scholarly journals Electrical characterization of fluorinated benzothiadiazole based conjugated copolymer – a promising material for high-performance solar cells

AIP Advances ◽  
2015 ◽  
Vol 5 (12) ◽  
pp. 127240 ◽  
Author(s):  
J. Toušek ◽  
J. Toušková ◽  
Z. Remeš ◽  
R. Chomutová ◽  
J. Čermák ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Electrical Characterization ◽  
Promising Material ◽  
Conjugated Copolymer

Physical and electrical characterization of high-performance Cu 2 ZnSnSe 4 based thin film solar cells

2015 ◽  
Vol 582 ◽  
pp. 224-228 ◽  
Author(s):  
S. Oueslati ◽  
G. Brammertz ◽  
M. Buffière ◽  
H. ElAnzeery ◽  
O. Touayar ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
High Performance ◽  
Electrical Characterization ◽  
Thin Film Solar Cells

Development of High-Performance GaAs Solar Cells on Large-Grain Polycrystalline Ge Substrates

1995 ◽  
Vol 403 ◽  
Author(s):  
R. Venkatasubramanian ◽  
B. O'Quinn ◽  
J. S. Hills ◽  
M. L. Timmons ◽  
D. P. Malta
Keyword(s):  
Solar Cells ◽  
High Performance ◽  
Carrier Lifetime ◽  
Minority Carrier ◽  
Minority Carrier Lifetime ◽  
Cross Sectional ◽  
Plan View ◽  
Electron Beam Induced Current ◽  
Induced Defects

AbstractThe characterization of MOCVD-grown GaAs-AlGaAs materials and GaAs p+n junctions on poly-Ge substrates is presented. Minority carrier lifetime in GaAs-AIGaAs double-hetero (DH) structures grown on these substrates and the variation of lifetimes across different grainstructures are discussed. Minority-carrier diffusion lengths in polycrystalline GaAs p+-n junctions were evaluated by cross-sectional electron-beam induced current (EBIC) scans. The junctions were also studied by plan-view EBIC imaging. Optimization studies of GaAs solar cell on poly-Ge are discussed briefly. The effect of various polycrystalline substrate-induced defects on performance of GaAs solar cells are presented.

Preparation of CIGSS Thin-Film Solar Cells by Rapid Thermal Processing

2006 ◽  
Vol 129 (3) ◽  
pp. 323-326
Author(s):  
Sachin S. Kulkarni ◽  
Jyoti S. Shirolikar ◽  
Neelkanth G. Dhere
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Thermal Processing ◽  
Rapid Thermal Processing ◽  
Electrical Characterization ◽  
Soda Lime ◽  
Thin Film Solar Cells ◽  
Soda Lime Glass ◽  
X Ray

Rapid thermal processing (RTP) provides a way to rapidly heat substrates to an elevated temperature to perform relatively short duration processes, typically less than 2–3min long. RTP can be utilized to minimize the process cycle time without compromising process uniformity, thus eliminating a bottleneck in CuIn1−xGaxSe2−ySy (CIGSS) module fabrication. Some approaches have been able to realize solar cells with conversion efficiencies close or equal to those for conventionally processed solar cells with similar device structures. A RTP reactor for preparation of CIGSS thin films on 10cm×10cm substrates has been designed, assembled, and tested at the Florida Solar Energy Center’s PV Materials Lab. This paper describes the synthesis and characterization of CIGSS thin-film solar cells by the RTP technique. Materials characterization of these films was done by scanning electron microscopy, x-ray energy dispersive spectroscopy, x-ray diffraction, Auger electron spectroscopy, electron probe microanalysis, and electrical characterization was done by current–voltage measurements on soda lime glass substrates by the RTP technique. Encouraging results were obtained during the first few experimental sets, demonstrating that reasonable solar cell efficiencies (up to 9%) can be achieved with relatively shorter cycle times, lower thermal budgets, and without using toxic gases.

Electrical characterization of defects in Cu(In,Ga)Se2 solar cells containing a ZnSe or a CdS buffer layer

2001 ◽  
Vol 387 (1-2) ◽  
pp. 231-234 ◽  
Author(s):  
M Munzel ◽  
C Deibel ◽  
V Dyakonov ◽  
J Parisi ◽  
W Riedl ◽  
...  
Keyword(s):  
Solar Cells ◽  
Buffer Layer ◽  
Electrical Characterization

scholarly journals Natural Dyes from Mortiño (Vaccinium floribundum) as Sensitizers in Solar Cells

Energies ◽  
2020 ◽  
Vol 13 (4) ◽  
pp. 785 ◽  
Author(s):  
Miguel A. Taco-Ugsha ◽  
Cristian P. Santacruz ◽  
Patricio J. Espinoza-Montero
Keyword(s):  
High Performance Liquid Chromatography ◽  
Solar Cells ◽  
Liquid Chromatography ◽  
Solar Cell ◽  
High Performance ◽  
Power Conversion ◽  
Natural Dyes ◽  
The Cost ◽  
Layer Chromatography

Photovoltaic energy presents environmental advantages; however, these advantages are limited by the cost of manufacturing solar cells and in many cases, scarce or dangerous materials are incorporated. Therefore, the use of natural dyes from mortiño (Vaccinium floribundum) as sensitizers in solar cells is proposed. The dyes were extracted by maceration in acidified methanol (HCl, citric acid and trifluoroacetic acid TFA) and were characterized by High-Performance Liquid Chromatography (HPLC), Thin-Layer Chromatography (TLC) and spectrometric methods (UV-Vis, IR and MS-MALDI). The construction and characterization of cells were in standard conditions. The study confirms that pigments in mortiño are flavonoids of the anthocyanidin group as: cyanidin-3-galactoside, and cyanidin-3-arabinoside. The efficiency of solar cells was between 0.18–0.26%; the extraction with TFA in methanol leads to the best performance. Although they have low power conversion efficiency, mortiño dyes could be an alternative to artificial sensitizers for solar cell technologies because they are harmless and abundant substances.

scholarly journals Electrical characterization of CIGS thin-film solar cells by two- and four-wire probe technique

2020 ◽  
Vol 34 (11) ◽  
pp. 2050102
Author(s):  
Amirhosein Mosavi ◽  
Beszedes Bertalan ◽  
Felde Imre ◽  
Laszlo Nadai ◽  
Nima E. Gorji
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Current Density ◽  
Ideality Factor ◽  
Electrical Characterization ◽  
Load Resistance ◽  
Internal Resistance ◽  
Thin Film Solar Cells ◽  
Wire Probe

A precise characterization of thin-film solar cells is of huge importance for obtaining high open-circuit voltage and low recombination rates from the interfaces or within the bulk of the main materials. Among many electrical characterization techniques, the two- and four-wire probe using the Cascade instrument is of interest since the resistance of the wires and the electrical contacts can be excluded by the additional two wires in four-wire probe configuration. In this paper, both two- and four-point probes configuration are employed to characterize the CIGS chalcogenide thin-film solar cells. The two-wire probe has been used to measure the current–voltage characteristics of the cell which results in a huge internal resistance. Therefore, the four-wire connection is also used to eliminate the load resistance to enhance the characterization’s accuracy. The load resistance in the two-wire probe diminishes the photogenerated current density at smaller voltage ranges. In contrast, the proposed four-wire probe collects more current at higher voltages due to enhanced carrier collection efficiency from contact electrodes. The current conduction mechanism is also identified at every voltage region represented by the value of the ideality factor of that voltage region. It is observed that a longer time given to the charge collection results in increased current density at a higher voltage. According to the results and device characteristics, a novel double-diode model is suggested to extract the saturation current density, shunt and series resistances and ideality factor of the cells. These cells are shown to be efficient in terms of low recombination at the interfaces and with lower series resistance as the quality of the materials is in its most possible conductive form. The measured internal resistance and saturation current density and ideality factor of the two measurement configurations are measured and compared.

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