Development of performance- and cost-oriented HD PDP TV with high picture quality using a high-efficiency hexagonal array structure

2004 ◽  
Vol 12 (3) ◽  
pp. 251 ◽  
Author(s):  
Min-Sun Yoo ◽  
Jeong-Nam Kim ◽  
Dong-Ju Woo ◽  
Sang-Hoon Yim ◽  
Yoon-Hyoung Cho
Keyword(s):  
High Efficiency ◽  
Picture Quality ◽  
Hexagonal Array ◽  
Array Structure

Broadband Absorptance High Efficiency Silicon Nanowire Fractal Arrays for Photovoltaic Applications

2014 ◽  
Vol 1707 ◽  
Author(s):  
Omar H. Alzoubi ◽  
Husam Abu-Safe ◽  
Khalid Alshurman ◽  
Hameed A. Naseem
Keyword(s):  
High Efficiency ◽  
Crystalline Silicon ◽  
Light Trapping ◽  
Silicon Nanowire ◽  
Nanowire Array ◽  
Normal Incidence ◽  
Hexagonal Array ◽  
Equivalent Thickness ◽  
Array Structure ◽  
Photovoltaic Solar Cells

ABSTRACTNanowire arrays have been proposed to enhance light trapping, increase efficiencies, and reduced material cost in photovoltaic solar cells. In this work we present a new crystalline silicon nanowire array structure, inspired by fractal geometry. The array structure is assumed to be an infinite 2D array in the x and y directions, and composed of vertically aligned SiNW suspended in air. Hexagonal fractal-like geometry is adapted in arranging cylindrical SiNW in these arrays. Full-wave finite element method 3D simulation is used to compute reflectance, transmittance and absorptance of the array for a normal incidence plane wave. The proposed fractal-like distribution of SiNW arrays yield broad absorption spectrum and enhanced efficiency while using less material. The efficiency of the proposed fractal-like SiNW arrays achieve ∼100% enhancement over that of the equivalent thickness flat c-Si film, and ∼18% enhancement over an equivalent height hexagonal array. The proposed optimized structures achieved a filling ratio ∼25%, which is ∼33% less than the corresponding hexagonal array.

11.2: Optimization of Delta Color Array for High-Definition PDP with High-Efficient Hexagonal Array Structure

2003 ◽  
Vol 34 (1) ◽  
pp. 140 ◽  
Author(s):  
Cha Keun Yoon ◽  
Jung Keun Ahn ◽  
Yong Jun Kim ◽  
Sung Hun Yoo ◽  
Byung Hak Lee ◽  
...  
Keyword(s):  
Hexagonal Array ◽  
High Definition ◽  
High Efficient ◽  
Array Structure

HEXAGONAL ARRAY STRUCTURE FOR 2D NDE APPLICATIONS

2010 ◽  
Author(s):  
J. Dziewierz ◽  
S. N. Ramadas ◽  
A. Gachagan ◽  
R. L. O’Leary ◽  
Donald O. Thompson ◽  
...  
Keyword(s):  
Hexagonal Array ◽  
Array Structure

scholarly journals A low-cost, high-efficiency light absorption structure inspired by the Papilio ulysses butterfly

RSC Advances ◽  
2017 ◽  
Vol 7 (37) ◽  
pp. 22749-22756 ◽  
Author(s):  
Wanlin Wang ◽  
Wang Zhang ◽  
Di Zhang ◽  
Guo Ping Wang
Keyword(s):  
Light Absorption ◽  
Solar Collector ◽  
High Efficiency ◽  
Low Cost ◽  
Hole Array ◽  
Array Structure

The nano-hole array structure in the black scales of the butterfly can be viewed as a natural solar collector.

Light Trapping Potential of Hexagonal Array Silicon Nanohole Structure for Solar Cell Application

2012 ◽  
Vol 512-515 ◽  
pp. 90-96 ◽  
Author(s):  
Nor Afifah Yahaya ◽  
Noboru Yamada ◽  
Tadachika Nakayama
Keyword(s):  
Solar Cell ◽  
Electric Field ◽  
Indium Tin Oxide ◽  
High Efficiency ◽  
Field Enhancement ◽  
Hexagonal Array ◽  
Multiple Reflections ◽  
Solar Cell Application ◽  
Entire Spectrum ◽  
Spectrum Range

The reflectance of the hexagonal array silicon nanohole structure was systematically studied using various measurements and through simulations. It was found that the hexagonal array silicon nanohole can reduce the reflectance along the entire spectrum range by approximately 6%. It is suggested that the enhancement of the electric field intensity at short wavelength is mainly due to the large surface area provided by the nanohole structure, while multiple reflections occurring in the nanohole contribute to electric field enhancement in the long wavelength range. In addition, the simulation of a hexagonal array silicon nanohole coated with a thin layer of indium tin oxide (ITO) was carried out. The results show that reflectance is greatly decreased along nearly the entire spectrum range, except from 400 nm to 440 nm, and almost zero reflectance is achieved at wavelengths from 650 nm to 750 nm. The results provide a practical guideline to the design and fabrication of a low-reflectance, and as a consequence, a high-efficiency hexagonal array silicon nanohole solar cell.

Vapor-phase hydrothermal transformation of a nanosheet array structure Ni(OH)2 into ultrathin Ni3S2 nanosheets on nickel foam for high-efficiency overall water splitting

2018 ◽  
Vol 6 (39) ◽  
pp. 19201-19209 ◽  
Author(s):  
Guoqiang Liu ◽  
Zhongti Sun ◽  
Xian Zhang ◽  
Haojie Wang ◽  
Guozhong Wang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Vapor Phase ◽  
High Efficiency ◽  
Nickel Foam ◽  
Overall Water Splitting ◽  
Nanosheet Array ◽  
Hydrothermal Transformation ◽  
Array Structure

Ultrathin Ni3S2 nanosheets grown on nickel foam are thermodynamically favourable for hydrazine adsorption and oxidation, exhibiting superior H2 generation performance.

Microcalorimeters for X-Ray Spectroscopy

1988 ◽  
Vol 102 ◽  
pp. 41
Author(s):  
E. Silver ◽  
C. Hailey ◽  
S. Labov ◽  
N. Madden ◽  
D. Landis ◽  
...  
Keyword(s):  
High Resolution ◽  
High Efficiency ◽  
Thermal Response ◽  
Low Noise ◽  
High Resolution Spectroscopy ◽  
Superconducting Transition ◽  
Sapphire Substrates ◽  
Laboratory Plasmas ◽  
Adiabatic Demagnetization ◽  
Theoretical Predictions

The merits of microcalorimetry below 1°K for high resolution spectroscopy has become widely recognized on theoretical grounds. By combining the high efficiency, broadband spectral sensitivity of traditional photoelectric detectors with the high resolution capabilities characteristic of dispersive spectrometers, the microcalorimeter could potentially revolutionize spectroscopic measurements of astrophysical and laboratory plasmas. In actuality, however, the performance of prototype instruments has fallen short of theoretical predictions and practical detectors are still unavailable for use as laboratory and space-based instruments. These issues are currently being addressed by the new collaborative initiative between LLNL, LBL, U.C.I., U.C.B., and U.C.D.. Microcalorimeters of various types are being developed and tested at temperatures of 1.4, 0.3, and 0.1°K. These include monolithic devices made from NTD Germanium and composite configurations using sapphire substrates with temperature sensors fabricated from NTD Germanium, evaporative films of Germanium-Gold alloy, or material with superconducting transition edges. A new approache to low noise pulse counting electronics has been developed that allows the ultimate speed of the device to be determined solely by the detector thermal response and geometry. Our laboratory studies of the thermal and resistive properties of these and other candidate materials should enable us to characterize the pulse shape and subsequently predict the ultimate performance. We are building a compact adiabatic demagnetization refrigerator for conveniently reaching 0.1°K in the laboratory and for use in future satellite-borne missions. A description of this instrument together with results from our most recent experiments will be presented.

Imaging and diffraction modes in Scanning Transmission Electron Microscopy

1986 ◽  
Vol 44 ◽  
pp. 684-687
Author(s):  
J. M. Cowley ◽  
R. Glaisher ◽  
J. A. Lin ◽  
H.-J. Ou
Keyword(s):  
Scanning Transmission Electron Microscopy ◽  
High Efficiency ◽  
Fiber Optic ◽  
Image Intensifier ◽  
Detector System ◽  
Detector Plane ◽  
Secondary Electrons ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Special Detector

Some of the most important applications of STEM depend on the variety of imaging and diffraction made possible by the versatility of the detector system and the serial nature, of the image acquisition. A special detector system, previously described, has been added to our STEM instrument to allow us to take full advantage of this versatility. In this, the diffraction pattern in the detector plane may be formed on either of two phosphor screens, one with P47 (very fast) phosphor and the other with P20 (high efficiency) phosphor. The light from the phosphor is conveyed through a fiber-optic rod to an image intensifier and TV system and may be photographed, recorded on videotape, or stored digitally on a frame store. The P47 screen has a hole through it to allow electrons to enter a Gatan EELS spectrometer. Recently a modified SEM detector has been added so that high resolution (10Å) imaging with secondary electrons may be used in conjunction with other modes.

Influence of MBE Growth Conditions on Dislocation Densities of GaAs/Ge Epilayers Grown on Silicon Substrates

1985 ◽  
Vol 43 ◽  
pp. 364-365
Author(s):  
K.M. Hones ◽  
P. Sheldon ◽  
B.G. Yacobi ◽  
A. Mason
Keyword(s):  
High Efficiency ◽  
Lattice Mismatch ◽  
Low Cost ◽  
Growth Conditions ◽  
Nonradiative Recombination ◽  
Device Structure ◽  
Si Substrates ◽  
Transmission Electron ◽  
Dislocation Densities ◽  
Dislocation Type

There is increasing interest in growing epitaxial GaAs on Si substrates. Such a device structure would allow low-cost substrates to be used for high-efficiency cascade- junction solar cells. However, high-defect densities may result from the large lattice mismatch (∼4%) between the GaAs epilayer and the silicon substrate. These defects can act as nonradiative recombination centers that can degrade the optical and electrical properties of the epitaxially grown GaAs. For this reason, it is important to optimize epilayer growth conditions in order to minimize resulting dislocation densities. The purpose of this paper is to provide an indication of the quality of the epitaxially grown GaAs layers by using transmission electron microscopy (TEM) to examine dislocation type and density as a function of various growth conditions. In this study an intermediate Ge layer was used to avoid nucleation difficulties observed for GaAs growth directly on Si substrates. GaAs/Ge epilayers were grown by molecular beam epitaxy (MBE) on Si substrates in a manner similar to that described previously.

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