scholarly journals Возможности применения геометрической оптики для расчетов нано- и микроструктур в фотовольтаике

2019 ◽  
Vol 127 (12) ◽  
pp. 1005
Author(s):  
Е.В. Класс
Keyword(s):  
Optical Properties ◽  
Radiation Transport ◽  
Incident Light ◽  
Estimation Method ◽  
Height Distribution ◽  
Mutual Comparison ◽  
Poor Convergence ◽  
Influence Of Substrate ◽  
Structure Height ◽  
Comparison Of The Results

Numerical simulation of nano and microstructured photovoltaic materials be means radiation transport software may become quite resource-intensive due to poor convergence of the applied optical -properties estimation method. In this paper, applicability of the geometrical optics approximation to microstructure-property modeling was illustrated by mutual comparison of the results of Monte-Carlo simulation in 3D POKS-RG program with a number of available experimental data about optical properties of nano- and microstructures.Numerical simulation accounting peculiar roughness of the surfase as a side effect of etching in microfabrication were in acceptable agreement with the experimental results. The furher analysis revealed essential influence of substrate surfase roughness onto the absorption of the incident light. The aforementioned peculiarity results in nonuniform structure-height distribution of change carriers and might partially cause the modest efficiency of radial p-n junction solar gells.

DEVELOPMENT OF A BLUE TIDE ESTIMATION METHOD BASED ON OPTICAL PROPERTIES OF SULFUR BY GEOSTATIONARY OCEAN COLOR SATELLITE

2019 ◽  
Vol 75 (2) ◽  
pp. I_1057-I_1062
Author(s):  
Hiroto HIGA ◽  
Wataru NAKAMURA ◽  
Shogo SUGAHARA ◽  
Yoshiyuki NAKAMURA ◽  
Takayuki SUZUKI
Keyword(s):  
Optical Properties ◽  
Ocean Color ◽  
Estimation Method

scholarly journals Investigation of a parameter estimation method for contaminant transport in aquifers

2001 ◽  
Vol 3 (4) ◽  
pp. 203-213 ◽  
Author(s):  
Channa Rajanayaka ◽  
Don Kulasiri
Keyword(s):  
Experimental Data ◽  
Hydraulic Conductivity ◽  
Contaminant Transport ◽  
Dispersion Coefficient ◽  
Estimation Method ◽  
Longitudinal Dispersion ◽  
Longitudinal Dispersion Coefficient ◽  
System Noise ◽  
Estimated Parameters ◽  
Comparison Of The Results

Real world groundwater aquifers are heterogeneous and system variables are not uniformly distributed across the aquifer. Therefore, in the modelling of the contaminant transport, we need to consider the uncertainty associated with the system. Unny presented a method to describe the system by stochastic differential equations and then to estimate the parameters by using the maximum likelihood approach. In this paper, this method was explored by using artificial and experimental data. First a set of data was used to explore the effect of system noise on estimated parameters. The experimental data was used to compare the estimated parameters with the calibrated results. Estimates obtained from artificial data show reasonable accuracy when the system noise is present. The accuracy of the estimates has an inverse relationship to the noise. Hydraulic conductivity estimates in a one-parameter situation give more accurate results than in a two-parameter situation. The effect of the noise on estimates of the longitudinal dispersion coefficient is less compared to the effect on hydraulic conductivity estimates. Comparison of the results of the experimental dataset shows that estimates of the longitudinal dispersion coefficient are similar to the aquifer calibrated results. However, hydraulic conductivity does not provide a similar level of accuracy. The main advantage of the estimation method presented here is its direct dependence on field observations in the presence of reasonably large noise levels.

scholarly journals Magneto-Optical Properties of In-Plane Bi-YIG Films with Oblique-Incident Light.

1993 ◽  
Vol 17 (2) ◽  
pp. 157-160
Author(s):  
N. Kawai ◽  
Z. Hirano ◽  
E. Komuro ◽  
T. Namikawa ◽  
Y. Yamazaki
Keyword(s):  
Optical Properties ◽  
Incident Light

scholarly journals Orientation dependence of optical activity in light scattering by nanoparticle clusters

2022 ◽  
Author(s):  
Atefeh Fazel Najafabadi ◽  
Baptiste Auguié
Keyword(s):  
Optical Properties ◽  
Light Scattering ◽  
Optical Activity ◽  
Incident Light ◽  
Spatial Arrangement ◽  
Orientation Dependence ◽  
Nanoparticle Clusters

The optical properties of nanoparticle clusters vary with the spatial arrangement of the constituent particles, but also the overall orientation of the cluster with respect to the incident light. This...

scholarly journals Optical Properties of Spin-Coated TiO2Antireflection Films on Textured Single-Crystalline Silicon Substrates

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Ryosuke Watanabe ◽  
Yohei Eguchi ◽  
Takuya Yamada ◽  
Yoji Saito
Keyword(s):  
Optical Properties ◽  
Crystalline Silicon ◽  
Low Cost ◽  
Incident Light ◽  
Antireflection Coating ◽  
Silicon Wafers ◽  
Reflectance Spectra ◽  
Visible Range ◽  
Single Crystalline Silicon ◽  
Single Crystalline

Antireflection coating (ARC) prepared by a wet process is beneficial for low cost fabrication of photovoltaic cells. In this study, we investigated optical properties and morphologies of spin-coated TiO2ARCs on alkaline textured single-crystalline silicon wafers. Reflectance spectra of the spin-coated ARCs on alkaline textured silicon wafers exhibit no interferences and low reflectance values in the entire visible range. We modeled the structures of the spin-coated films for ray tracing numerical calculation and compared numerically calculated reflectance spectra with the experimental results. This is the first report to clarify the novel optical properties experimentally and theoretically. Optical properties of the spin-coated ARCs without interference are due to the fractional nonuniformity of the thickness of the spin-coated ARCs that cancels out the interference of the incident light.

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