Photoconductive frequency-resolved spectrometer

Ioan Burda; Simion Simon; Gheorghe Cristea; Georgeta Cerbanic; Lavinia Cociu; Mihai Todica

doi:10.1117/12.378691

23 February 2000 Photoconductive frequency-resolved spectrometer

Ioan Burda, Simion Simon, Gheorghe Cristea, Georgeta Cerbanic, Lavinia Cociu, Mihai Todica

Proceedings Volume 4068, SIOEL '99: Sixth Symposium on Optoelectronics; (2000) https://doi.org/10.1117/12.378691
Event: SIOEL: Sixth Symposium of Optoelectronics, 1999, Bucharest, Romania

Abstract

The study of recombination lifetimes and kinetics is an essential part of the analysis of recombination mechanisms in semiconductors. The fundamental differences between the experimental techniques, which are used for, frequency- resolved and for time-resolved spectroscopy are present in this paper. A photoconductive frequency-resolved spectrometer (PCFRS) for carrier lifetime determination in semiconductor is described. The PCFRS uses a super-bright light emitting diode, which can be modulated directly and the sample acts as a detector. An embedded system with 68HC11 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. Typical error is less than 0.5 percent for the range of lifetimes reported.

Citation Download Citation

Ioan Burda, Simion Simon, Gheorghe Cristea, Georgeta Cerbanic, Lavinia Cociu, and Mihai Todica "Photoconductive frequency-resolved spectrometer", Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000); https://doi.org/10.1117/12.378691

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