High Electron Affinity Molecular Dopant CN6-CP for Efficient Organic Light-Emitting Diodes

2019 ◽  
Vol 11 (12) ◽  
pp. 11660-11666 ◽  
Author(s):  
Yuan Liu ◽  
Bernhard Nell ◽  
Katrin Ortstein ◽  
Zhongbin Wu ◽  
Yevhen Karpov ◽  
...  
Keyword(s):  
Electron Affinity ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Electron ◽  
Light Emitting ◽  
Organic Light ◽  
High Electron Affinity

Efficient blue-green molecular organic light emitting diodes based on novel silole derivatives

2002 ◽  
Vol 725 ◽  
Author(s):  
Leonidas C. Palilis ◽  
Hideyuki Murata ◽  
Antti J. Mäkinen ◽  
Manabu Uchida ◽  
Zakya H. Kafafia
Keyword(s):  
Electron Transport ◽  
Quantum Efficiency ◽  
Light Emitting Diodes ◽  
Hole Transport ◽  
Organic Light Emitting Diodes ◽  
Operating Voltage ◽  
High Electron ◽  
Blue Fluorescence ◽  
Light Emitting ◽  
Organic Light

AbstractWe report on highly efficient molecular organic light-emitting diodes (MOLEDs) using two novel silole derivatives as emissive and electron transport materials. A silole derivative, namely 2,5-di-(3-biphenyl)-1,1-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP), which shows blue fluorescence with a high photoluminescence quantum yield of 85% in the solid state, was used as the emissive material. Another silole derivative, namely 2,5-bis-(2‘2“-bipyridin-6-yl)-1,1- dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), that exhibits a non-dispersive high electron mobility of 2x10-4 cm2/Vsec was used as the electron transport material. MOLEDs using these two siloles and a common hole transport material show blue-green emission centered at 495 nm. This red-shifted electroluminescence (EL) band relative to the blue fluorescence of PPSPP is assigned to a PPSPP:NPB exciplex. A low operating voltage of 4.5 V was measured at a luminance of 100 cd/m2 and an EL quantum efficiency of 3.4% was achieved at 100 A/m2. To our knowledge, this is the highest EL quantum efficiency ever reported based on exciplex emission.

scholarly journals Effect of Carrier-Transporting Layer on Blue Phosphorescent Organic Light-Emitting Diodes

Photonics ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 124
Author(s):  
Bo-Yen Lin ◽  
Chia-Hsun Chen ◽  
Tzu-Chan Lin ◽  
Jiun-Haw Lee ◽  
Tien-Lung Chiu
Keyword(s):  
Layer Thickness ◽  
Carrier Mobility ◽  
Light Emitting Diodes ◽  
Hole Mobility ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
High Electron ◽  
Light Emitting ◽  
Organic Light ◽  
Blue Phosphorescent

This study presented the effects of carrier-transporting layer (CTL) on electroluminescence (EL) performance of a blue phosphorescent organic light-emitting diodes (PHOLEDs) with electron transporting host based on three kinds of electron-transporting layers (ETLs) including 3-(4-biphenyl-yl)-4-phenyl-5-(4-tert-butylphenyl)-1,2,4-triazole (TAZ), diphenyl-bis[4-(pyridin-3-yl)phenyl]silane (DPPS) and 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (TmPyPB) and two kinds of hole-transporting layers (HTLs) such as 4,4′-bis[N-1-naphthyl-N-phenyl-amino]biphenyl (NPB), 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC). The carrier recombination and exciton formation zones in blue PHOLEDs strongly depend on the carrier mobility of CTLs and the layer thickness, especially the carrier mobility. Between ETLs and HTLs, the high electron mobility of ETL results in a lower driving voltage in blue PHOLEDs than the high hole mobility of HTL did. In addition, layer thickness modulation is an effective approach to precisely control carriers and restrict carriers within the EML and avoid a leakage emission of CTL. For CTL pairs in OLEDs using the electron transporting host system, ETLs with low mobility and also HTLs with high hole mobility are key points to confine the charge in EML for efficient photon emission. These findings show that appropriate CTL pairs and good layer thickness are essential for efficient OLEDs.

Highly Efficient Green Phosphorescent Organic Light-Emitting Diodes with High Electron Mobility

2011 ◽  
Vol 50 ◽  
pp. 01BC07 ◽  
Author(s):  
Eun Young Choi ◽  
Ji Hyun Seo ◽  
Heo Min Kim ◽  
Kum Hee Lee ◽  
Hyun Ju Kang ◽  
...  
Keyword(s):  
Electron Mobility ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Electron ◽  
High Electron Mobility ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light

Highly Efficient Green Phosphorescent Organic Light-Emitting Diodes with High Electron Mobility

2011 ◽  
Vol 50 (1S2) ◽  
pp. 01BC07 ◽  
Author(s):  
Eun Young Choi ◽  
Ji Hyun Seo ◽  
Heo Min Kim ◽  
Kum Hee Lee ◽  
Hyun Ju Kang ◽  
...  
Keyword(s):  
Electron Mobility ◽  
Light Emitting Diodes ◽  
Organic Light Emitting Diodes ◽  
High Electron ◽  
High Electron Mobility ◽  
Light Emitting ◽  
Highly Efficient ◽  
Organic Light
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