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Sol-gel Al2O3 antireflection coatings for silicon solar cells

Dobrzański L.A., Szindler M., Szindler M.M., Hajduk C.

Archives of Materials Science and Engineering

2014

Vol. 67, nr 1

24-31

Purpose: This paper presents the results of investigations on morphology and optical properties of the prepared aluminium oxide thin films Design/methodology/approach: Thin films were prepared with use of sol-gel spin coating method. The changes of surface morphology were observed in topographic pictures performed with the atomic force microscope AFM. Obtained roughness coefficients values were generated with XEI Park Systems software. The thickness distribution were checked with spectroscopic ellipsometry with use of mapping mode. The optical reflection spectra were measured with UV-Vis spectrophotometry. Findings: Results and their analysis show that the sol-gel method allows the deposition of homogenous thin films of Al2O3 with the desired geometric characteristics and good optical properties. Practical implications: The technology of sol-gel aluminium oxide thin films deposition causes that mentioned thin films are good potential material for optics, optoelectronics and photovoltaics. Originality/value: The paper presents some results of investigations on aluminium oxide thin films prepared with sol-gel spin coating method on polished monocrystalline silicon.

Sol gel TiO2 antireflection coatings for Silicon solar cells

Dobrzański L.A., Szindler M.

Journal of Achievements in Materials and Manufacturing Engineering

2012

Vol. 52, nr 1

7--14

Purpose: The aim of this paper was to investigate changes in surface morphology and optical reflection of thin films of titanium dioxide. Thin films were prepared using sol gel spin coating method. Design/methodology/approach: The microanalysis have been investigated by the Energy-dispersive X-ray spectroscopy EDS. The changes in surface topography was observed by the atomic force microscope AFM and scanning electron microscope SEM. The results of roughness have been prepared in the software XEI Park Systems and optical reflection by the spectrometer UV/VIS. Findings: Results and their analysis allow to conclude that the titanium isopropoxide concentration in solution and spin speed, which is an important factor in spin coating technology has a significant influence on surface morphology and optical reflection of thin films titanium dioxide. Practical implications: Known sol gel titanium dioxide optical parameters and the possibility of obtaining a uniform thin films show that it can be good material for photovoltaic application. Originality/value: The paper presents some researches of titanium dioxide thin films deposited by sol gel spin coating method on monocrystalline silicon.