scholarly journals Effect of the Properties of Chalcopyrite Semiconductors on the Physical and Optical Parameters of Cell Layers with CIGS

2021 ◽  
Vol 31 (2) ◽  
pp. 65-72
Author(s):  
Merwan Rachedi ◽  
Abdelkrim Merad ◽  
Giulio Lorenzini ◽  
Hijaz Ahmad ◽  
Younes Menni ◽  
...  
Keyword(s):  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Buffer Layers ◽  
Optical Parameters ◽  
Technological Parameters ◽  
Cigs Solar Cell ◽  
Chalcopyrite Semiconductors ◽  
Cell Layers ◽  
The Impact

In this paper, the impact of various buffers of applying components on the effectiveness of CuInGaSe2 solar cells is studied numerically. The SCAPS software is employed to achieve the investigation. The main parameters of the inspected devices are: the photovoltaic conversion effectiveness (η), the filling factor (FF), short-circuit current (Jsc), and open circuit voltage (Voc). These photovoltaic parameters are analyzed vs. the thickness in the various buffer layers under study. The numerical findings revealed that the most significant conversion effectiveness (23.4%) of the CIGS solar cell is obtained with the CdS buffer layer. An attempt is conducted to improve this efficiency by using the SCAPS and by optimizing the two electrical and technological parameters of the three layers (ZnO, CdS, CIGS).

scholarly journals Impact of RbF-PDT on Cu(In,Ga)Se2 solar cells with CdS and Zn(O,S) buffer layers

2020 ◽  
Vol 11 ◽  
pp. 8
Author(s):  
Ana Kanevce ◽  
Stefan Paetel ◽  
Dimitrios Hariskos ◽  
Theresa Magorian Friedlmeier
Keyword(s):  
Positive Impact ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Buffer Layers ◽  
Performance Loss ◽  
Current Voltage ◽  
The Impact ◽  
Diode Current

Alkali-fluoride post-deposition treatments (PDTs) of Cu(In,Ga)Se2 (CIGS) absorbers have repeatedly resulted in device efficiency improvements, observed mainly due to an open-circuit voltage (Voc) enhancement. Replacement of the CdS buffer layer with a higher band gap alternative can increase the short-circuit current density (Jsc) and also eliminate the use of Cd. In many alternative-buffer attempts, however, the Jsc gain was accompanied by a Voc loss, resulting in some degree of performance loss. In order to better understand the impact of RbF-PDT, we analyze a combination of experimental devices produced in the same in-line CIGS run with and without RbF-PDT in combination with chemical-bath-deposited CdS and Zn(O,S) buffers. Low-temperature current–voltage curves indicate a difference in Rb impact on the CIGS/CdS and CIGS/Zn(O,S) p-n junctions. For example, the diode-current barrier which creates a rollover often observed in RbF-treated CIGS/CdS current–voltage curves is significantly reduced for the CIGS/Zn(O,S) junction. Although the RbF-PDT had a positive impact on both junction partner combinations, the CIGS/Zn(O,S) devices' Voc and fill factor (FF) benefited stronger from the RbF treatment. As a result, in our samples, the Jsc and FF gain balanced the Voc loss, thus reducing the efficiency difference between cells with CdS and Zn(O,S) buffers.

scholarly journals Effects of Hole-Collecting Buffer Layers and Electrodes on the Performance of Flexible Plastic Organic Photovoltaics

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Sungho Woo ◽  
Hong-Kun Lyu ◽  
Yoon Soo Han ◽  
Youngkyoo Kim
Keyword(s):  
Indium Tin Oxide ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Series Resistance ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Buffer Layers ◽  
Large Area

Here we report the influences of the sheet resistance (Rsheet) of a hole-collecting electrode (indium tin oxide, ITO) and the conductivity of a hole-collecting buffer layer (poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate), PEDOT:PSS) on the device performance of flexible plastic organic photovoltaic (OPV) devices. The series resistance (RS) of OPV devices steeply increases with increasingRsheetof the ITO electrode, which leads to a significant decrease of short-circuit current density (JSC) and fill factor (FF) and power conversion efficiency, while the open-circuit voltage (VOC) was almost constant. By applying high-conductivity PEDOT:PSS, the efficiency of OPV devices with highRsheetvalues of 160 Ω/□ and 510 Ω/□ is greatly improved, by a factor of 3.5 and 6.5, respectively. These results indicate that the conductivities of ITO and PEDOT:PSS will become more important to consider for manufacturing large-area flexible plastic OPV modules.

scholarly journals Investigation of the energy efficiency of horizontally mounted solar module soiled with CaCo3

2017 ◽  
Vol 15 (2) ◽  
pp. 57-69 ◽  
Author(s):  
Ivana Radonjic ◽  
Tomislav Pavlovic
Keyword(s):  
Energy Efficiency ◽  
Calcium Carbonate ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Pv System ◽  
Solar Module ◽  
The Impact

Soiling is a term used to describe the deposition of dust (dirt) on solar modules, which reduces the amount of solar radiation reaching the solar cells. Deposition of dust on solar modules can make the operation of the entire PV system - more difficult and, therefore, lead to the generation of less electric energy. Soiling of solar modules also influences solar modules parameters (short-circuit current, open-circuit voltage, maximum power, fill factor and efficiency). This paper presents the results of the investigation on the impact different quantities of calcium carbonate (CaCO3) deposition have on the energy efficiency of horizontally mounted solar modules. The short-circuit current, power and efficiency decrease with increasing the mass of CaCO3 deposited on the horizontally mounted solar module. The open-circuit voltage and fill factor very slightly increase with increasing the mass of CaCO3 deposited on the horizontally mounted solar module. Upon soiling with 1 g of calcium carbonate, the solar module efficiency decreased by 4.6% in relation to the clean solar module, upon soiling with 2 g of calcium carbonate it decreased by 6.0%, and upon soiling with 3 g of calcium carbonate it decreased by 12.9% in relation to the clean solar module. It can be concluded that the power and energy efficiency of the solar module decrease due to the increased amount of calcium carbonate.

scholarly journals Theoretical Aspect of Physical Phenomena in Inorganic Photovoltaic Cells. Electrical Modeling and Numerical Simulation

2021 ◽  
Vol 297 ◽  
pp. 01024
Author(s):  
Mohammed Azza ◽  
Jabran Daaif ◽  
Abd Elhadi Chahid ◽  
Mohammed Salah ◽  
Said Belaaouad
Keyword(s):  
Spectral Response ◽  
Short Circuit ◽  
Theoretical Aspect ◽  
Short Circuit Current ◽  
Photovoltaic Cell ◽  
Open Circuit ◽  
Hole Transport ◽  
Rlc Circuit ◽  
Physical Phenomena ◽  
The Impact

This work is based on the development of a theoretical model describing the drift and diffusion transport of photogenerated charge carriers and the impact of space charge on this transport in relation to the different physical phenomena characterizing the photovoltaic conversion in an inorganic silicon-based cell. In a second step, we used a numerical solution of the transport differential equations based on the Runge-Kutta algorithm in the framework of the finite difference method, This led us to an electrical model of the photovoltaic cell and of the photo-generated currents by RLC circuit equipped with a diode modeling the direction of electron and hole transport and allowed us to study the relations between the optical and electrical properties of the cell, as well as the influence of the different concentrations of impurities used for the n-type and p-type doping of the silicon on the properties of absorption of the light photons, the spectral response as well as the conductivity, the open-circuit potential and the short-circuit current.

scholarly journals Enhanced Photovoltaic Performance in D-π-A Copolymers Containing Triisopropylsilylethynyl-Substituted Dithienobenzodithiophene by Modulating the Electron-Deficient Units

Polymers ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 12 ◽  
Author(s):  
Junfeng Tong ◽  
Lili An ◽  
Jie Lv ◽  
Pengzhi Guo ◽  
Xunchang Wang ◽  
...  
Keyword(s):  
Polymer Solar Cells ◽  
Short Circuit ◽  
Photovoltaic Performance ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Orbital Energy ◽  
Polymer Backbone ◽  
Blend Films ◽  
The Impact

Three alternated D-π-A type 5,10-bis(triisopropylsilylethynyl)dithieno[2,3-d:2′,3′-d′]-benzo[1,2-b:4,5-b′]dithiophene (DTBDT-TIPS)-based semiconducting conjugated copolymers (CPs), PDTBDT-TIPS-DTBT-OD, PDTBDT-TIPS-DTFBT-OD, and PDTBDT-TIPS-DTNT-OD, bearing different A units, including benzothiadiazole (BT), 5,6-difluorinated-BT (FBT) and naphtho[1,2-c:5,6-c′]-bis[1,2,5]thiadiazole (NT), were designed and synthesized to investigate the impact of the variation in electron-deficient units on the properties of these photovoltaic polymers. It was exhibited that the down-shifted highest occupied molecular orbital energy level (EHOMO), the enhanced aggregation in both the chlorobenzene solution and the solid film, as well as the better molecular planarity, were achieved using methods involving fluorination and the replacement of BT with NT on the polymer backbone. The absorption profile was little changed upon fluorination; however, it was greatly broadened during replacement of BT with NT. Consequently, the optimized photovoltaic device based on the PDTBDT-TIPS-DTNT-OD exhibited synchronous enhancements in the open-circuit voltage (VOC) of 0.88 V, the short-circuit current density (JSC) of 7.21 mA cm−2, and the fill factor (FF) of 52.99%, resulting in a drastic elevation in the PCE by 129% to 3.37% compared to that of the PDTBDT-TIPS-DTBT-OD. This was triggered by PDTBDT-TIPS-DTNT-OD’s broadened absorption, deepened EHOMO, improved coplanarity, and enhanced SCLC mobility (which increased 3.9 times), as well as a favorable morphology of the active layer. Unfortunately, the corresponding PCE deteriorated after incorporating fluorine into the BT, due to the oversized aggregation and large phase separation morphology in the blend films, severely impairing its JSC. Our preliminary results demonstrated that the replacement of BT with NT in a D-π-A type polymer backbone was an effective strategy of tuning the molecular structure to achieve highly efficient polymer solar cells (PSCs).

scholarly journals Projected Performance of an InxGa1-xAs Quantum Dot Intermediate Band Solar Cell

2017 ◽  
Vol 16 (1) ◽  
pp. 47-52
Author(s):  
Sayeda Anika Amin ◽  
Md. Tanvir Hasan
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
High Efficiency ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Intermediate Band ◽  
Single Junction ◽  
Intermediate Band Solar Cell ◽  
The Impact

Quantum Dot Intermediate Band Solar Cell (QDIBSC) is one of the emerging technologies in the solar photovoltaic arena, which has immense potential to be demonstrated as a high efficiency device. For a QDIBSC to surpass the efficiency of a single junction cell, optimization of design is required. In this work, a QDIBSC model based on In0.53Ga0.47As quantum dots has been designed and evaluated with respect to dot size and spacing. The impact of carrier lifetime on short-circuit current and open-circuit voltage is studied. The conversion efficiency has been enhanced from 27.1% to 32.62% as compared to a conventional single junction cell.

scholarly journals The absorber and buffer layer thicknesses for CdTe/CdS based thin film solar cell efficiency at various operational temperatures

2021 ◽  
Vol 24 (1) ◽  
pp. 70
Author(s):  
Omar Ghanim Ghazal ◽  
Ahmed Waleed Kasim ◽  
Nabeel Zuhair Tawfeeq
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Fill Factor ◽  
Open Circuit Voltage ◽  
Structural Parameters ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Window Layer ◽  
The Impact

Cadmium telluride (CdTe)/cadmium sulfide (CdS) solar cell is a promising candidate for photovoltaic (PV) energy production, as fabrication costs are compared by silicon wafers. We include an analysis of CdTe/CdS solar cells while optimizing structural parameters. Solar cell capacitance simulator (SCAPS)-1D 3.3 software is used to analyze and develop energy-efficient. The impact of operating thermal efficiency on solar cells is highlighted in this article to explore the temperature dependence. PV parameters were calculated in the different absorber, buffer, and window layer thicknesses (CdTe, CdS, and SnO2). The effect of the thicknesses of the layers, and the fundamental characteristics of open-circuit voltage, fill factor, short circuit current, and solar energy conversion efficiency were studied. The results showed the thickness of the absorber and buffer layers could be optimized. The temperature had a major impact on the CdTe/CdS solar cells as well. The optimized solar cell has an efficiency performance of >14% when exposed to the AM1.5 G spectrum. CdTe 3000 nm, CdS 50 nm, SnO2 500 nm, and (at) T 300k were the I-V characteristics gave the best conversion open circuit voltage (Voc)=0.8317 volts, short circuit current density (Jsc)=23.15 mA/cm2, fill factor (FF)%=77.48, and efficiency (η)%=14.73. The results can be used to provide important guidance for future work on multi-junction solar cell design.

Current Transport in Cu(In,Ga)S2 Based Solar Cells with High Open Circuit Voltage - Bulk vs. Interface

2009 ◽  
Vol 1165 ◽  
Author(s):  
Saoussen Merdes ◽  
Benjamin Johnson ◽  
Rodrigo Sáez-Araoz ◽  
Ahmed Ennaoui ◽  
Joachim Klaer ◽  
...  
Keyword(s):  
Solar Cells ◽  
Photoelectron Spectroscopy ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Buffer Layers ◽  
Band Edge ◽  
Conduction Band Edge ◽  
Voltage Dependent

AbstractCu(In,Ga)S2 thin films prepared by rapid thermal sulfurization of metallic precursors yielded solar cells with efficiencies reaching 12.9% [1]. A good short circuit current density was observed together with open circuit voltages up to 850 mV. However, the fill factor was close to, but typically did not exceed 70%. In this contribution we report on the role of junction formation by chemical bath deposition on these parameters. Concentrations in the bath and deposition times were varied. A comparison is made between CdS and Zn(S,O) buffer layers. The influence of the incorporated gallium on surface properties was investigated by ultraviolet photoelectron spectroscopy (UPS) for the valence band edge and near edge X-ray absorption fine structure (NEXAFS) for the conduction band edge. Even in our best cell (13.1%) the activation energy of the saturation current is found to be still smaller than the band gap. High diode ideality factors and voltage dependent current collection prevent higher fill factors.

scholarly journals Simulation of CZTSSe single solar cells by AFORS-HET software

2020 ◽  
Vol 25 (2) ◽  
pp. 71
Author(s):  
Buthina M. Jandary ◽  
Ayed N. Saleh
Keyword(s):  
Solar Cell ◽  
Short Circuit ◽  
Cadmium Sulphide ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Absorber Layer ◽  
Buffer Layers ◽  
Maximum Efficiency ◽  
Blue Wavelength ◽  
Photovoltaic Characteristics

In this paper, this sthdy simulated photovoltaic characteristics of single heterojunction solar cell with Cu2ZnSnS4 and Cu2ZnSnSe4 absorber layer numerically using the AFORS-HET program .n-CdS/ZnO double buffer layer is used for hetrostructure interfaces with the absorber layer. The cell performance is investigated against variation of different absorption layer properties such as thickness, carrier concentration. The mixed zinc and cadmium sulphide (Cd1-X Zn X S) is hired as buffer layers and reseach of the effect  its thickness. CdS was selected a buffer because it improves the interface with absorbent CZTSSe and has a lofty  sending  in the blue wavelength. at thickness =1 μm and acceptor concentration (Na=7.9×1015 cm-3) ,a maximum efficiency  (η=11.9%)  is provided  with an open-circuit voltage (Voc=688mv), short-circuit current (Jsc=24.6 mA.cm-2) and fill factor (FF =70.8 of the CZTS solar cell, and Voc=(597 mv), Jsc= (41.7mA.cm-2), FF = (81.2 %) and η= (20.2%) of the CZTSe solar cell.   http://dx.doi.org/10.25130/tjps.25.2020.032

scholarly journals The Effect of Temperature Variance with Different Surface Shapes on Efficiency of Silicon Thin Film Solar Cell

2021 ◽  
Author(s):  
Khalil Mahmoud ElKhamisy ◽  
Hamdy AbdElhamid ◽  
salah Elagooz ◽  
El-Sayed El-Rabaie
Keyword(s):  
Solar Cell ◽  
Open Circuit Voltage ◽  
Short Circuit ◽  
Short Circuit Current ◽  
Open Circuit ◽  
Effect Of Temperature ◽  
Optical Parameters ◽  
Electrical Parameters ◽  
Silicon Thin Film ◽  
Surface Grating

Abstract In this work, the temperature effects on the PV’s electrical and optical parameters of different surface gratings are studied. A 3D simulation is introduced for studying the PV’s electrical parameters such as short circuit current, open circuit voltage and efficiency at different levels of temperature with and without surface’s gratings. We observed that the efficiency is increased for PV of surface grating by about 4.87% compared to the free grating surface’s PV. The efficiency of the PV efficiency is degraded as we increased the temperature above 300K. The solar cell efficiency of gratings free is aggressively degraded compared to the solar cell that includes gratings by about 4.89% at 360K. The electrical parameters such as the open circuit voltage and short circuit current are enhanced compared to the PV of surface grating free. Also, we observed that the triangle grating geometry of dimensions about 10×10 nm produced a higher efficiency compared to the other PV of other grating geometries of same dimensions.

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