Optical constants of platinum octaethyl porphyrin in single-layer organic light emitting diode studied by spectroscopic ellipsometry

2006 ◽  
Vol 496 (2) ◽  
pp. 674-678 ◽  
Author(s):  
Taiju Tsuboi ◽  
Yoko Wasai ◽  
Nataliya Nabatova-Gabain
Keyword(s):  
Spectroscopic Ellipsometry ◽  
Optical Constants ◽  
Light Emitting Diode ◽  
Single Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

Hybrid film of single-layer graphene and carbon nanotube as transparent conductive electrode for organic light emitting diode

2019 ◽  
Vol 257 ◽  
pp. 116186 ◽  
Author(s):  
Pradeep Kumar ◽  
Kai Lin Woon ◽  
Wah Seng Wong ◽  
Mohamed Shuaib Mohamed Saheed ◽  
Zainal Arif Burhanudin
Keyword(s):  
Carbon Nanotube ◽  
Hybrid Film ◽  
Light Emitting Diode ◽  
Single Layer ◽  
Single Layer Graphene ◽  
Transparent Conductive Electrode ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Layer Graphene ◽  
Organic Light

Modeling the influence of charge traps on single-layer organic light-emitting diode efficiency

2006 ◽  
Vol 99 (6) ◽  
pp. 064509 ◽  
Author(s):  
S. J. Konezny ◽  
D. L. Smith ◽  
M. E. Galvin ◽  
L. J. Rothberg
Keyword(s):  
Light Emitting Diode ◽  
Single Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

Modeling and Analysis of Organic Light Emitting Diode with Thin Film Anti-Reflective Coatings

2020 ◽  
Vol 15 (4) ◽  
pp. 425-431
Author(s):  
B. M. Chaya ◽  
Prasant Kumar Pattnaik ◽  
K. Narayan
Keyword(s):  
Power Efficiency ◽  
Light Emitting Diode ◽  
Fdtd Method ◽  
Light Output ◽  
Single Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Reflective Coating ◽  
Organic Light ◽  
Reflective Coatings

The effects of anti-reflective coatings (ARC) on organic light emitting diode (OLED) optical characteristics are reported in this paper. The light output produced from the OLED is not 100%. But the emitted light is trapped due to various Modes. The losses at the glass air substrate interfaces of an OLED are addressed in this work. The Anti-Reflective coatings increase the light output by reducing OLED reflections at the interface between glass and air. The Finite Difference Time Domain (FDTD) method and the Fresnel theory have been used to design the device and study the effects on OLED of the Single Layer Anti-Reflective Coating (SLAR) and Double Layer Anti-Reflective Coating (DLAR). The thicknesses and refractive indices of the layers of the anti-reflective coatings were optimized. We also compared the light out coupling power efficiency of the SLAR coated OLED with that of an OLED with a DLAR coating and also with Conventional OLED. The results show that the enhancement in light output efficiency of the DLAR coated OLED was slightly higher than that of the SLAR coated OLED.

Single-layer organic light-emitting diode with 2.0% external quantum efficiency prepared by spin-coating

2000 ◽  
Vol 320 (5-6) ◽  
pp. 387-392 ◽  
Author(s):  
Y.D. Jin ◽  
J.P. Yang ◽  
P.L. Heremans ◽  
M. Van der Auweraer ◽  
E. Rousseau ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Spin Coating ◽  
External Quantum Efficiency ◽  
Light Emitting Diode ◽  
Single Layer ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

Covalent Functionalized Conjugated Dendrimers for Organic Light Emitting Diodes: Synthesis, Characterization, and the Deep Blue Electroluminescence

2011 ◽  
Vol 64 (2) ◽  
pp. 160 ◽  
Author(s):  
Yan Zhou ◽  
Lin Ding ◽  
Li-Ming Xiang ◽  
Jian Pei
Keyword(s):  
Light Emitting Diode ◽  
Photophysical Properties ◽  
Single Layer ◽  
Blue Colour ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Deep Blue ◽  
Organic Light ◽  
Hole Transporting ◽  
Cie Chromaticity

Two deep blue-emitting dendrimers 11 and 12 with carbazole containing dendrons were developed in this contribution. The carbazole-containing units were introduced to tune the charge-transporting property of the desired dendrimers. The investigation of photophysical properties, electrochemical, and electroluminescence properties demonstrated that the balance between electron and hole transporting was achieved from both dendrimers. The preliminary organic light-emitting diode (OLED) fabrication achieved a pure blue colour with stable CIE chromaticity coordinates (X: 0.15–0.16, Y: 0.09–0.10) for 11 and 12. Single layer deep blue emitting diode devices with higher efficiency are achieved without the colour changing. The investigation of OLED performance indicates that dendrimers 11 and 12 are promising light-emitting materials with pure blue colour and good colour stability for OLEDs.

scholarly journals Perylene Based Solution Processed Single Layer WOLED with Adjustable CCT and CRI

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 725
Author(s):  
Volkan Bozkus ◽  
Erkan Aksoy ◽  
Canan Varlikli
Keyword(s):  
Light Emitting Diode ◽  
Single Layer ◽  
Visible Range ◽  
Host Matrix ◽  
Solution Processed ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light ◽  
Exciplex Emission ◽  
Color Rendering

In solution processed single layer white organic light emitting diode (WOLED) applications, the choice of host matrix and optimization of dopant levels represent two crucial parameters to consider. In this work, poly(N-vinylcarbazole) (PVK): 2-(4-Biphenylyl)-5-phenyl-1,3,4-oxadiazole (PBD) and PVK:1,3-bis[(4-tert-butylphenyl)-1,3,4-oxadiazolyl] phenylene (OXD-7) matrices are used as hosts for perylene based devices. PVK:PBD presented better compatibility and lower turn-on voltages compared to PVK:OXD-7. Benefiting from the exciplex emission observed at 630 nm, a color rendering index (CRI) value of 90 is reached with the device containing PVK:PBD as the host and 0.1 wt.% of an orange emitting perylene derivative, i.e., PDI. Introduction of the perylene based green emitter, i.e., PTE, in this emitting layer not only caused a fading in the exciplex emission, but also resulted in disappearance of the electroplex peak at 535 nm, which is detected between PVK:PBD and PTE in bare PTE containing devices. Full visible range coverage is achieved by optimizing the PDI:PTE ratio. WOLED containing PVK:PBD:0.06 wt.% PDI:0.03 wt.% PTE presented high CRI (≥95) and adjustable correlated color temperatures (CCT, 3800 K-5100 K).

White light emission from a single layer organic light emitting diode fabricated by spincoating

2000 ◽  
Vol 325 (1-3) ◽  
pp. 251-256 ◽  
Author(s):  
J.P Yang ◽  
Y.D Jin ◽  
P.L Heremans ◽  
R Hoefnagels ◽  
P Dieltiens ◽  
...  
Keyword(s):  
White Light ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Single Layer ◽  
White Light Emission ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Organic Light

scholarly journals Virtual Screening of TADF Emitters for Single-Layer OLEDs

2021 ◽  
Vol 9 ◽  
Author(s):  
Kun-Han Lin ◽  
Gert-Jan A. H. Wetzelaer ◽  
Paul W. M. Blom ◽  
Denis Andrienko
Keyword(s):  
Light Emitting Diode ◽  
Single Layer ◽  
Delayed Fluorescence ◽  
Hole Transport ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Organic Light Emitting Diode ◽  
Thermally Activated ◽  
Organic Light ◽  
Donor And Acceptor

Thermally-activated delayed fluorescence (TADF) is a concept which helps to harvest triplet excitations, boosting the efficiency of an organic light-emitting diode. TADF can be observed in molecules with spatially separated donor and acceptor groups with a reduced triplet-singlet energy level splitting. TADF materials with balanced electron and hole transport are attractive for realizing efficient single-layer organic light emitting diodes, greatly simplifying their manufacturing and improving their stability. Our goal here is to computationally screen such materials and provide a comprehensive database of compounds with a range of emission wavelengths, ionization energies, and electron affinities.

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