Projections of GaAs solar-cell performance limits based on two-dimensional numerical simulation

1989 ◽  
Vol 36 (5) ◽  
pp. 897-905 ◽  
Author(s):  
P.D. DeMoulin ◽  
M.S. Lundstrom
Keyword(s):  
Numerical Simulation ◽  
Solar Cell ◽  
Cell Performance ◽  
Two Dimensional ◽  
Performance Limits ◽  
Solar Cell Performance

Band Discontinuity Effect on a-Si:H and a-SiGe:H Solar Cells

1995 ◽  
Vol 377 ◽  
Author(s):  
X. Xu ◽  
A. Banerjee ◽  
J. Yang ◽  
S. Guha ◽  
K. Vasanth ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Valence Band ◽  
Cell Performance ◽  
Experimental Results ◽  
Microcrystalline Silicon ◽  
Solar Cell Performance ◽  
Single Junction ◽  
P Type

ABSTRACTThe electrical bandgap of microcrystalline silicon (μc-Si:H) p type layers used in a-Si:H alloy solar cells and the band edge discontinuities between μc-Si:H and a-Si:H alloys have been determined by internal photoemission measurements. The bandgap of μc-Si:H is found to be in the range of 1.50 to 1.57 eV, and the discontinuities at the conduction and the valence band edges are 0 to 0.07 and 0.26 to 0.35 eV, respectively. Use of these parameters in the numerical simulation of single-junction a-Si:H and a-SiGe:H alloy solar cells is found to predict experimental results of solar cell performance.

Impact of Nonuniformities on Thin Cu(In,Ga)Se2 Solar Cell Performance

2007 ◽  
Vol 1012 ◽  
Author(s):  
Ana Kanevce ◽  
James R. Sites
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Cell Performance ◽  
Device Performance ◽  
Back Contact ◽  
Two Dimensional ◽  
Solar Cell Performance ◽  
Voltage Loss ◽  
Dimensional Network ◽  
Diode Voltage

AbstractSolar-cell performance degradation due to physical nonuniformities becomes more significant as the thickness of polycrystalline absorbers is reduced. “Voltage” nonuniformities such as those due to band-gap fluctuations, variations in the back-contact proximity, and areas where the absorber is completely depleted can have very significant impact on cell performance. Similarly local shunts can seriously degrade the efficiency. “Current” nonuniformities such as optical defects have generally much less impact. The analysis presented is based on Cu(In,Ga)Se2 cells, but the qualitative results should be applicable to thin-absorber devices in general. For lateral nonuniformity studies, the solar cell is simulated by a two dimensional network of parallel diodes separated by resistors. The nonuniformities are approximated by small regions of reduced photovoltage, often referred to as “weak diodes”, and by isolated shunt resistors. The weak-diode approach allows investigation of device performance as a function of the weak-diode voltage deficit, the ratio of weak-to strong-diode area, and the weak diodes' spatial distribution. Increased TCO resistance can isolate weak diodes, thus limiting the voltage loss due to nonuniformities, but increasing fill-factor losses.

Two-dimensional CdS intercalated ZnO nanorods: a concise study on interfacial band structure modification

RSC Advances ◽  
2016 ◽  
Vol 6 (57) ◽  
pp. 52395-52402 ◽  
Author(s):  
Hind Fadhil Oleiwi ◽  
Sin Tee Tan ◽  
Hock Beng Lee ◽  
Chi Chin Yap ◽  
Riski Titian Ginting ◽  
...  
Keyword(s):  
Solar Cell ◽  
Band Structure ◽  
Band Gap ◽  
Optical Band Gap ◽  
Zno Nanorods ◽  
Cell Performance ◽  
Two Dimensional ◽  
Structure Modification ◽  
Solar Cell Performance

The intercalation of CdS on ZnO nanorods modified the optical band gap effectively and improved the solar cell performance significantly.

scholarly journals Study of Black Silicon Wafer through Wet Chemical Etching for Parametric Optimization in Enhancing Solar Cell Performance by PC1D Numerical Simulation

Crystals ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 881
Author(s):  
Md. Yasir Arafat ◽  
Mohammad Aminul Islam ◽  
Ahmad Wafi Bin Mahmood ◽  
Fairuz Abdullah ◽  
Tiong Sieh Kiong ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Refractive Index ◽  
Solar Cell ◽  
Doping Concentration ◽  
Anisotropic Etching ◽  
Cell Performance ◽  
Etching Process ◽  
Black Silicon ◽  
Solar Cell Performance ◽  
Wet Chemical

Black silicon (BSi) fabrication via surface texturization of Si-wafer in recent times has become an attractive concept regarding photon trapping and improved light absorption properties for photovoltaic applications. In this study, surface texturization has been conducted on mono-crystalline Si(100) wafer using a wet chemical anisotropic etching process with IPA:KOH solution to form micro-pyramidal surface structures. Moreover, the optimized properties of the fabricated BSi wafers are used for numerical simulation using PC1D software to analyze the performance of the solar cell and establish the correlation among relevant parameters. Effects such as doping concentration, texturization, passivation, and anti-reflection coating of BSi on the solar cell performance have numerically been investigated. Results show that textured surface obtained from the wet chemical anisotropic etching process has successfully reduced the reflectance of the BSi wafer and surpassed the solar cell efficiency by 2%, which is mainly attributed to the optical confinement of the textured pyramids on the surface with a height of 1–2 μm and angles of 70 degrees. Furthermore, the doping concentration of the p-type wafer and n-type emitter were optimized to be 1 × 1016 cm−3 and 1 × 1018 cm−3, respectively. In the case of device optimization, the SiO2 passivation layer with a refractive index of 1.48 and the Si3N4 ARC layer with a refractive index of 2.015 has been identified as the best combination for the solar cell performance. These optimized parameters eventually result in 23.14% conversion efficiency from numerical simulation for solar cells that use black silicon wafers as fabricated in this study.

Experimental and Theoretical Comparable Study of Pure and Zinc Porphyrin Surface Modified ZnO Nanorod Arrays for Hybrid Solar Cell Applications

2020 ◽  
pp. 114-119
Keyword(s):  
Solar Cell ◽  
Electrochemical Impedance ◽  
Hybrid Solar Cell ◽  
Cell Performance ◽  
Solar Cell Performance ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Annealing Effects ◽  
Vertically Aligned ◽  
Surface Modified

Experimental and theoretical study Porphyrin-grafted ZnO nanowire arrays were investigated for organic/inorganic hybrid solar cell applications. Two types of porphyrin – Tetra (4-carboxyphenyle) TCPP and meso-Tetraphenylporphine (Zinc-TPP)were used to modify the nanowire surfaces. The vertically aligned nanowires with porphyrin modifications were embedded in graphene-enriched poly (3-hexylthiophene) [G-P3HT] for p-n junction nanowire solar cells. Surface grafting of ZnO nanowires was found to improve the solar cell efficiency. There are different effect for the two types of porphyrin as results of Zn existing. Annealing effects on the solar cell performance were investigated by heating the devices up to 225 °C in air. It was found that the cell performance was significantly degraded after annealing. The degradation was attributed to the polymer structural change at high temperature as evidenced by electrochemical impedance spectroscopy measurements.

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