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In this paper results of modulated photothermal radiometry (PTR) measurements and analyses of a series of phosphorus doped silicon samples are presented and discussed. Phosphorus concentration in the investigated samples changed from 4. 3 10 ^11 cm ^-3 to 1. 9 10 ^18 cm ^-3. It corresponded to the specific resistance changes of the samples from 10000 cm to 0. 16 cm respectively. The goal of the study was to investigate the possibility of determination of the influence of the doping level of silicon on its optical absorption coefficient in the infrared region, minority carrier lifetime and the thermal parameters measured with the nondestructive PTR method.
Chrobak et al. (2024) studied this question.