Tag Archives: Nanoparticle

Enhancing the Performance of Dye Senstizied Solar Cell by Incoporating Nanoparticle (Published)

This work was aimed at fabricating dye sensitized solar cell (DSSC) using chlorine e6 as sensitizer and improving the light harvesting capacity of the device by incorporating AgNPs into the configuration using SILAR method. The optical characteristics of the sensitizer, AgNPs and photoanode of the device were determined using UV-Vis spectrophotometer and morphology of the mesoporous TiO2 was determined using Scanning Electrode Microscope (SEM). The performance efficiency of the device was measured under Air Mass (AM) 1.5 at 100 mW/cm2 solar simulation standard. The optical absorption characteristics of chlorine e6 showed absorption peaks at 405, 503, 592 and 664 nm in the visible region. The maximum absorbance wavelengths (λmax) of AgNPs were observed at 450, 455, 455, and 500 nm for 3, 6, 9 and 12 SILAR cycles respectively; these observed peaks correspond to a peculiar characteristic of the AgNPs surface plasmon resonance band and the red shift observed from 450 to 500 nm was attributed to coalescence of AgNPs at higher SILAR deposition cycles. The optical absorption spectrum of the photoanode was improved when AgNPs was introduced leading to increase in the absorption intensity; the intensity increases with the increase in SILAR cycles. The fabricated DSSC (0 SILAR cycle) relatively demonstrated low efficiency of 0.28% (short circuit current density [Jsc] = 1.07 mA, open circuit voltage [Voc] = 0.46V, and fillfactor [FF] = 0.57) and was however enhanced with the incorporation of AgNPs. The cell with 6 SILAR cycles of AgNPs achieved photovoltaic efficiency of 0.43 % (Jsc = 1.39 mA, Voc = 0.50 V, and FF = 0.62) at SILAR of 12 cycles, an efficiency of 0.54% was achieved for the DSSC. Thus, the incorporation of AgNPS into the photoanode effectively enhanced the light harvesting capacity and improved the overall efficiency of the DSSC using chlorine e6 as photosensitiser

Keywords: Dye sensitized solar cell (DSSC), Nanoparticle, chlorine e6

The Structural Characterizations of Polymethel(Methaacrylate) Doped Nanoparticle Metal (Cu,Co,Fe) Thin Film by Using Nd-Yag Laser Ablation (Published)

The structural properties of PMMA doped with ( Cu , Co , Fe ) nanoparticls prepared by laser ablation were studied . In  this  research  the  polymethyl mehtacrylate  (PMMA)  was  dissolved  in chloroform   with (5%) concentration  to  form  homogeneous  solution.  PMMA  doped  with  (Cu  ,Fe ,and Co ( nanoparticale (NPs) prepared by Nd-Yag(532nm) laser ablation. The X-ray diffraction shows  that  the  structure  of  pure  polymer  film  have  an  amorphous  nature,  but PMMA  doped  with  (Cu , Co , Fe)  nanoparticles  are  polycrystalline  structure.  The  results indicate that there are a shifting and reduction in positions of peak intensity as compared with the pure (Cu , Co ,Fe) nanoparticles and there are generated some new peaks appear. The AFM examination reveal to reduction in average nanoparticle diameter after doping with NPs metal (Cu , Co , Fe ) . The FT-IR  examination appear some transmittance band after doping with NPs metal (Cu , Co , Fe ) 

Keywords: Afm, Cobalt, Copper, Crystal Size, Doping, FTIR, Iron, Nanoparticle, Polymethyl Mehtacrylate (Pmma), Xrd

The Structural Properties of Doped Cdo Thin Films with Co Prepared By Laser Ablation (Published)

The prepared samples of thin-film by laser ablation method were achieved. Powders of doped cadmium oxide with cobalt of ratios (0,1,3,5,7)wt% were mixed and then compressing by approximately 10 tons. The samples were ablated by using Neodymium-YAG laser with 1000mW and obtained the plasma plume at 0.1mbar pressure and 250oC. Results indicate by using AFM, XRD and FTIR devices that the surface roughness and the size particle decrease with increasing dopants and there are existence stretching bonds of cadmium oxide with cobalt, and have of a multi-cubical polycrystalline .The doping leads to a small decrease in the intensity of the peaks of the cadmium oxide at (200) especially at a concentration of ratio 7%, but it was obtained lowering increase at (111), However, low peaks in most of them due to doping. Absorbance infrared ray have the greatest values of pure cadmium oxide at energies (617.61) (1117.31)(1458.62)(1624.15)(3450) cm -1 and also get a reduction in the absorption peaks as a result to doping with cobalt

Keywords: AFM. Las ablation., CdO, Cobalt, Doping, FTIR, Nanoparticle, Silver, Structural, Thin Film