scholarly journals Calculation of the ultimate efficiency of p-n-junction solar cells taking into account the semiconductor absorption coefficient

2016 ◽  
Vol 1 (8) ◽  
pp. 87-89 ◽  
Author(s):  
Mikhail TIVANOV
Keyword(s):  
Solar Cells ◽  
Absorption Coefficient ◽  
Ultimate Efficiency

Investigation Simulation Based on Bio-Energy Local Area Photosensitizer in Increasing Dye-Sensitized Solar Cells (DSSC) Performance

2020 ◽  
Vol 981 ◽  
pp. 66-72
Author(s):  
Edy Supriyanto ◽  
Henry Ayu Kartikasari ◽  
Nova Alviati ◽  
Soni Sisbudi Harsono ◽  
Agus Geter Edy Sutjipto
Keyword(s):  
Solar Cells ◽  
Absorption Coefficient ◽  
High Efficiency ◽  
Dye Sensitized Solar Cells ◽  
Local Area ◽  
Tagetes Erecta ◽  
Lawsonia Inermis ◽  
Dye Sensitized ◽  
Simulation Based ◽  
Sensitized Solar Cells

The photosensitizer is an important part of Dye-Sensitized Solar Cells (DSSC). Photosensitizers function like photosynthesis by absorbing sunlight and turning it into energy. Photosensitizers also contribute to the efficiency of improving DSSC performance. This research is a continuation of previous research to find a candidate for natural and environmentally friendly photosensitizer (bio-energy) based local area in Indonesia. The photosensitizer used in this simulation is Tagetes erecta, Nyctanthes arbor-tritis, Brassica rapa Sub. Sp pekinensis, Delonix regia, Lawsonia inermis, Callistemon citrinus, and Daucus Carota. The purpose of this simulation is finding several candidates for bio-energy local area photosensitizer that produce high efficiency by displaying J-V curves and P-V curves. The highest efficiency was produced by photosensitizer Tagetes erecta at 1.5% [Voc 0.6385 Volt, 0.00383 A / cm2 Jsc, FF 0.605 and Pmax 0.00148 Watt], while the lowest efficiency was produced by photosensitizer Callistemon citrinus at 1.1% [Voc 0.6162 Volt, Jsc 0.0032 A / cm2, FF 0.557 and Pmax 0,0011 Watts]. These simulation results perform that one of reason give influence at DSSC performance is the absorption coefficient value in each bio-energy local area photosensitizer. The absorption coefficient also determines how much efficiency is produced and how much the photosensitizer's ability to absorb sunlight.

scholarly journals New Results in Optical Modelling of Quantum Well Solar Cells

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
Silvian Fara ◽  
Paul Sterian ◽  
Laurentiu Fara ◽  
Mihai Iancu ◽  
Andreea Sterian
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Well ◽  
Absorption Coefficient ◽  
Quantum Efficiency ◽  
Quantum Confinement ◽  
Quantum Confinement Effect ◽  
Refraction Index ◽  
Absorption Process ◽  
Optical Modelling

This project brought further advancements to the quantum well solar cell concept proposed by Keith Barnham. In this paper, the optical modelling of MQW solar cells was analyzed and we focussed on the following topics: (i) simulation of the refraction index and the reflectance, (ii) simulation of the absorption coefficient, (iii) simulation of the quantum efficiency for the absorption process, (iv) discussion and modelling of the quantum confinement effect, and (v) evaluation of datasheet parameters of the MQW cell.

Dye Sensitized Solar Cell Using Natural Dyes as Chromophores - Review

2013 ◽  
Vol 771 ◽  
pp. 39-51 ◽  
Author(s):  
I. Jinchu ◽  
C.O. Sreekala ◽  
K.S. Sreelatha
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Absorption Coefficient ◽  
Metal Oxide ◽  
Organic Dyes ◽  
Dye Sensitized Solar Cells ◽  
Solar Spectrum ◽  
Natural Dyes ◽  
Dye Sensitized Solar Cell ◽  
Dye Sensitized

The molecular dye is an essential component of the Dye sensitized solar cell (DSSC), and improvements in efficiency over the last 15 years have been achieved by tailoring the optoelectronic properties of the dye. The most successful dyes are based on ruthenium bipyridyl compounds, which are characterized by a large absorption coefficient in the visible part of the solar spectrum, good adsorption properties, excellent stability, and efficient electron injection. However, ruthenium-based compounds are relatively expensive, and organic dyes with similar characteristics and even higher absorption coefficients have recently been reported; solar cells with efficiencies of up to 9% have been reported. Organic dyes with a higher absorption coefficient could translate into thinner nanostructured metal oxide films, which would be advantageous for charge transport both in the metal oxide and in the permeating phase, allowing for the use of higher viscosity materials such as ionic liquids, solid electrolytes or hole conductors. Organic dyes used in the DSSC often bear a resemblance to dyes found in plants, fruits, and other natural products, and several dye-sensitized solar cells with natural dyes have been reported. This paper gives an over-view of the recent works in DSSC using the natural dyes as chromophores.

High Efficiency Monolithic Multi-Junction Solar Cells Using Lattice-Mismatched Growth

1998 ◽  
Vol 551 ◽  
Author(s):  
R.W. Hoffman ◽  
N.S. Fatemi ◽  
M.A. Stan ◽  
P. Jenkins ◽  
V.G. Weizer ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Device Performance ◽  
Lattice Match ◽  
New Approach ◽  
Single Junction ◽  
Junction Device ◽  
Ultimate Efficiency ◽  
Conversion Efficiencies

AbstractThe demand for spacecraft power has dramatically increased recently. Higher efficiency, multi-junction devices are being developed to satisfy the demand. The multi-junction cells presently being developed and flown do not employ optimized bandgap combinations for ultimate efficiency due to the traditional constraint of maintaining lattice match to available substrates. We are developing a new approach to optimize the bandgap combination and improve the device performance that is based on relaxing the condition of maintaining lattice match to the substrate. We have designed cells based on this approach, fabricated single junction components cells and tested their performance. We will report on our progress toward achieving beginning-of-life AMO multi-junction device conversion efficiencies above 30%.

scholarly journals A simulation of Gallium Indium Nitride Based Solar Cells

2020 ◽  
Author(s):  
Jin Wu
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Absorption Coefficient ◽  
Indium Nitride ◽  
Solar Spectrum ◽  
Thin Layers ◽  
Gallium Indium Nitride ◽  
Optimal Values ◽  
High Absorption Coefficient ◽  
High Absorption

InGaN can reach all values of bandgap from 3.42 to 0.7eV, which covers almost the entire solar spectrum. This study is to understand the influence of each parameter of the solar cell for an improved optimization of performance. The yield obtained for a reference cell is 12.2 % for optimal values of doping of the layers. For generation and recombination, performance of the cell varies with these settings. III nitrides have a high absorption coefficient, a very thin layers of material are sufficient to absorb most of the light.

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