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Surface morphology of thin films polyoxadiazoles

100%

Weszka J. , Szindler M. M. , Chwastek-Ogierman M. , Bruma M. , Jarka P. , Tomiczek B.

Journal of Achievements in Materials and Manufacturing Engineering

2011

tom Vol. 49, nr 2

224--232

Purpose: The purpose of this paper was to analyse the surface morphology of thin films polyoxadiazoles. Design/methodology/approach: SSix different polymers which belong to the group of polyoxadiazoles were dissolved in the solvent NMP. Each of these polymer was deposited on a glass substrate and a spin coating method was applied with a spin speed of 1000, 2000 and 3000 rev/min. Changes in surface topography and roughness were observed. An atomic force microscope AFM Park System has been used. Photos have been taken in noncontact mode while observing an area of 10 x 10 microns. Findings: The analysis of images has confirmed that the quality of thin films depends upon the used polymers. It was also observed that the parameters of the spin coating method have significant effect on the morphology and the surface roughness. The speed of the spin has got a strong impact on the topography of the thin films obtained. Research limitations/implications: The morphology of polyoxadiazoles thin films has been described. This paper include description how the spin speed influences the morphology of polymer thin films. In order to use a polymer thin film in photovoltaics or optoelectronics it must have a uniform thickness and a low surface roughness. Further research, in which the optical properties of thin films are investigated, is strongly recommended. Practical implications: Conductive polymers may find applications in photovoltaics or optoelectronics. It is important to study this group of material engineering and to find a new use for them. Materials from which thin films are made of will have an impact on the properties and characteristics of electronics devices in which they are be applied. Originality/value: The value of this paper is defining the optimal parameters of spin-coating technology for six polyoxadiazoles. The results allow the choosing optimal parameters of the deposition process. Spin coating is a very good method to obtain thin films which are obligated to heve the same thickness over the whole surface.

Wpływ techniki nanoszenia warstw TiO2 na parametry fotowoltaiczne krzemowych ogniw słonecznych

63%

Pich R. , Bogdanowicz K. A. , Gonciarz A. , Januszko A. , Iwan A.

tom R. 98, nr 1

177--1179

W pracy przedstawiono trzy techniki nanoszenia warstwy TiO2 jako powłoki samoczyszczącej na panelach fotowoltaicznych zainstalowanych na ekranach akustycznych, ułożonych wzdłuż linii kolejowych. Ogniwa słoneczne wraz z warstwą TiO2 poddano w warunkach laboratoryjnych badaniom wpływu naniesionych warstw na wartość parametrów fotowoltaicznych.

The paper presents three techniques of obtaining TiO2 layers as the self-cleaning film on photovoltaic panels installed on acoustic screens arranged along railway lines. The solar cells with TiO2 layers were investigated in laboratory testing of the dependence of the applied layers on photovoltaic parameters.