Free electron density measurements by IR absorption in CdS

Autor:	Gene Cantwell, Michael D. Shaw, Jack L. Boone
Rok vydání:	1985
Předmět:	Electron density Absorption spectroscopy Chemistry Impurity law Scattering Analytical chemistry General Physics and Astronomy Molar absorptivity Laser Crystallographic defect Image resolution law.invention
Zdroj:	Journal of Applied Physics. 58:2296-2301
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.335949
Popis:	A contactless method for determining the spatial variation of the free carrier density in CdS is presented. The method involves the correlation of IR transmission with the free carrier density via the IR absorption coefficient. Preliminary measurements indicate a free electron density sensitivity of less than 5×1014 cm−3 and a spatial resolution which is limited only by the spot size of a CO2 (λ=10.6 μm) laser; this should be of the order of 100 μm. Experimental results indicate that the predominate scattering is due to impurity interaction at room temperature; this is indicative of the high degree of compensation in CdS.
Databáze:	OpenAIRE
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