White light-emitting diodes
The fabrication of white light emitting diodes using the n ZnO/NiO/p GaN heterojunction with enhanced luminescence
... Cheap and efficient white light-emitting diodes (LEDs) are of great interest due to the energy crisis all over the world. Herein, we have developed heterojunction LEDs based on the ...
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A novel randomly textured phosphor structure for highly efficient white light emitting diodes
... years, white light-emitting diodes (LEDs) have become important sources of illumination because of their high brightness, reliability, low power consump- tion, and long lifetime compared to ...
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The origin of the red emission in n ZnO nanotubes/p GaN white light emitting diodes
... of light, thus enhancing light emission and extraction efficiency ...on white light emitting diodes (LEDs) are available in the literature ...
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Red Emitting Caal3(PO4)3F2:Eu3+ Phosphor for White Light Emitting Diodes
... The Red-emitting phosphors of Eu 3+ activated phosphate based phosphors prepared by combustion synthesis, characterized by XRD (X-ray diffraction), SEM (Scanning electron microscopy) and Photoluminescence (PL) ...
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Light emitting diodes enhanced by localized surface plasmon resonance
... Light-emitting diodes [LEDs] have attracted much scientific and commercial interest since the realization of a practical LED device with emission frequencies in the visible region of the ...
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Theoretical Studies on Light- Emitting Diodes : A Review
... Temperature- White light may be classified as being warm, neutral or cold and is referenced with respect to the white light emitted by an ideal white-light source, for example ...
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White top emitting organic light emitting diodes with solution processed nano particle scattering layers
... molecule white top-emitting OLEDs without affecting the electrical performance of the ...improves light outcoupling and increases the efficiency of an already optically optimized white ...
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Emerging Transparent Conducting Electrodes for Organic Light Emitting Diodes
... of white OLEDs using silver nanowires embedded in poly(methyl methacrylate) (PMMA) as the electrode ...of light outcoupling techniques, a power efficiency of 54 lm/W was achieved, as shown in Figure ...
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The influence of type I and type II triplet multiple quantum well structure on white organic light emitting diodes
... However, when Bphen or BCP acts as PBL instead of TPBi, low EL performances (especially for BCP) are obtained, which are attributed to poor level alignment at the interface of EML/PBL for type-II MQW structure; thus, ...
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OCIS codes: ( ) Light-Emitting Diodes; ( ) Optoelectronics.
... complete light-extraction will be demonstrated through the pervasive control of the refractive index and its spatial ...in white LEDs, the trend towards remote phosphor structures [4] and specularly ...
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WATER DISINFECTION USING ULTRAVIOLET-A AND VISIBLE LIGHT-EMITTING DIODES
... 149 | P a g e Treatment of water sample having a depth of 0.75 cm by using UV-A LEDs and White LEDs achieved a 4 log reduction in faecal coliforms within 5 hours. Treatment using Blue LEDs also showed 3.36 log ...
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Enhanced light emission from top emitting organic light emitting diodes by optimizing surface plasmon polariton losses
... Furthermore, we have found that the combination of the opaque aluminum anode and the proposed low refractive index HTL produces an oSPP resonance propagating as a nonevanescent plane wave within the layers of the optical ...
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Light-Emitting Diodes in the Solid-State Lighting Systems
... blue light from semiconductors in the early 1990s. Red and green emitting diodes had been already produced and used from several years, but without a blue emitting diode, the white ...
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Multispectral time-of-flight imaging using light-emitting diodes
... a white sheet of paper placed 40 cm from the camera, for determining the time bin ranges and for the cross correlation ...more light in the expected channels, such as the intense reflection of red (659 - ...
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Recent advances in light outcoupling from white organic light emitting diodes
... proprietary white OLED stack (phosphorescent, tandem architecture) on top of this structure and applying thin- film antireflection coatings to both sides of the glass substrate, a luminous efficacy of 133 lm ∕ W ...
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Color Tunable Hybrid White Organic Light Emitting Diodes with Double Interlayers
... hybrid white organic light-emitting diode is dem- onstrated with double interlayers of 2,7-bis(carbazol-9-yl)-9,9-ditoylfluo- rene/2-(diphenylphosphoryl) spirofluorene (DMFL-CBP/SPPO1) inserted be- ...
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White organic light emitting diodes with 4 nm metal electrode
... It is therefore important to investigate the emission at different viewing angles for the white OLEDs containing thin metal electrodes (Fig. 2(c)). The associated spectral ra- diant intensity is given in the ...
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Colour tuning in white hybrid inorganic/organic light-emitting diodes
... good white light emission with a 1% (w/v) concentration, different volumes of this concentration ranging between ...yellow light with increasing thickness ...blue light by the accumulated ...
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Cool to warm white light emission from hybrid inorganic/organic light-emitting diodes
... (UV) light (254 nm) to form a hard encapsu- lant, which also protects the ...the light emission, with the software return- ing colorimetry values which are generated from the detected response-corrected ...
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EFFICIENT BLUE LIGHT-EMITTING DIODES LEADING TO BRIGHT AND ENERGY-SAVING WHITE LIGHT SOURCES
... Laboratories in the USA in 1947 (Nobel Prize 1956 to Shockley, Bardeen and Brattain). It became clear that a p-n junction could be an interesting device for light emission. In 1951, K. Lehovec and co-workers of ...
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