Nondoped deep-blue fluorescent organic electroluminescent device with CIEy = 0.06 and low efficiency roll-off based on carbazole/oxadiazole derivatives

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 (CIEx,y = 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-1, 60.7 lm W-1 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

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Effective Energy Transfer for Green, Orange, and Red PHOLEDs Based on Bipolar Deep‐blue Emitter with Low Efficiency Roll‐off at High Brightness

Advanced Photonics Research ◽

10.1002/adpr.202100031 ◽

2021 ◽

pp. 2100031

Author(s):

Guo-Xi Yang ◽

Jie-Ji Zhu ◽

Shan-Shun Tang ◽

Hong-Ji Tan ◽

Xin He ◽

...

Keyword(s):

Energy Transfer ◽

Effective Energy ◽

High Brightness ◽

Deep Blue ◽

Effective Energy Transfer ◽

Low Efficiency

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Investigation of Electronic Transport in Organic Electroluminescent Device Composed by Alq3 Molecules

Journal of Computational and Theoretical Nanoscience ◽

10.1166/jctn.2014.3476 ◽

2014 ◽

Vol 11 (4) ◽

pp. 1164-1168 ◽

Cited By ~ 1

Author(s):

Alessandre Sampaio-Silva ◽

Vicente Ferrer Pureza Aleixo ◽

Samuel Maciel Correa ◽

Jordan Del Nero

Keyword(s):

Electronic Transport ◽

Electroluminescent Device ◽

Organic Electroluminescent

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Thermal properties of conduction current and carrier behavior in an organic electroluminescent device

Electronics and Communications in Japan ◽

10.1002/ecj.10048 ◽

2009 ◽

Vol 92 (3) ◽

pp. 24-31 ◽

Cited By ~ 2

Author(s):

Masahiro Minagawa ◽

Kazunari Shinbo ◽

Keizo Kato ◽

Futao Kaneko

Keyword(s):

Thermal Properties ◽

Conduction Current ◽

Electroluminescent Device ◽

Organic Electroluminescent

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

Journal of Nonlinear Optical Physics & Materials ◽

10.1142/s0218863505002980 ◽

2005 ◽

Vol 14 (04) ◽

pp. 529-534 ◽

Cited By ~ 3

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.

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