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Characterization of Laser-Ablated Nanostructured Al2O3/p-Si Solar Cells | ||
| Iraqi Journal of Applied Physics | ||
| Article 1, Volume 11, Issue 1, 2015, Pages 29-32 | ||
| Authors | ||
| Wafaa K. Khalef; Sarya D.M. Al-Algawi; Selma M. Al-Jawad | ||
| Abstract | ||
| This work was devoted for production of alumina (Al2O3) nanoparticles via pulsed-laser ablation technique from a solid alumina target immersed in distilled water with laser wavelength of 1064 nm. The produced NPs were characterized by UV-visible spectroscopy, atomic force microscopy (AFM), scanning electron microscopy (SEM) and Fourier-transform infrared (FTIR) measurements. FTIR spectra exhibit that bulk Al2O3 vibrational modes appear at <1000 cm-1, which indicates the formation of aluminum oxide nanoparticles. The SEM images showed that most of the obtained nanoparticles have spherical shape with a particle size of less than 1 micron. The absorption spectra of Al2O3 nanoparticles suspended in deionized water were recorded at room temperature using UV-visible spectroscopy. The absorption spectra show a strong peak at 240 nm arising from the presence of Al2O3 nanoparticles in combination with energy gap 4 eV. The n-Al2O3/p-Si solar cells were fabricated by depositing the aluminum oxide nanoparticles on p-type silicon wafers and glass substrates and then dried in an oven at 40°C for one hour to prepare and characterize heterojunction solar cells. | ||
| Keywords | ||
| alumina; Pulsed; laser ablation; Solar cells; Nanostructures | ||
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