semiconductor light-emitting diodes
Dendrimer light emitting diodes
... Although great steps have so far been taken towards fully understanding the physics underpinning the behaviour of organic semiconductors there still remains much unknown. In particular, the effect of the conjugated ...
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Surface-Plasmon-Enhanced Light-Emitting Diodes**
... 14-fold PL enhancement and a 6.8-fold IQE enhancement of InGaN QWs by QW-Ag coupling. Despite the significant enhancement of the IQE of InGaN emitters by SPs, the realization of a GaN-based LED structure with QW-SP ...
5
Multispectral time-of-flight imaging using light-emitting diodes
... Despite identical driving conditions, aside from the signal delay, the pulse width and average emitted power varies significantly from one LED to another, as efficiency and frequency response will vary with the ...
15
WATER DISINFECTION USING ULTRAVIOLET-A AND VISIBLE LIGHT-EMITTING DIODES
... a semiconductor that emits visible light when an electric current passes through ...emit light within a very narrow wavelength spectrum and can be considered as a monochromatic ...visible ...
8
Fabrication and characterization of organic light emitting diodes for display applications
... Inorganic light emitting diodes are an important background technology to this ...non-coherent light sources that are capable of producing continuous and efficient illumination from a simple ...
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COMPARISON OF A NEW HOST MATERIAL FOR ORGANIC LIGHT EMITTING DIODES
... Like an LED, an OLED is a solid-state semiconductor device that is 100 to 500 nanometers thick or about 200 times smaller than a human hair. OLEDs can have either two layers or three layers of organic material ...
6
Enhanced performance of nitride based ultraviolet vertical injection light emitting diodes by non insulation current blocking layer and textured surface
... Regular semiconductor processes are used to fabricate the devices. The multilayer metal systems Ni(5 Å)/Ag (1,000 Å)/Ti(300 Å)/Pt(500 Å)/Ti(300 Å)/Pt(500 Å) and Cr (300 Å)/Pt(500 Å)/Au(12,000 Å) were deposited by ...
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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 ...the light extraction efficiency of light-emitting diodes, and the photonic ...
5
Determination of Planck’s Constant using Light Emitting Diodes
... by light-emitting ...a light emitting diode. When a light-emitting diode is switched on, electrons recombine with holes within and release energy in the form of photons which can ...
6
Solvent immersion nanoimprint lithography of fluorescent conjugated polymers
... semiconducting light-emitting polymers make them attractive materials for inexpensive photonic and optoe- lectronic ...organic light-emitting diodes (OLEDs), 1,2 ...
6
The Reflected-Shifted-Truncated-Gamma Distribution for Negatively Skewed Survival Data with Application to Pediatric Nephrotic Syndrome
... costs, semiconductor fabrication technologies are finally in a position to replace the tra- ditional incandescent light ...bulb. Light emitting diodes (LED) are emerging as the ...
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Growth and characterization of thin Cu phthalocyanine films on MgO(001) layer for organic light emitting diodes
... organic semiconductor (OSC) devices, oxide materials have been widely ...enable light to be emitted from the bottom of the struc- ...organic light-emitting diode (OLED) device performance ...
6
Theoretical Studies on Light- Emitting Diodes : A Review
... The Light-emitting diode, commonly known as LED, is a semiconductor p-n junction that under proper forward-biased conditions can emit external spontaneous radiation in the ultraviolet, visible and ...
8
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
... of Semiconductor Devices; DUV: Deep ultraviolet light-emitting diodes; EL: Electroluminescence; EQE: External quantum efficiency; HVPE: Hydride Vapor Phase Epitaxy; ICP: Inductively Coupled ...
7
Measuring and structuring the spatial coherence length of organic light emitting diodes
... the light beam passing through a rotating diffuser that consists of 2 outer sticky films (tesafilm) /glass/2 inner sticky ...the light beam from the He-Ne laser without passing through the diffuser exhibits ...
9
ABSTRACT : Haemoglobin is the most important parameter in blood cells of human body. Haemoglobin is the protein
... The invasive method requires painful needle stick to draw a blood sample. Then it is sent to alaboratory for analysis, with results reported back to the physician later, potentially resulting in diagnosis and ...
5
Emerging Transparent Conducting Electrodes for Organic Light Emitting Diodes
... of light outcoupling techniques, a power efficiency of 54 lm/W was achieved, as shown in Figure ...yellow light-emitting polymers consisting of ethoxylated trimethylolpropane triacrylate (ETPTA), ...
15
White organic light emitting diodes with 4 nm metal electrode
... We investigate metal layers with a thickness of only a few nanometers as anode replacement for indium tin oxide (ITO) in white organic light-emitting diodes (OLEDs). The ultrathin metal elec- trodes ...
5
Controlling the emission efficiency of blue green iridium(III) phosphorescent emitters and applications in solution processed organic light emitting diodes
... mCP were selected because they are wide band gap materials with high triplet energies and together can transport both electron and hole well. A 60 nm electron-‐transporting layer 4,6-‐bis(3,5-‐ ...
31
Synthesis And Characterization of Zno-Nanorods By Sol-Gel Method For White Led Phosphors
... We have well chemically synthesized the ZnO nanorods via sol-gel method showing broad luminescence in the visible wavelength range. Their lengths and diameters were 1um and 100nm respectively. X-ray diffraction results ...
7