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Proceedings Paper

Photoconductive frequency-resolved spectrometer
Author(s): Ioan Burda; Simion Simon; Gheorghe Cristea; Georgeta Cerbanic; Lavinia Cociu; Mihai Todica
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Paper 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.

Paper Details

Date Published: 23 February 2000
PDF: 6 pages
Proc. SPIE 4068, SIOEL '99: Sixth Symposium on Optoelectronics, (23 February 2000); doi: 10.1117/12.378691
Show Author Affiliations
Ioan Burda, Babes-Bolyai Univ. (Romania)
Simion Simon, Babes-Bolyai Univ. (Romania)
Gheorghe Cristea, Babes-Bolyai Univ. (Romania)
Georgeta Cerbanic, Babes-Bolyai Univ. (Romania)
Lavinia Cociu, Babes-Bolyai Univ. (Romania)
Mihai Todica, Babes-Bolyai Univ. (Romania)


Published in SPIE Proceedings Vol. 4068:
SIOEL '99: Sixth Symposium on Optoelectronics
Teodor Necsoiu; Maria Robu; Dan C. Dumitras, Editor(s)

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