CD Skripsi
Pengaruh Waktu Sintesis Zno Yang Didoping Niobium Terhadap Efisiensi Dye Sensitized Solar Cells
ABSTRACT
This research was conducted to fabricate Dye Sensitized Solar Cell
(DSSC) based on ZnO nanomaterial. One of the efforts to improve DSSC's
efficiency is by doping niobium in ZnO as active materials. Niobium-doped ZnO
nanomaterials with growth time variations of 6, 8, and 10 hours have been
successfully synthesized using hydrothermal methods. Samples were
characterized using UV-Vis spectroscopy, Scanning Electron Microscope (SEM),
Energy Dispersive X-Ray (EDX) and X-Ray Diffraction (XRD). The UV-Vis
spectrum of the sample showed strong absorption observed at wavelengths range
of 250-380 nm. The sample XRD pattern at angles 2θ: 20º to 60º shows five
diffraction peaks at angles 2θ: 31.74º; 34.40º; 36.22º; 47.50º and 56.55º. Analysis
of the High Score program confirmed that the five peaks have crystal orientation
planes (100), (002), (101), (102) and (110).The SEM photos show the geometric
shape of the Nb doped ZnO nanomaterial is a nanorod with a hexagonal cross
section. The EDX spectrum of the sample shows elements of Zn, O and Nb.
DSSC was fabricated by arranging Nb doped nanomaterial as the active material,
dye N719, liquid electrolyte and platinum as catalyst on the opposite electrode
arranged like a sandwich. The results of I-V measurements under halogen
illumination with an intensity of 100 mW/cm2 resulted in the highest efficiency of
0.17% for ZnO:Nb based DSSC cells with a synthesis time of 6 hours.
Keywords: ZnO, Niobium, Doping, Characterization, DSSC.
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