Are the Current Models Helpful to Understanding Staebler-Wronski Degradation?

2004 ◽  
Vol 808 ◽  
Author(s):  
Bolko von Roedern
Keyword(s):  
Experimental Data ◽  
Solar Cells ◽  
Physical Process ◽  
Bond Breaking ◽  
Experimental Stress ◽  
Recovery Mechanisms ◽  
Quantitative Understanding ◽  
Fundamental Physical

ABSTRACTThis contribution reviews the compatibility of Staebler-Wronski models with experimental data and observations. The review will show that neither the “bond-breaking models” (originally proposed by Dersch and Stutzmann) nor the “defect conversion” models (originally proposed by Adler) can explain all observations on films and/or solar cells. It has been well accepted for some time that experimental stress and recovery phenomena, both on films and devices, always identify both “slow” and “fast” degradation and recovery mechanisms. It is argued that the quintessential understanding of the Staebler-Wronski mechanisms will come from identifying a fundamental physical process that provides a quantitative understanding of the “coupling” between the slow and fast mechanisms.

scholarly journals C-VCalculations in CdS/CdTe Thin Films Solar Cells with aCdSxTe1-xInterlayer

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
A. Gonzalez-Cisneros ◽  
F. L. Castillo-Alvarado ◽  
J. Ortiz-Lopez ◽  
G. Contreras-Puente
Keyword(s):  
Experimental Data ◽  
Thin Films ◽  
Solar Cells ◽  
Photovoltaic Cells ◽  
Cdte Film ◽  
Vapor Transport ◽  
Cdte Solar Cells ◽  
Cdte Thin Films ◽  
Cds Film ◽  
Theoretical Results

In CdS/CdTe solar cells, chemical interdiffusion at the interface gives rise to the formation of an interlayer of the ternary compoundCdSxCdTe1-x. In this work, we evaluate the effects of this interlayer in CdS/CdTe photovoltaic cells in order to improve theoretical results describing experimentalC-V(capacitance versus voltage) characteristics. We extended our previous theoretical methodology developed on the basis of three cardinal equations (Castillo-Alvarado et al., 2010). The present results provide a better fit to experimental data obtained from CdS/CdTe solar cells grown in our laboratory by the chemical bath deposition (for CdS film) and the close-spaced vapor transport (for CdTe film) techniques.

Analytic Modeling of the of J–V Characteristics of Quantum Dot-Based Photovoltaic Cells

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940083
Author(s):  
A. Yu. Saunina ◽  
V. R. Nikitenko ◽  
A. A. Chistyakov ◽  
M. A. Zvaizgne ◽  
A. R. Tameev ◽  
...  
Keyword(s):  
Experimental Data ◽  
Solar Cells ◽  
Quantum Dot ◽  
Power Conversion Efficiency ◽  
Predictive Power ◽  
Diffusion Length ◽  
Power Conversion ◽  
Photovoltaic Cells ◽  
Analytic Model ◽  
Photovoltaic Devices

An analytic model of [Formula: see text]–[Formula: see text] characteristics of photovoltaic devices based on quantum dot (QD) solids is developed. The model yields the upper estimation of the power conversion efficiency and predicts its extremal dependence on the diffusion length of excitons. The predictive power of our model is approved by the comparison with the experimental data for PbS QD-based solar cells.

LINEAR ELASTICITY AND POTENTIAL THEORY: A COMMENT ON GURTIN (1972)

2008 ◽  
Vol 22 (28) ◽  
pp. 5035-5039 ◽  
Author(s):  
FALK H. KOENEMANN
Keyword(s):  
Potential Theory ◽  
Linear Theory ◽  
Elastic Deformation ◽  
Physical Process ◽  
Linear Elasticity ◽  
Short Note ◽  
Theory Of Elasticity ◽  
Divergence Free ◽  
Fundamental Physical

In an exhaustive presentation of the linear theory of elasticity by Gurtin [The Linear Theory of Elasticity (Springer-Verlag, 1972)], the author included a chapter on the relation of the theory of elasticity to the theory of potentials. Potential theory distinguishes two fundamental physical categories: divergence-free and divergence-involving problems. From the criteria given in the source quoted by the author, it is evident that elastic deformation of solids falls into the latter category. It is documented in this short note that the author presented volume-constant elastic deformation as a divergence-free physical process, systematically ignoring all the information that was available to him that this is not so.

Multiscale Modeling of Dye Solar Cells and Comparison With Experimental Data

2010 ◽  
Vol 16 (6) ◽  
pp. 1611-1618 ◽  
Author(s):  
Alessio Gagliardi ◽  
Simone Mastroianni ◽  
Desiree Gentilini ◽  
Fabrizio Giordano ◽  
Andrea Reale ◽  
...  
Keyword(s):  
Experimental Data ◽  
Solar Cells ◽  
Multiscale Modeling ◽  
Dye Solar Cells ◽  
Comparison With Experimental Data

Computer Simulation of Solid Electrolyte Fuel Cells

1990 ◽  
Vol 112 (2) ◽  
pp. 114-123 ◽  
Author(s):  
W. R. Dunbar ◽  
R. A. Gaggioli
Keyword(s):  
Experimental Data ◽  
Fuel Cells ◽  
Solid Electrolyte ◽  
Simulated Performance ◽  
Voltage Loss ◽  
Overall Performance ◽  
Further Development ◽  
Fundamental Physical ◽  
Physical Principles ◽  
Made In

This paper presents the results of mathematical modeling of the performance of solid electrolyte fuel cells. The system of fundamental physical equations has been solved using a computer program which was developed expressly for this purpose, in order to simulate the performance of arrays of fuel cells for which experimental data exists in the literature. The comparison of experimental data and simulated performance is excellent. The results of the simulation show the influence of each irreversible process within the fuel cell, quantitatively; that is, the relative importance of each source of inefficiency—and the consequent voltage loss—is determined. Because certain rate constants (for diffusion and for chemical kinetics) employed in the model were obtained by regression, it cannot be claimed that the ability to fit the experimental data is a definitive test of the model; more work is needed for that purpose. Nevertheless, it is shown that (a) modeling of fuel cells on the basis of basic physical principles is a worthwhile venture, (b) the model presented here simulates performance well and warrants further development, and (c) it not only simulates the overall performance of the cells, but also provides the important breakdown of the effects of each irreversibility in the cells. Furthermore, specific recommendations are made in this paper for improving the model.

Passive Cooling Measurements for a Concentrating Photovoltaic Array

1983 ◽  
Vol 105 (4) ◽  
pp. 413-417
Author(s):  
F. K. Deaver ◽  
M. W. Edenburn
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Solar Cells ◽  
Heat Exchanger ◽  
Analytical Model ◽  
Passive Cooling ◽  
Transient Model ◽  
Photovoltaic Array ◽  
Definite Effect

Solar cells in a concentrating photovoltaic array absorb heat that must be removed. One method is to use a finned aluminum heat exchanger whose modeling requires estimating the coefficient of heat transfer from fins to surroundings; transfer depends on such parameters as windspeed and direction, and exchanger design. A transient analytical model has been constructed and applied to experimental data. Coefficients of heat transfer were calculated and correlated with windspeed and direction, which appear to have a definite effect on the overall coefficient. The transient model and apparent relationships between windspeed and convective coefficients are described.

Physical properties of the fluid lipid-bilayer component of cell membranes: a perspective

1991 ◽  
Vol 24 (3) ◽  
pp. 293-397 ◽  
Author(s):  
Myer Bloom ◽  
Evan Evans ◽  
Ole G. Mouritsen
Keyword(s):  
Experimental Data ◽  
Physical Properties ◽  
Lipid Bilayer ◽  
Cell Membranes ◽  
Biological Function ◽  
Stage Of Development ◽  
Quantitative Understanding ◽  
The Way

The motivation for this review arises from the conviction that, as a result of the mass of experimental data and observations collected in recent years, the study of the physical properties of membranes is now entering a new stage of development. More and more, experiments are being designed to answer specific, detailed questions about membranes which will lead to a quantitative understanding of the way in which the physical properties of membranes are related to and influence their biological function.

Improvement on Electrical Properties of Screen-Printed Crystalline Silicon Solar Cells by Light-Induced Electroplating of Silver

2011 ◽  
Vol 71-78 ◽  
pp. 778-781 ◽  
Author(s):  
Tao Li ◽  
Chun Lan Zhou ◽  
Zhen Gang Liu ◽  
Wen Jing Wang ◽  
Yang Song ◽  
...  
Keyword(s):  
Experimental Data ◽  
Solar Cells ◽  
Electrical Properties ◽  
Seed Layer ◽  
Crystalline Silicon ◽  
Total Power ◽  
Silicon Solar Cells ◽  
Crystalline Silicon Solar Cells ◽  
Electroplating Process ◽  
Screen Printed

In this paper, the improvement on electrical properties of screen-printed crystalline silicon solar cells by light-induced electroplating of silver is studied. Optical losses are analysed by the introduction of scale factor in the calculation. Electrical losses are mainly from the seed layer electrodes, top layer electrodes, the emitter, the base and the contact resistance between silicon and silver. Light-induced electroplating of silver is able to reduce the total power losses of screen-printed solar cells obviously by denser silver electrode. In experiment, the relative increments of I-V parameters as a function of electroplating time for crystalline silicon solar cells with 60μm, 75μm and 90μm wide seed layer electrodes are measured. After light-induced electroplating process, the cells efficiencies of 16.8%, 17.2% and 17.8% have reached on 60μm, 75μm and 90μm wide gridlines screen-printed solar cells, respectively. The calculated results and experimental data show good agreement. Due to the successful verification by comparing between numerical simulation and experimental data, the simulation results could be used to optimize the two-layer electrode structure and light-induced electroplating process.

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