quantum well light emitting diodes
Influence of Quantum Dot Layer on the Properties of Quantum Dot Light Emitting Diodes
... dot light emitting diodes (QLEDs) are superior to organic light emitting diodes (OLEDs) because of their unique potential properties, including narrow luminescence spectrum, wide ...
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Influence of Quantum Well Width on the Electroluminescence Properties of AlGaN Deep Ultraviolet Light Emitting Diodes at Different Temperatures
... the light extraction, such as photonic crystals and nano- structures and surface plasmon ...external quantum efficiency. It is well known that group III ni- trides have wurtzite structures, in which ...
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Enhanced Performance of Quantum Dot Based Light Emitting Diodes with Gold Nanoparticle Doped Hole Injection Layer
... matches well with the work function of the ITO/Au NP-doped PEDOT:PSS anode and contributes to the hole accumulation in the region of QDs layer, was used as HTL ...as well as hole blocking due to the high ...
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The influence of type I and type II triplet multiple quantum well structure on white organic light emitting diodes
... inorganic light-emitting diodes (LEDs), which have developed for several decades and are still being researched [1-3], organic light-emitting diodes (OLEDs) now have also ...
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Highly efficient blue organic light emitting diodes using quantum well like multiple emissive layer structure
... material of BAlq shows the lowest current density. Con- sequently, we realized that a p-type semiconductor has more electron affinity than a n-type semiconductor [24]. Figure 2b shows the current density-voltage ...
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Effect of triplet multiple quantum well structures on the performance of blue phosphorescent organic light emitting diodes
... shows the best luminous and external quantum effi- ciency values of 19.95 cd/A and 10.05%, respectively. A comparison of the performance of these four devices is provided in Table 1. Device C exhibited higher ...
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The effect of free standing GaN substrate on carrier localization in ultraviolet InGaN light emitting diodes
... ultraviolet light-emitting diodes (UV-LEDs) based on InGaN/AlInGaN multiple quantum well (MQW) structures on free-standing GaN (FS-GaN) substrate by atmospheric pressure metal-organic ...
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Nearly Efficiency Droop Free AlGaN Based Ultraviolet Light Emitting Diodes with a Specifically Designed Superlattice p Type Electron Blocking Layer for High Mg Doping Efficiency
... the quantum barriers ...the quantum barrier so the polarization induced electric field in the spike layers can well reduce the drift velocity of the ...the quantum barrier and the ...
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AlGaInP light emitting diodes with SACNTs as current spreading layer
... Transparent conductive current-spreading layer is important for quantum efficiency and thermal performance of light-emitting diodes (LEDs). The increasing demand for tin-doped indium oxide ...
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Recent advances in light outcoupling from white organic light emitting diodes
... OLEDs, light was emitted by relatively simple fluorescent compounds that were often derived from commonly used laser ...fluorescence quantum yields, it soon became clear that during electrical operation, ...
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Substrate Free InGaN/GaN Nanowire Light Emitting Diodes
... Nitride light-emitting diodes (LEDs) have found numer- ous applications in our everyday life (general lighting, automotive headlamps, traffic signals, indicator lamps for electronic devices, ...the ...
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Fabrication and characterization of organic light emitting diodes for display applications
... organic light emitting diodes involves charge injection from electrodes, transport of charge carriers, recombination of holes and electrons to generate electronically excited states called excitons, ...
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Finite-Difference Time-Domain Simulations on Overgrown InGaN/GaN Multiple Quantum Well (MQW) Light Emitting Diode (LED).
... Light emitting diodes are emerging as compact, rugged, bright and efficient light sources making them a compelling substitute for general lighting ...blue light emitting diode ...
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Investigation of Nanoscale Photonic Crystal Arrays on Gallium Nitride Blue Light emitting Diodes
... based light- emitting diodes (LED) have been gradually adopted as solid lighting sources ...of quantum photons is limited by the high refractive index of GaN material, which results from its ...
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Determination of Planck’s Constant using Light Emitting Diodes
... a quantum of energy absorbed to that emitted during electron transitions which can be extended to emission by light-emitting ...a light emitting diode. When a ...
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Influence of indium-tin-oxide and emitting-layer thicknesses on light outcoupling of perovskite light-emitting diodes
... perovskite light-emitting diodes (PeLEDs) are emerging as a promising option for next-generation flexible displays and lighting applications due to their outstanding optoelectrical characteristics, ...
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GaAs-Based Superluminescent Light-Emitting Diodes with 290-nm Emission Bandwidth by Using Hybrid Quantum Well/Quantum Dot Structures
... of emitting an emission bandwidth of 290 nm centered at 1200 nm with a corresponding output power of ...as well as introducing the high-order QW transi- tions due to the QD strain-induced piezoelectric ...
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Optical and polarization properties of nonpolar InGaN-based light-emitting diodes grown on micro-rod templates
... with an output power of 1.3 mW at 20 mA. Furthermore, the external quantum eiciency (EQE) has been calcu- lated as a function of current as well, as shown in Fig. 4(c). In order to compare the eiciency ...
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InGaN/GaN Multiple Quantum Well Light-Emitting Diodes Grown on Polar, Semi-polar and Non-Polar Orientations.
... relative light-output power from the NW LED was found to be about 3 times higher than the conventional c-plane LED at identical injected currents and this was attributed to a combination of factors; primarily, ...
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WATER DISINFECTION USING ULTRAVIOLET-A AND VISIBLE LIGHT-EMITTING DIODES
... visible light when an electric current passes through it. LEDs can emit light within a very narrow wavelength spectrum and can be considered as a monochromatic ...visible light sources which are not ...
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