Results 51 to 60 of about 1,353,383 (365)
High Extraction Efficiency Light-emitting Diodes Based on Embedded Air-gap Photonic-crystals [PDF]
, 2013 This letter reports on high extraction efficiency light-emitting diodes (LEDs) based on embedded two-dimensional air-gap photonic crystals (PhCs). High refractive index contrast provided by the air gaps along with high interaction of the embedded PhCs ...
Fleury, Blaise +7 more
core +1 more source
IEEE Photonics Journal, 2020 We conducted a systematic investigation of the light extraction efficiency (LEE) of GaN-based vertical micro-scale light-emitting diode (μ-LED) structures using three-dimensional finite-difference time-domain (FDTD) simulations. The LEE of μ
Han-Youl Ryu +2 more
doaj +1 more source
Anisotropic materials in OLEDs for high outcoupling efficiency [PDF]
, 2015 We present the results of an optical study in which we evaluate the effect of anisotropic electron transport layers (ETL) and anisotropic hole transport layers (HTL) on the outcoupling efficiency of bottom emitting organic light emitting diodes (OLEDs ...
Callens, Michiel +2 more
core +1 more source
Vertically mounted InGaN-on-Sapphire light-emitting diodes [PDF]
, 2011 An InGaN/GaN light-emitting diode (LED) chip mounted in a vertical configuration (vmLED) is demonstrated, exhibiting significant enhancement to light extraction, compared with a LED mounted in a conventional planar geometry.
Choi, HW, Lai, PT, Ma, ZT, Zhu, L
core +1 more source
The Blandford-Znajek mechanism and emission from isolated accreting black holes [PDF]
, 1999 In the presence of a magnetic field, rotational energy can be extracted from black holes via the Blandford-Znajek mechanism. We use self-similar advection dominated accretion (ADAF) models to estimate the efficiency of this mechanism for black holes ...
Blandford R. D. +13 more
core +2 more sources
Surface plasmon enhanced light-emitting diode [PDF]
, 2000 A method for enhancing the emission properties of light-emitting diodes, by coupling to surface plasmons, is analyzed both theoretically and experimentally.
Lončar, Marko +2 more
core +1 more source
Efficiency enhancement of InGaN amber MQWs using nanopillar structures [PDF]
, 2017 We have investigated the use of nanopillar structures on high indium content InGaN amber multiple quantum well (MQW) samples to enhance the emission efficiency. A significant emission enhancement was observed which can be attributed to the enhancement of
Boisen, Anja +7 more
core +1 more source
Optics Express, 2020 This work reports on high extraction efficiency in subwavelength GaAs/AlGaAs semiconductor nanopillars. We achieve up to 37-fold enhancement of the photoluminescence (PL) intensity from sub-micrometer (sub-µm) pillars without requiring back reflectors, high-Q dielectric cavities, nor large 2D arrays or plasmonic effects.
Romeira, Bruno +4 more
openaire +2 more sources
Measurement of Extraction and Absorption Parameters in GaN-based Photonic-crystal Light-emitting Diodes [PDF]
, 2013 The light extraction efficiency of photonic-crystal (PhC) light-emitting diodes (LEDs) relies on the competition between the PhC extraction and dissipation mechanisms of the guided light within the LED.
Fleury, Blaise +5 more
core +1 more source
Analysis of light extraction efficiency of GaN-based light-emitting diodes
Journal of Physics: Conference Series, 2011 GaN-based light emitting diodes (LEDs) as one of the most important light source in next-generation solid-state lighting have been extensively studied and remarkable progress has been obtained. However, the light extraction efficiency (LEE) is not sufficient to satisfy application requirements.
Pei Wang, Bin Cao, Zhiyin Gan, Sheng Liu
openaire +1 more source