A spectroscopic method for determining the actual concentration of active iron atoms in bulk InP is presented. It is based on the evaluation of the absorption coefficient in the 6000-10,600 wavenumber range. It is seen that the absorption coefficient is proportional to the Fe density. The absorbance value in spectral regions where the absorption is nil depends on the presence of precipitates. The bandgap width is found to be dependent on the concentration of iron. From this experimental evidence an estimate of the ratio [Fe2+]/[Fe3+] is derived.
Determination of iron content in bulk semi-insulating InP by infrared absorption spectroscopy / Fornari, R.; Kumar, J.; Curti, M.; Mignoni, G.. - (1990), pp. 347-352. (Intervento presentato al convegno 6th Intern. Conference on Semi-Insulating III-V Materials tenutosi a Toronto, Ont, Canada nel 1990).
Determination of iron content in bulk semi-insulating InP by infrared absorption spectroscopy
R. Fornari
;
1990-01-01
Abstract
A spectroscopic method for determining the actual concentration of active iron atoms in bulk InP is presented. It is based on the evaluation of the absorption coefficient in the 6000-10,600 wavenumber range. It is seen that the absorption coefficient is proportional to the Fe density. The absorbance value in spectral regions where the absorption is nil depends on the presence of precipitates. The bandgap width is found to be dependent on the concentration of iron. From this experimental evidence an estimate of the ratio [Fe2+]/[Fe3+] is derived.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
