Bulg. J. Phys. vol.27 no.S3 (2000), pp. 120-123



Photoconductive Frequency-Resolved Spectrometer with M68HC11 Microcontroller

I. Burda, S. Simon, M. Todica, S.D. Anghel, G. Cerbanic
Abstract. The study of recombination lifetimes and kinetics is an essential part of the analysis of the recombination mechanisms in semiconductors. A photoconductive frequency-resolved spectrometer (PCFRS) for carrier lifetime determination in semiconductor is described. An embedded system with M68HC 11 microcontroller ensures all basic functions of this spectrometer. This PCFRS is designed for a narrow lifetimes range, the operation range is between 0.159 s and 0.159 ms and typical error is less than 0.5% for the range of lifetimes reported.

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