Construction of high efficiency non-doped deep blue emitters based on phenanthroimidazole: remarkable substitution effects on the excited state properties and device performance

2014 ◽  
Vol 16 (38) ◽  
pp. 20772-20779 ◽  
Author(s):  
Zhiming Wang ◽  
Ying Feng ◽  
Shitong Zhang ◽  
Yu Gao ◽  
Zhao Gao ◽  
...  
Keyword(s):  
Excited State ◽  
High Efficiency ◽  
Substitution Effects ◽  
Device Performance ◽  
Deep Blue ◽  
Blue Emitters

Remarkable substitution effects on the excited state properties and device performance are observed by tuning the coupling position.

Highly efficient deep-blue organic light-emitting diodes based on pyreno[4,5-d]imidazole-anthracene structural isomers

2019 ◽  
Vol 7 (33) ◽  
pp. 10273-10280 ◽  
Author(s):  
Hui Liu ◽  
Liangliang Kang ◽  
Jinyu Li ◽  
Futong Liu ◽  
Xin He ◽  
...  
Keyword(s):  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Structural Isomers ◽  
Light Emitting ◽  
Blue Region ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Emitters

By integrating PyI with anthracene, two high-efficiency blue emitters C-BPyIA and N-BPyIA are obtained. Especially, N-BPyIA exhibits decent device performance with an EQEmax of 7.67% in the deep blue region.

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,...

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.

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.

Deep-blue emitters (CIEy ∼0.07) based on phenanthroimidazole: Remarkable substitution effects at the N1 position of imidazole on the excited states and electroluminescence properties

2021 ◽  
Vol 196 ◽  
pp. 109791
Author(s):  
Jaipal Devesing Girase ◽  
Jairam Tagare ◽  
Shahnawaz ◽  
Mangey Ram Nagar ◽  
Iram Siddiqui ◽  
...  
Keyword(s):  
Excited States ◽  
Substitution Effects ◽  
Deep Blue ◽  
Blue Emitters

Starburst 4,4′,4′′-tris(carbazol-9-yl)-triphenylamine-based deep-blue fluorescent emitters with tunable oligophenyl length for solution-processed undoped organic light-emitting diodes

2015 ◽  
Vol 3 (4) ◽  
pp. 861-869 ◽  
Author(s):  
Mingquan Yu ◽  
Shumeng Wang ◽  
Shiyang Shao ◽  
Junqiao Ding ◽  
Lixiang Wang ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Device Performance ◽  
Solution Processed ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light ◽  
Blue Emitters

Starburst TCTA-based deep-blue emitters are developed, whose solution-processed undoped device performance increases gradually with increasing oligophenyl length.

Synergistic effects of hydrogen bonds and the hybridized excited state observed for high-efficiency, deep-blue fluorescent emitters with narrow emission in OLED applications

2019 ◽  
Vol 7 (18) ◽  
pp. 5461-5467 ◽  
Author(s):  
Xu Qiu ◽  
Yuwei Xu ◽  
Cong Wang ◽  
Muddasir Hanif ◽  
Jiadong Zhou ◽  
...  
Keyword(s):  
Excited State ◽  
Hydrogen Bonds ◽  
High Efficiency ◽  
Synergistic Effects ◽  
Highly Efficient ◽  
Deep Blue ◽  
Narrow Emission

A highly efficient deep-blue OLED with narrow emission induced by the synergistic effects of H-bonds and the HLCT excited-state of TPA-PPI-OH was achieved.

Cyanophenyl spiro[acridine-9,9′-fluorene]s as simple structured hybridized local and charge-transfer-based ultra-deep blue emitters for highly efficient non-doped electroluminescent devices (CIEy 〈 0.05)

2021 ◽  
Author(s):  
Taweesak Sudyoadsuk ◽  
Sujinda Petdee ◽  
Chokchai Kaiyasuan ◽  
Chaiyon Chaiwai ◽  
Praweena Wongkaew ◽  
...  
Keyword(s):  
Excited State ◽  
Charge Transfer ◽  
Quantum Efficiency ◽  
Internal Quantum Efficiency ◽  
Electroluminescent Devices ◽  
Highly Efficient ◽  
Deep Blue ◽  
Successful Approach ◽  
Blue Emitters

The hybridized local and charge-transfer (HLCT) excited state is a successful approach to accomplish both high external and internal quantum efficiency. To attain deep blue emissive HLCT emitters, two cyanophenyl...

Asymmetrically twisted anthracene derivatives as highly efficient deep-blue emitters for organic light-emitting diodes

2015 ◽  
Vol 3 (38) ◽  
pp. 9942-9947 ◽  
Author(s):  
Chuanyou He ◽  
Haoqing Guo ◽  
Qiming Peng ◽  
Shengzhi Dong ◽  
Feng Li
Keyword(s):  
Molecular Structure ◽  
Thermal Stability ◽  
High Efficiency ◽  
High Thermal Stability ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light ◽  
Anthracene Derivatives ◽  
Blue Emitters

Two anthracene derivatives with asymmetrically twisted molecular structure achieved high thermal stability and high-efficiency deep-blue emissions.

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
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