deep Blue

High-efficiency, long-lifetime deep-blue organic light-emitting diodes

2021 ◽  
Vol 15 (3) ◽  
pp. 208-215 ◽  
Author(s):  
Soon Ok Jeon ◽  
Kyung Hyung Lee ◽  
Jong Soo Kim ◽  
Soo-Ghang Ihn ◽  
Yeon Sook Chung ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light ◽  
Long Lifetime

Novel Carbazole-based Multifunctional Materials with Hybridized Local and Charge-Transfer Excited State Acting as Deep Blue Emitters and Phosphorescent Hosts for Highly Efficient Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Haitao Zhou ◽  
Mengna Yin ◽  
Zhenhong Zhao ◽  
Yanqin Miao ◽  
Xin Jin ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Multifunctional Materials ◽  
Light Emitting ◽  
Highly Efficient ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Emitters

In this work, two carbazole- and benzo[d]oxazole-based novel multifunctional materials with hybridized local and charge-transfer (HLCT) characteristic, namely OCI and OCT, which could act as deep-blue fluorophors and phosphorescent hosts,...

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