Synthesis and optical properties of phenanthromidazole derivatives for organic electroluminescent devices

2015 ◽  
Vol 39 (1) ◽  
pp. 142-154 ◽  
Author(s):  
Jayaraman Jayabharathi ◽  
Periyasamy Ramanathan ◽  
Venugopal Thanikachalam
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Electroluminescent Devices ◽  
Organic Electroluminescent ◽  
Triplet Triplet Annihilation

The external quantum efficiency roll-off may be due to triplet–triplet annihilation (TTA) and triplet–polaron annihilation (TPA).

Green phosphorescent organic electroluminescent devices with 27.9% external quantum efficiency by employing a terbium complex as a co-dopant

2019 ◽  
Vol 7 (26) ◽  
pp. 7953-7958 ◽  
Author(s):  
Rongzhen Cui ◽  
Weiqiang Liu ◽  
Liang Zhou ◽  
Xuesen Zhao ◽  
Yunlong Jiang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Rare Earth Complexes ◽  
Operating Voltage ◽  
Terbium Complex ◽  
Electroluminescent Devices ◽  
Organic Electroluminescent ◽  
Trivalent Rare Earth ◽  
Bright Green

Bright green organic electroluminescent devices with a low operating voltage and high efficiencies were realized by utilizing trivalent rare earth complexes as co-dopants.

IRIDIUM COMPLEXES WITH 3-METHYL-2,4-PENTANEDIONE LIGAND FOR ORGANIC ELECTROLUMINESCENT DEVICE

2005 ◽  
Vol 14 (04) ◽  
pp. 529-534 ◽  
Author(s):  
DONG UK KIM ◽  
SEOUNG-HEY PAIK ◽  
SUNG-HOON KIM ◽  
YOON-HEUNG TAK ◽  
SANG-DAE KIM ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Iridium Complexes ◽  
Electroluminescent Device ◽  
Organic Electroluminescent ◽  
Current Densities

Phosphorescent materials, IR-FPPA1, IR-PPA1 and IR-TPA1 as emission dopants for electroluminescent (EL) devices were synthesized. Three types of devices such as ITO/ NPD/IR-FPPA1 (6%), IR-PPA1 (6%) and IR-TPA1 (6%) in CBP/BCP/Alq/LiF/Al were fabricated. IR-FPPA1, IR-PPA1 and IR-TPA1 exhibited 540 Cd/m2, 6600 Cd/m2 and 590 Cd/m2 with their external quantum efficiency of 1.2%, 8.9% and 3.0% in current densities of 20 mA/cm2, respectively. EL spectra of the IR-FPPA1, IR-PPA1, and IR-TPA1 devices had the band maxima at 490 nm, 535 nm and 615 nm, respectively.

Simple Measurement of Quantum Efficiency in Organic Electroluminescent Devices

2001 ◽  
Vol 40 (Part 2, No. 7B) ◽  
pp. L783-L784 ◽  
Author(s):  
Shinji Okamoto ◽  
Katsu Tanaka ◽  
Yoshitaka Izumi ◽  
Hironori Adachi ◽  
Takayuki Yamaji ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Electroluminescent Devices ◽  
Organic Electroluminescent ◽  
Simple Measurement

High performance red organic electroluminescent devices based on a trivalent iridium complex with stepwise energy levels

RSC Advances ◽  
2016 ◽  
Vol 6 (75) ◽  
pp. 71282-71286 ◽  
Author(s):  
Yanan Li ◽  
Liang Zhou ◽  
Rongzhen Cui ◽  
Yunlong Jiang ◽  
Xuesen Zhao ◽  
...  
Keyword(s):  
Current Efficiency ◽  
External Quantum Efficiency ◽  
Power Efficiency ◽  
High Performance ◽  
Energy Levels ◽  
Iridium Complex ◽  
High Brightness ◽  
Electroluminescent Devices ◽  
Maximum Current ◽  
Organic Electroluminescent

Red EL device with maximum current efficiency of 44.76 cd A−1, power efficiency of 40.19 lm W−1, and external quantum efficiency (EQE) of 15.5% was realized. At high brightness of 1000 cd m−2, current efficiency as high as 40.59 cd A−1 (EQE = 14.4%) can be retained.

A dibenzo[a,c]phenazine-11,12-dicarbonitrile (DBPzDCN) acceptor based thermally activated delayed fluorescent compound for efficient near-infrared electroluminescent devices

2018 ◽  
Vol 6 (25) ◽  
pp. 6698-6704 ◽  
Author(s):  
Shipan Wang ◽  
Yang Miao ◽  
Xianju Yan ◽  
Kaiqi Ye ◽  
Yue Wang
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Fluorescent Compound ◽  
Electroluminescent Devices ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Activated ◽  
Organic Light

A high external quantum efficiency of 7.68% was achieved in a near-infrared organic light-emitting diode with a novel TADF molecule.

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