InGaN light-emitting diodes
Effect of the barrier growth mode on the luminescence and conductivity micron scale uniformity of InGaN light emitting diodes
... In this paper, we present a combined cathodoluminescence (CL) and electron beam induced current (EBIC) study of the optical and electrical properties of InGaN light emitting diodes grown using ...
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The effect of free standing GaN substrate on carrier localization in ultraviolet InGaN light emitting diodes
... (EBLs) grown at 1,030°C, and a 100-nm-thick p-GaN layer grown at 1,030°C. In addition, the growth of UV- LEDs based on the InGaN/AlInGaN MQW epitaxial structure on undoped GaN/sapphire template was also conducted ...
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Enhancement of InGaN Based Light Emitting Diodes Performance Grown on Cone Shaped Pattern Sapphire Substrates
... For the standard LED process, ICP dry etching technique was used to etch through the p-GaN layer and MQW active region, until the n-GaN layer was exposed. Indium tin oxide (ITO) was deposited onto the p-GaN layer by ...
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Fabrication of InGaN/GaN MQWs Vertical Blue Light-Emitting Diodes Using Laser Lift-Off Technique
... GaN-based light-emitting diodes (LEDs) are the most promising candidate for development of more efficient and highly reliable light source for replacement of low efficient (~ 5-10%) ...
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Beam divergence measurements of InGaN/GaN micro-array light-emitting diodes using confocal microscopy
... Several groups have reported recently on the development of high-density, two- dimensional arrays of micrometer-sized InGaN/GaN light-emitting diodes. 1-3 The latest advances 3 have provided ...
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Substrate Free InGaN/GaN Nanowire Light Emitting Diodes
... The LED starts to luminesce at a forward bias of ~5 V with a working current in the order of 1 mA. This rela- tively high light-up voltage is attributed to the non-ohmic nature of the ITO contact to the moderately ...
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Aging characteristics of blue InGaN micro-light emitting diodes at an extremely high current density of 3.5kAcm−2
... blue InGaN micro-LED device was fabricated using a commercial wafer on c-plane sapphire substrates from SuperNova ...of InGaN/GaN multiple quantum wells (MQWs), an AlGaN layer, and a p-GaN ...
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Strong photonic crystal behavior in regular arrays of core-shell and quantum disc InGaN/GaN nanorod light-emitting diodes
... A 405nm diode laser was used to resonantly excite just the InGaN QW layers without significant absorption in the GaN layers. The core-shell nanorods were found to emit broadband photoluminescence (PL) at visible ...
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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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Light-Emitting Diodes in the Solid-State Lighting Systems
... the light output was not enough to illuminate an area ...the light output rose, while maintaining efficiency at acceptable levels ...replacement-size light bulb form, so that the LED lamps can be ...
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Light emitting diodes enhanced by localized surface plasmon resonance
... incandescent light sources have propelled the com- mercialization of solid-state lighting devices containing semiconductors as the light emitters ...white light LEDs are illustrated in Figure ...
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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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InGaN/GaN Multiple Quantum Well Light-Emitting Diodes Grown on Polar, Semi-polar and Non-Polar Orientations.
... The InGaN quantum wells in the active region of the LED structure will experience large internal electric fields predominantly arising from the piezoelectric ...the InGaN quantum wells as they conform ...
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Mechanism of enhanced light output in InGaN-based microlight emitting diodes
... The LED structure was grown on the c-face of a sap- phire substrate by metal organic chemical vapor deposition, and consisted of a GaN buffer layer, a 3 m n-type GaN layer, and a three-period InGaN/GaN MQW ...
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Temperature-dependent efficiency droop of blue InGaN micro-light emitting diodes
... Temperature-dependent trends in radiative and Auger recombination coefficients have been determined at different injection carrier concentrations using InGaN micro-light emitting diodes 40 lm ...
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Influence of patterned sapphire substrates with different symmetry on the light output power of InGaN based LEDs
... the light output power (LOP) of InGaN-based light-emitting diodes (LEDs) grown on patterned sapphire substrates (PSSs) with different ...the InGaN-based LED with the HLAPSS has a ...
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Growth and Fabrication of GaN/InGaN Violet Light Emitting Diode on Patterned Sapphire Substrate
... violet light emitting diodes (LEDs), emitting at 430 nm, have been grown on conventional single side polished (SSP) and patterned sapphire substrates ...The light output from LED ...
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Size-dependent capacitance study on InGaN-based micro-light-emitting diodes
... In this work, we present, for the first time, a systematic study of the size-dependent capacitance in InGaN-based µLEDs under reverse and large forward bias, based on AC impedance measurements. µLED clusters ...
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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 performances of ...
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Multispectral time-of-flight imaging using light-emitting diodes
... green brick, blue brick, purple brick, the horse and the saddle, respectively. For comparison, the spectra of each of the bricks was also measured using a commercial spectrometer (Avantes Avaspec-2048L) and halogen ...
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