High-efficiency near-infrared fluorescent organic light-emitting diodes with small efficiency roll-off based on AIE-active phenanthro[9,10-d]imidazole derivatives

2020 ◽  
Vol 8 (20) ◽  
pp. 6883-6890 ◽  
Author(s):  
Futong Liu ◽  
Yongbo Tan ◽  
Hui Liu ◽  
Xiangyang Tang ◽  
Lei Gao ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
High Efficiency ◽  
Organic Light Emitting Diodes ◽  
Strong Fluorescence ◽  
Light Emitting ◽  
Photoluminescence Quantum Yield ◽  
Organic Light

PIBz-3-PTZ exhibits strong fluorescence with a photoluminescence quantum yield of 35% in films. The nondoped device achieves a maximum external quantum efficiency of 2.02% peaking at 672 nm with small efficiency roll-off.

Near-infrared organic light-emitting diodes with very high external quantum efficiency and radiance

2016 ◽  
Vol 11 (1) ◽  
pp. 63-68 ◽  
Author(s):  
Kiet Tuong Ly ◽  
Ren-Wu Chen-Cheng ◽  
Hao-Wu Lin ◽  
Yu-Jeng Shiau ◽  
Shih-Hung Liu ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light ◽  
Very High

Non-halogenated solvent-processed highly efficient green Ir(iii) complexes with an external quantum efficiency exceeding 23% for phosphorescent organic light-emitting diodes

2020 ◽  
Vol 8 (37) ◽  
pp. 12959-12967
Author(s):  
Raja Kumaresan ◽  
Athithan Maheshwaran ◽  
Ho-Yeol Park ◽  
Kyungmin Sung ◽  
Jungmin Choi ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

High efficiency green phosphorescent Ir(III) complexes with solubilizing groups introduced to enable non-halogenated solvent-based fabrication of PHOLEDs with high EQE and CE values.

scholarly journals A simple and efficient approach toward deep-red to near-infrared-emitting iridium(iii) complexes for organic light-emitting diodes with external quantum efficiencies of over 10%

2020 ◽  
Vol 11 (9) ◽  
pp. 2342-2349 ◽  
Author(s):  
Zhao Chen ◽  
Hongyang Zhang ◽  
Dawei Wen ◽  
Wenhai Wu ◽  
Qingguang Zeng ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
New Record ◽  
Near Infrared ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Efficient Approach ◽  
Organic Light

The simplest and the most efficient deep-red to near-infrared-emitting emitters afford a new record external quantum efficiency for iridium(iii) complex based deep-red to near-infrared organic light-emitting diodes.

Molecular Design Opening Two Emission Pathways for High Efficiency and Long Lifetime in Thermally Activated Delayed Fluorescent Organic Light-Emitting Diodes

2021 ◽  
Author(s):  
Ha Lim Lee ◽  
Kyung Hyung Lee ◽  
Jun Yeob Lee ◽  
Ho Jung Lee
Keyword(s):  
Quantum Yield ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Molecular Design ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Thermally Activated ◽  
Photoluminescence Quantum Yield ◽  
Organic Light ◽  
Long Lifetime

High efficiency and long lifetime thermally activated delayed fluorescent (TADF) organic light-emitting diodes (OLEDs) were developed using a novel molecular design with two emission pathways for high photoluminescence quantum yield...

scholarly journals Green phosphorescent organic light-emitting diode exhibiting highest external quantum efficiency with ultra-thin undoped emission layer

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shin Woo Kang ◽  
Dong-Hyun Baek ◽  
Byeong-Kwon Ju ◽  
Young Wook Park
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting Diode ◽  
Organic Light Emitting Diodes ◽  
Emission Layer ◽  
Systematic Analysis ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

AbstractIn this study, we report highly efficient green phosphorescent organic light-emitting diodes (OLEDs) with ultra-thin emission layers (EMLs). We use tris[2-phenylpyridinato-C2,N]iridium(III) (Ir(ppy)3), a green phosphorescent dopant, for creating the OLEDs. Under systematic analysis, the peak external quantum efficiency (EQE) of an optimized device based on the ultra-thin EML structure is found to be approximately 24%. This result is highest EQE among ultra-thin EML OLEDs and comparable to the highest efficiency achieved by OLEDs using Ir(ppy)3 that are fabricated via conventional doping methods. Moreover, this result shows that OLEDs with ultra-thin EML structures can achieve ultra-high efficiency.

High-efficiency organic light-emitting diodes of phosphorescent PtAg2heterotrinuclear acetylide complexes supported by triphosphine

2017 ◽  
Vol 5 (12) ◽  
pp. 3072-3078 ◽  
Author(s):  
Yi-Peng Li ◽  
Xin-Xia Fan ◽  
Yue Wu ◽  
Xian-Chong Zeng ◽  
Jin-Yun Wang ◽  
...  
Keyword(s):  
Current Efficiency ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Heterometallic Cluster ◽  
Organic Light ◽  
New Type ◽  
Heterometallic Cluster Complexes

Platinum(ii)–silver(i) heterometallic cluster complexes are used as a new type of phosphorescent dopant to achieve high-efficiency OLEDs with 67.4 cd A−1peak current efficiency (CE) and 17.4% external quantum efficiency (EQE).

The structure optimization of phenanthroimidazole based isomers with external quantum efficiency approaching 7% in non-doped deep-blue OLEDs

2020 ◽  
Vol 8 (9) ◽  
pp. 2975-2984 ◽  
Author(s):  
Jie-Ji Zhu ◽  
Yuwen Chen ◽  
Yong-Hong Xiao ◽  
Xin Lian ◽  
Guo-Xi Yang ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Structure Optimization ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light

In this work, four phenanthroimidazole (PI) based isomers TPA-PPI-PBI, TPA-PPI-NPBI, PBI-PPI-TPA and NPBI-PPI-TPA for high-efficiency deep-blue organic light-emitting diodes (OLEDs) have been designed and synthesized.

Reduced efficiency roll-off in all-phosphorescent white organic light-emitting diodes with an external quantum efficiency of over 20%

2015 ◽  
Vol 3 (14) ◽  
pp. 3304-3310 ◽  
Author(s):  
Liping Zhu ◽  
Zhongbin Wu ◽  
Jiangshan Chen ◽  
Dongge Ma
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Rational Design ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
Light Emitting ◽  
Organic Light

A rational design of the emission layers to achieve a high efficiency WOLED with reduced roll-off.

scholarly journals Phenanthroimidazole-Based Bipolar Carbazoles Featuring Cyano Substituents to Realize Efficient Deep Blue Electroluminescence with External Quantum Efficiency Near 6%

2021 ◽  
Author(s):  
Anuj Sharma ◽  
K. R. Justin Thomas ◽  
Mangey Ram Nagar ◽  
Jwo-Huei Jou
Keyword(s):  
Excited State ◽  
Quantum Yield ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Organic Light Emitting Diodes ◽  
High Quantum Yield ◽  
Crucial Issue ◽  
Light Emitting ◽  
Deep Blue ◽  
Organic Light

Developing deep-blue bipolar materials with high quantum yield remains a crucial issue in organic-light emitting diodes. Excited state characteristics of the dyes play a pivotal role in controlling the photoluminescence...

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