Journal ArticleDOI
Organic light-emitting device with an ordered monolayer of silica microspheres as a scattering medium
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Periodic dielectric structures, consisting of hexagonally closed-packed arrays of silica microspheres with diameter of 550 nm, were incorporated into organic light-emitting devices with a conventional two-layer structure made with vacuum-sublimation.Abstract:
Periodic dielectric structures, consisting of hexagonally closed-packed arrays of silica microspheres with the diameter of 550 nm, were incorporated into organic light-emitting devices with a conventional two-layer structure made with vacuum-sublimation The arrays acted as a two-dimensional diffraction lattice which behaved as a light scattering medium for the light propagated in waveguiding modes within the device Strongly scattered light emission through the front surface of the devices was observed An increase in the device coupling-out factor for electroluminescent efficiency by using the scattering structure is demonstratedread more
Citations
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Nearly 100% internal phosphorescence efficiency in an organic light emitting device
TL;DR: In this paper, the authors demonstrate very high efficiency electrophosphorescence in organic light-emitting devices employing a phosphorescent molecule doped into a wide energy gap host, achieving a maximum external quantum efficiency of 19.0±1.0 and luminous power efficiency of 60±5 lm/W.
Journal ArticleDOI
Recent progress of molecular organic electroluminescent materials and devices
L.S Hung,Chin H. Chen +1 more
TL;DR: In this paper, a review is presented on recent progress in organic electroluminescent materials and devices, with emphasis on their material issues pertaining to charge transport, color, and luminance efficiencies.
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High-efficiency organic electrophosphorescent devices with tris(2-phenylpyridine)iridium doped into electron-transporting materials
TL;DR: In this article, the authors demonstrate high-efficiency organic light-emitting devices employing the green electrophosphorescent molecule, fac tris(2-phenylpyridine)iridium [Ir(ppy)3], doped into various electron-transport layer (ETL) hosts.
Journal ArticleDOI
Spectroscopic and Device Aspects of Nanocrystal Quantum Dots
Jeffrey M. Pietryga,Young-Shin Park,Young-Shin Park,Jaehoon Lim,Andrew F. Fidler,Wan Ki Bae,Sergio Brovelli,Victor I. Klimov +7 more
TL;DR: Recent advances in nanocrystal research related to applications of QD materials in lasing, light-emitting diodes (LEDs), and solar energy conversion are examined.
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Improved light out-coupling in organic light emitting diodes employing ordered microlens arrays
S. Möller,S. R. Forrest +1 more
TL;DR: In this article, ordered microlens arrays with 10 μm diam poly-dimethyl-siloxane lenses attached to glass substrates increase the light output of organic light emitting devices (OLED) by a factor of 1.5 over unlensed substrates.
References
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Journal ArticleDOI
Angular Dependence of the Emission from a Conjugated Polymer Light‐Emitting Diode: Implications for efficiency calculations
Journal ArticleDOI
Light extraction from optically pumped light-emitting diode by thin-slab photonic crystals
TL;DR: In this paper, a promising thin-slab light-emitting diode (LED) design was described, which uses a highly efficient coherent external scattering of trapped light by a two-dimensional (2D) photonic crystal.
Journal ArticleDOI
High-external-quantum-efficiency organic light-emitting devices
TL;DR: The high device efficiencies of vacuum-deposited organic light-emitting devices based on tris-(8-hydroxyquinoline) aluminum are promising for developing OLED-based displays with extremely low power consumption and increased operational lifetime.
Journal ArticleDOI
Extended molecular design concept of molecular materials for electroluminescence: sublimed–dye films, molecularly doped polymers and polymers with chromophores
TL;DR: It is demonstrated that the molecular design concept of dye films is applicable for the cases of polymer–dispersed dye systems and the importance of the adoption of multilayer structures for obtaining high EL efficiency is discussed.
Journal ArticleDOI
Fabrication and Optical Properties of Two-Dimensional Ordered Arrays of Silica Microspheres
Takashi Yamasaki,Tetsuo Tsutsui +1 more
TL;DR: In this paper, two-dimensional ordered arrays of SiO2 microspheres, as a semi-two-dimensional photonic crystal, with large surface area were fabricated by using a newly developed self-organization method.
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