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  • Author: E. Płaczek-Popko x
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V. V. Kusnezh, H. A. Il’Chuk, F. I. Tsyupko, E. Płaczek-Popko, K. Gwóźdź and P. Biegański

Abstract

Gold nanoparticle array on pretreated glass substrates was fabricated by chemical surface growth from the AuCl3, CH2O and Na2CO3 components in aqueous solutions mixture. Transmission, absorption and reflectivity spectra were measured with an UV-Vis spectrophotometer. A change in plasmon maximum absorption position depending on the growth conditions was investigated. The surface morphology was studied by atomic force microscopy. The statistical analysis of the heights, particles diameter and image cross-sections was carried out by scanning probe microscopy methods and the Au NPs size dependence on the growth time was experimentally determined. The results of this paper will contribute to the optimization of plasmonic CdS/CdTe solar cell.

Open access

K. Gwóźdź, E. Płaczek-Popko, Z. Gumienny, E. Zielony, R. Pietruszka, B. S. Witkowski, Ł. Wachnicki, S. Gierałtowska, M. Godlewski and L. B. Chang

Abstract

Our studies focus on test structures for photovoltaic applications based on zinc oxide nanorods grown using a low-temperature hydrothermal method on a p-type silicon substrate. The nanorods were covered with silver nanoparticles of two diameters – 20–30 nm and 50–60 nm – using a sputtering method. Scanning electron microscopy (SEM) micrographs showed that the deposited nanoparticles had the same diameters. The densities of the nanorods were obtained by means of atomic force microscope (AFM) images. SEM images and Raman spectroscopy confirmed the hexagonal wurtzite structure of the nanorods. Photoluminescence measurements proved the good quality of the samples. Afterwards an atomic layer deposition (ALD) method was used to grow ZnO:Al (AZO) layer on top of the nanorods as a transparent electrode and ohmic Au contacts were deposited onto the silicon substrate. For the solar cells prepared in that manner the current-voltage (I-V) characteristics before and after the illumination were measured and their basic performance parameters were determined. It was found that the spectral characteristics of a quantum efficiency exhibit an increase for short wavelengths and this behavior has been linked with the plasmonic effect.