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Surface damage assessment by analysis of electrical resistance changes in graphite-based sensing skin

Stepnowski Marek, Janczak Daniel, Jakubowska Małgorzata, Pyrzanowski Paweł

Metrology and Measurement Systems

2022

Vol. 29, nr 2

347--360

The article presents the method of identifying surface damage by measuring changes in resistance in graphite-based sensing skin. The research focused on analysis of conductivity anomalies caused by surface damage. Sensitivity maps obtained with Finite Element Method (FEM) in conjunction with the analytical damage model were used to build the coating evaluation algorithm. The experiment confirmed the ability of this method to identify a single elliptical-shape damage. Eight electrodes were enough to locate the damage that covered about 0.1‰ of the examined area. The proposed algorithm can prove useful in simple applications for surface condition monitoring. It can be implemented wherever it is possible to apply a thin layer of conductor to a non-conductive surface.

Analysis of back contact layers for flexible CdTe/CdS photovoltaic structures

Znajdek Katarzyna, Sibiński Maciej, Kubiak Andrzej, Ruta Łukasz, Lisik Zbigniew, Janczak Daniel

Opto-Electronics Review

2019

Vol. 27, No. 1

32--38

The article shows the comprehensive results of the experiments, conducted in order to select the appropriate metal layers, for back absorber contacts, to apply in flexible, thin-film photovoltaic cells based on cadmium telluride. Preliminary selection of investigated materials was made on the basis of general knowledge and physical data. Deposition techniques, as well as layer parameters, were adjusted to the specific flexible solar cell’s needs. Selected metal layers were deposited either by physical vapour deposition (PVD) or screen-printing method (SP) and tested in terms of their flexibility, thermal resistance, as well as adhesion to CdTe layer. Practical verification of selected configurations is proved by the complete construction of the device.