Modelling of changes in the resistivity of semi-insulating materials

• Autorzy: Suproniuk Marek

Identyfikatory

DOI

10.24425/mms.2021.137129

• Języki publikacji: EN

Abstrakty

EN

Electrical properties of semiconductor materials depend on their defect structure. Point defects, impurities or admixture contained in a semiconductor material, strongly affect its properties and determine the performance parameters of devices made on its basis. The results of the currently used methods of examining the defect structure of semiconductor material are imprecise due to solution of ill-posed equations. These methods do not allow for determination of concentration of the defect centers examined. Improving the resolution of the obtained parameters of defect centers, determining their concentration and studying changes in the resistivity of semi-insulating materials can be carried out, among others, by modelling changes in the concentration of carriers in the conduction and valence bands. This method allows to determine how charge compensation in the material affects the changes in its resistivity. Calculations based on the Fermi-Dirac statistics can complement the experiment and serve as a prediction tool for identifying and characterizing defect centers. Using the material models (GaP, 4H-SiC) presented in the article, it is possible to calculate their resistivity for various concentrations of defect centers in the temperature range assumed by the experimenter. The models of semi-insulating materials presented in the article were built on the basis of results of testing parameters of defect centers with high-resolution photoinduced transient spectroscopy (HRPITS). The current research will allow the use of modelling to determine optimal parameters of semi-insulating semiconductor materials for use in photoconductive semiconductor switches (PCSS).

Słowa kluczowe

EN

resistivity; semiconductor; gallium phosphide; silicon carbide

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2021
• Tom: Vol. 28, nr 3
• Strony: 581--592
• Opis fizyczny: Bibliogr. 24 poz., rys., tab., wykr., wzory

Twórcy

autor

Suproniuk Marek

• Military University of Technology, Faculty of Electronics, Institute of Electronic Systems, gen. S. Kaliskiego 2, Warsaw

Bibliografia

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Uwagi

1. The author would like to thank Prof. Paweł Kaminski from the Łukasiewicz Research Network - Institute of Microelectronics and Photonics in Warsaw, Poland, for the data from the performed measurements without which the verification of the simulation model would not have been possible.

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).