Deep Blue Emission of All-Bromide-Based Cesium Lead Perovskite Nanocrystals

2019 ◽  
Vol 124 (2) ◽  
pp. 1617-1622 ◽  
Author(s):  
Huafeng Shi ◽  
Xiaoli Zhang ◽  
Xiaowei Sun ◽  
Xinhai Zhang
Keyword(s):  
Blue Emission ◽  
Perovskite Nanocrystals ◽  
Deep Blue

scholarly journals Enhanced Crystallinity and Luminescence Characteristics of Hexagonal Boron Nitride Doped with Cerium Ions According to Tempering Temperatures

Materials ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 193
Author(s):  
Jae Yong Jung ◽  
Juna Kim ◽  
Yang Do Kim ◽  
Young-Kuk Kim ◽  
Hee-Ryoung Cha ◽  
...  
Keyword(s):  
Rare Earth ◽  
Boron Nitride ◽  
Uv Light ◽  
Hexagonal Boron Nitride ◽  
Heating Temperature ◽  
Blue Emission ◽  
Deep Blue ◽  
Cerium Ion ◽  
Luminescence Characteristics ◽  
Enhanced Crystallinity

Hexagonal boron nitride was synthesized by pyrolysis using boric acid and melamine. At this time, to impart luminescence, rare earth cerium ions were added to synthesize hexagonal boron nitride nanophosphor particles exhibiting deep blue emission. To investigate the changes in crystallinity and luminescence according to the re-heating temperature, samples which had been subjected to pyrolysis at 900 °C were subjected to re-heating from 1100 °C to 1400 °C. Crystallinity and luminescence were enhanced according to changes in the reheating temperature. The synthesized cerium ion-doped hexagonal boron nitride nanoparticle phosphor was applied to the anti-counterfeiting field to prepare an ink that can only be identified under UV light.

High performance full color OLEDs based on a class of molecules with dual carrier transport channels and small singlet–triplet splitting

2015 ◽  
Vol 51 (53) ◽  
pp. 10632-10635 ◽  
Author(s):  
Chenglong Li ◽  
Shipan Wang ◽  
Weiping Chen ◽  
Jinbei Wei ◽  
Guochun Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Carrier Transport ◽  
Blue Emission ◽  
Deep Blue ◽  
Full Color ◽  
Triplet Splitting ◽  
Transport Channels

The strong deep blue emission, good ambipolar carrier transport and small singlet–triplet splitting characteristics allow PPI-PPITPA and PPI-PPIPCz as emitting materials and hosts to fabricate high performance full color OLEDs.

scholarly journals Efficient Exciplex-Based Deep-Blue Organic Light-Emitting Diodes Employing a Bis(4-fluorophenyl)amine-Substituted Heptazine Acceptor

Molecules ◽  
2021 ◽  
Vol 26 (18) ◽  
pp. 5568
Author(s):  
Jie Li ◽  
Heqi Gong ◽  
Jincheng Zhang ◽  
Hui Liu ◽  
Li Tao ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Organic Light ◽  
High Maximum ◽  
Exciplex Emission ◽  
Amine Groups

The realization of a deep-blue-emitting exciplex system is a herculean task in the field of organic light-emitting diodes (OLEDs) on account of a large red-shifted and broadened exciplex emission spectrum in comparison to those of the corresponding single compounds. Herein, 2,5,8-tris(di(4-fluorophenyl)amine)-1,3,4,6,7,9,9b-heptaazaphenalene (HAP-3FDPA) was designed as an electron acceptor by integrating three bis(4-fluorophenyl)amine groups into a heptazine core, while 1,3-di(9H-carbazol-9-yl)benzene (mCP) possessing two electron-donating carbazole moieties was chosen as the electron donor. Excitingly, the exciplex system of 8 wt% HAP-3FDPA:mCP exhibited deep-blue emission and a high photoluminescence quantum yield of 53.2%. More importantly, an OLED containing this exciplex system as an emitting layer showed deep-blue emission with Commission Internationale de l’Eclairage coordinates of (0.16, 0.12), a peak luminance of 15,148 cd m−2, and a rather high maximum external quantum efficiency of 10.2% along with a low roll-off. This study not only reports an efficient exciplex-based deep-blue emitter but also presents a feasible pathway to construct highly efficient deep-blue OLEDs based on exciplex systems.

Dibenzo[f,h]furo[2,3-b]quinoxaline-based molecule scaffold as deep blue fluorescence materials for organic light-emitting diodes

2021 ◽  
Author(s):  
XinYe Wang ◽  
Yuan Wu ◽  
ChuanMing Wu ◽  
Yixiang Li ◽  
Dongdong Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Blue Emission ◽  
Organic Light Emitting Diodes ◽  
Molecular Scaffolds ◽  
Blue Fluorescence ◽  
Light Emitting ◽  
Highly Efficient ◽  
Deep Blue ◽  
Organic Light

Two novel molecular scaffolds, dibenzo[f,h]furo[2,3-b]quinoxaline (diBFQ) and its derivative, 3,6-bis(4-isopropylphenyls)-11-phenyldibenzo[f,h]furo[2,3-b]quinoxaline (dP-diBFQ), and furo[2',3':5,6]pyrazino[2,3-f][1,10]phenanthroline (FPPhen), were designed and syn-thesized for highly efficient pure and deep blue emission. The unsubstituted molecule scaffold...

Efficient deep-blue non-doped organic light-emitting diode with improved roll-off of efficiency based on hybrid local and charge-transfer excited state

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70085-70090 ◽  
Author(s):  
Haichao Liu ◽  
Qing Bai ◽  
Weijun Li ◽  
Yachen Guo ◽  
Liang Yao ◽  
...  
Keyword(s):  
Excited State ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Blue Emission ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Deep Blue ◽  
Organic Light ◽  
Slow Roll ◽  
Donor Acceptor

Acceptor–donor–acceptor triphenylamine–phenanthroimidazole derivate (TPA–2PPI) servers as an emitter, whose device exhibits deep-blue emission, high efficiency and slow roll-off of efficiency.

scholarly journals Conformationally-restricted bicarbazoles with phenylene bridges displaying deep-blue emission and high triplet energies: systematic structure–property relationships

2018 ◽  
Vol 20 (17) ◽  
pp. 11867-11875 ◽  
Author(s):  
Iain A. Wright ◽  
Hameed A. Al-Attar ◽  
Andrei S. Batsanov ◽  
Andrew P. Monkman ◽  
Martin R. Bryce
Keyword(s):  
Blue Emission ◽  
Structure Property ◽  
Conformationally Restricted ◽  
Deep Blue ◽  
Structure Property Relationships ◽  
Systematic Structure

Twelve bicarbazole derivatives with emission ranging from blue-green to deep-blue, and ET 2.6–3.0 eV.

Efficient non-doped fluorescent OLEDs with nearly 6% external quantum efficiency and deep-blue emission approaching the blue standard enabled by quaterphenyl-based emitters

2018 ◽  
Vol 6 (16) ◽  
pp. 4479-4484 ◽  
Author(s):  
Weixuan Zeng ◽  
Yongbiao Zhao ◽  
Weimin Ning ◽  
Shaolong Gong ◽  
Zece Zhu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Blue Emission ◽  
Device Performance ◽  
Color Purity ◽  
Deep Blue ◽  
Blue Emitters ◽  
Excellent Color

Two quaterphenyl derivatives are rationally designed and synthesized as deep-blue emitters to simultaneously afford outstanding device performance and excellent color purity approaching the NTSC blue standard.

Photophysical Tuning of σ-SiH Copper-Carbazolide Complexes To Give Deep-Blue Emission

2019 ◽  
Vol 59 (1) ◽  
pp. 315-324
Author(s):  
Alexander C. Brannan ◽  
Yunho Lee
Keyword(s):  
Blue Emission ◽  
Deep Blue

Conjugated copolymers bearing 2,7-dithienylphenanthrene-9,10-dialkoxy units: highly soluble and stable deep-blue emissive materials

2020 ◽  
Vol 44 (22) ◽  
pp. 9557-9564
Author(s):  
Noorullah Baig ◽  
Suchetha Shetty ◽  
Sadiara Fall ◽  
Saleh Al-Mousawi ◽  
Thomas Heiser ◽  
...  
Keyword(s):  
High Stability ◽  
Blue Emission ◽  
Quantum Yields ◽  
Deep Blue ◽  
Conjugated Copolymers

Excellent yields, high stability and solubility. Mw = 36.5–152.0 kDa and Đ = 2.5–3.0. Deep-blue emission with quantum yields up to 17%.

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