Polyvinyl alcohol/beetroot dye film as light absorbing material in solar cell

2020 ◽  
Author(s):  
Kumari Nisha S.
Keyword(s):  
Solar Cell ◽  
Polyvinyl Alcohol ◽  
Absorbing Material

scholarly journals Inexpensive solar cell using TiO2/coffee composite as photon absorbing material

2020 ◽  
Vol 833 ◽  
pp. 012089
Author(s):  
D Y Rahman ◽  
F D Utami ◽  
D O Margaretta ◽  
N Amalia ◽  
R Sulistyowati ◽  
...  
Keyword(s):  
Solar Cell ◽  
Absorbing Material

scholarly journals Natural Pigment –Poly Vinyl Alcohol Nano composites Thin Films for Solar Cell

2020 ◽  
Vol 17 (3) ◽  
pp. 0832
Author(s):  
Hanaa J. Alesa ◽  
Balqees M. Aldabbag ◽  
Rana M. Salih
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Contact Angle ◽  
Dielectric Constant ◽  
Optical Properties ◽  
Solar Cell ◽  
Melting Point ◽  
Polyvinyl Alcohol ◽  
Energy Gap ◽  
Natural Pigment

Solar cells thin films were prepared using polyvinyl alcohol (PVA) as a thin film, with extract of natural pigment from local flower. A concentration of 0.1g/ml of polyvinyl alcohol solution in water was prepared for four samples, with various concentrations of plant pigment (0, 15, 25 and 50) % added to each of the four solutions separately for preparing (PVA with low concentrated dye , PVA with medium concentrated dye and PVA with high concentrated dye ) thin films respectively . Ultraviolet absorption regions were obtained by computerized UV-Visible (CECIL 2700). Optical properties including (absorbance, reflectance, absorption coefficient, energy gap and dielectric constant) via UV- Vis were tested, too.  Fourier transform infrared (FTIR) spectrophotometer was employed to test the samples. Thermal analysis of thin films, including melting point (Tm), onset degree, endset degree, and crystallinity% were tested by differential scanning calorimeter (DSC). Three dimensional morphologies of thin films were inspected by atomic force microscopy (ATM). Contact angle also was tested as an index to hydrophilicity. Results proved that the ultraviolet and FTIR absorption increase after adding the natural pigment to PVA thin film, as well as it increases with increasing concentration of natural pigment. DSC analysis revealed an increase of PVA melting point when adding 15% concentration and it decreases with a 50% concentration of pigment. AFM results show an increase in surface roughness, hence the surface bearing index of PVA thin films is inversely proportional to pigment concentration. Contact angle decreases from 46.5° for pure PVA thin film to 44. 8°, 42. 6° and 35.2° after adding (15, 25, and 50)%  concentration of natural dye respectively. Optical properties were enhanced by adding the natural dye, hence energy gap decreased from 3 eV for pure PVA to 2.3 eV for the PVA with a high concentrate dye. Dielectric constant increased with increasing concentration of dye, which leads to high polarization of solar cell.                                                                        

scholarly journals Improving the efficiency of crystalline silicon solar cell through regulating their temperature using thin films of polyvinyl alcohol

2021 ◽  
Vol 286 ◽  
pp. 02012
Author(s):  
Ali Kadhim Naser ◽  
Dhafer Manea Hachim ◽  
Qahtan A Abed
Keyword(s):  
Thin Films ◽  
Solar Cell ◽  
Polyvinyl Alcohol ◽  
Crystalline Silicon ◽  
Dip Coating ◽  
Maximum Temperature ◽  
Maximum Efficiency ◽  
Crystalline Silicon Solar Cell ◽  
Cell Parameters ◽  
Pv Module

Rising temperatures significantly affect the PV module, decreasing its voltage and lowering output power. Furthermore, temperature rises have been linked to several PV module failures or degradation modes. The purpose of this study analyzes polyvinyl alcohol PVA on crystalline silicon solar cells as a thermal insulation thin film. PVA thin films were prepared by dip-coating technique with a thickness of 1.15μm. The films exhibit suitable solar cell temperature controlling though it's an effect on masking the ultraviolet wavelength. The maximum temperature variation on the coating solar cell's surface was 4.5 °C as a comparison to a bare solar cell with irradiate exposure time 1800sec, and maximum efficiency obtained 18.99% in which Voc = 0.566 v and Isc = 330.2 mA when compared with bare solar cell 15.07% with benefit efficiency +3.92%. The concentrations of the polyvinyl alcohol influences on thin films and their effect on solar cell parameters are discussed.

scholarly journals Enhanced Electrical Properties of Crystalline Silicon Solar Cells via Nano-Composite Polyvinyl-Alcohol/Titanium Dioxide

2021 ◽  
Vol 16 (5) ◽  
pp. 557-564
Author(s):  
Ali Kadhim Naser ◽  
Dhafer Manea H. Al-Shamkhee ◽  
Qahtan Adnan Abed
Keyword(s):  
Titanium Dioxide ◽  
Solar Cells ◽  
Solar Cell ◽  
Polyvinyl Alcohol ◽  
Silicon Solar Cells ◽  
Coating Film ◽  
Solar Cell Efficiency ◽  
Cell Efficiency ◽  
Energy Bandgap ◽  
The Impact

Reflection loss and solar cell temperature both have a significant impact on solar cell efficiency and, consequently, on power generation. Herein, the aim is to investigate into the impact of Nanocomposite Titanium Dioxide (TiO2)/Polyvinyl Alcohol (PVA) on polycrystalline silicon solar cells. The solvent casting method is employed to prepare nanocomposite TiO2/PVA for deposition on the front side of the solar cell. The Tauc plot is used to investigate the influence of TiO2 nanoparticle concentration (10-20nm) on the energy bandgap of a nanocomposite. To test the optical properties of the solar cell after depositing the Nanocomposite coating film and to confirm the suspension of TiO2 in PVA and construct a Nanocomposite, an ultraviolet-visible spectrometer and a Fourier transform infrared spectrometer are provided. The results show that increasing the TiO2 in the TiO2/PVA Nanocomposite increases the energy bandgap. The Ultraviolet-Visible spectrometer observes that the Nanocomposite films absorb the Ultraviolet wavelength and transmittance at the visible wavelength. Finally, it found the lowest reflection obtained was 3.9% for 0.2wt% TiO2 in TiO2/PVA nanocomposite and the enhancement of the solar cell efficiency was (+2.3%).

scholarly journals Low-Cost CuIn1−xGaxSe2 Ultra-Thin Hole-Transporting Material Layer for Perovskite/CIGSe Heterojunction Solar Cells

2019 ◽  
Vol 9 (4) ◽  
pp. 719 ◽  
Author(s):  
Liann-Be Chang ◽  
Chzu-Chiang Tseng ◽  
Gwomei Wu ◽  
Wu-Shiung Feng ◽  
Ming-Jer Jeng ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Ohmic Contacts ◽  
Short Circuit ◽  
Optical Power ◽  
Short Circuit Current ◽  
Oxide Glass ◽  
Hole Transporting ◽  
Absorbing Material ◽  
Hole Transporting Material

This paper presents a new type of solar cellwith enhanced optical-current characteristics using an ultra-thin CuIn1−xGaxSe2 hole-transporting material (HTM) layer (<400 nm). The HTM layer was between a bi-layer Mo metal-electrode and a CH3NH3PbI3 (MAPbI3) perovskite active absorbing material. It promoted carrier transportand led to an improved device with good ohmic-contacts. The solar cell was prepared as a bi-layer Mo/CuIn1−xGaxSe2/perovskite/C60/Ag multilayer of nano-structures on an FTO (fluorine-doped tin oxide) glass substrate. The ultra-thin CuIn1−xGaxSe2 HTM layers were annealed at various temperatures of 400, 500, and 600 °C. Scanning electron microscopy studies revealed that the nano-crystal grain size of CuIn1−xGaxSe2 increased with the annealing temperature. The solar cell results show an improved optical power conversion efficiency at ~14.2%. The application of the CuIn1−xGaxSe2 layer with the perovskite absorbing material could be used for designing solar cells with a reduced HTM thickness. The CuIn1−xGaxSe2 HTM has been evidenced to maintain a properopen circuit voltage, short-circuit current density and photovoltaic stability.

Hematite Fe2O3 Nanoparticles Incorporated Polyvinyl Alcohol Based Polymer Electrolytes for Dye-Sensitized Solar Cells

2015 ◽  
Vol 832 ◽  
pp. 72-83 ◽  
Author(s):  
R.A. Senthil ◽  
J. Theerthagiri ◽  
J. Madhavan
Keyword(s):  
Solar Cell ◽  
Ionic Conductivity ◽  
Polyvinyl Alcohol ◽  
Polymer Electrolyte ◽  
Polymer Electrolytes ◽  
Ac Impedance ◽  
Dye Sensitized Solar Cell ◽  
Solar Cell Application ◽  
Dye Sensitized ◽  
Ac Impedance Analysis

Influence of hematite iron oxide nanoparticles (α-Fe2O3 NPs) on ionic conductivity of polyvinyl alcohol/KI/I2 (PVA/KI/I2) polymer electrolytes was investigated in this work. The pure and different weight percentage (wt %) ratios (2, 3, 4 and 5 % with respect to PVA) of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolyte films were prepared by solution casting method using DMSO as solvent. The prepared polymer electrolyte films were characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffractometer (XRD) and alternating current (AC)-impedance analysis. The AC-impedance studies revealed a significant increase in the ionic conductivity of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolytes than compared to pure PVA/KI/I2. This incorporated polymer electrolytes reduces the crystallinity of the polymer and enhance the mobility of I-/I3- redox couple, thereby increasing the ionic conductivity of polymer electrolytes. The highest ionic conductivity of 1.167 × 10-4 Scm-1 was observed for 4 wt % of α-Fe2O3 NPs incorporated PVA/KI/I2 polymer electrolyte. Also, the dye sensitized solar cell (DSSC) fabricated with this electrolyte showed an enhanced power conversion efficiency of 3.62 % than that of pure PVA/KI/I2 electrolyte (1.51 %). Thus, the synthesized α-Fe2O3 NPs added polymer electrolyte can be serve as a suitable material for dye sensitized solar cell application studies.

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