Abstract
The thermodynamic properties of the molten M-As2Te3 (M:Tl,Bi) systems have been measured by means of the electromotive force (EMF) method. The partial molar entropy and enthalpy of Tl in the molten Tl-As2Te3 system show a very drastic change at a composition of 54.54 at.% Tl, where the system shows a p-n transition. On the other hand, the activities of Bi show no such drastic change in the molten Bi-As2Te3 system, where the p-n transition and subsequent metallization occur at a much lower Bi concentration. However, the EMF data for the Bi-containing system were not accurate enough to separate the entropy and enthalpy contributions from the total free energy change. The present results indicate that strong interactions between Tl and Te in the Tl-As2Te3 system are responsible for the preservation of p-type semiconduction in the molten state.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.