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Doping of semiconductor matrices with Ce and Eu rare earths: investigation of electric transport and emission efficiency

Grant number: 06/05151-3
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): September 01, 2007
Effective date (End): July 31, 2009
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Nonmetallic Materials
Principal Investigator:Luis Vicente de Andrade Scalvi
Grantee:Tatiane de Fátima Pineiz
Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil


This project includes, in a first step, the production and electrical characterization of Eu doped SnO2 thin films as well as Ce-doped films, deposited by sol-gel dip-coating. In a second step, deposition of GaAs thins films, by resistive evaporation technique will be carried out, on SnO2 thin film surface. This simple device is proposed to combine rare-earth incorporation in an oxide semiconductor matrix and another layer with a high mobility semiconductor. Deposition conditions of films will be analyzed, and their electrical characteristics along with deposited electrodes will be evaluated, taking into account different rare-earth doping concentration. Measurements to be done include: resistivity as function of temperature, optical absorption, X-ray diffraction, current-voltage as function of temperature, capacitance and photoluminescence. Our laboratories present all the necessary facilities to the complete developing of such measurements. Scanning electron microscopy will also be done, in order to evaluate the interface substrate/SnO2 and SnO2/GaAs, and estimate the film thickness, because the conduction channel is a fundamental parameter in the understanding of transport properties. The main goal is to acquire scientific and technological knowledge, in order to build electroluminescent devices.

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PINEIZ, Tatiane de Fátima. Matrizes semicondutoras GaAs e Sn'X IND. 2' dopado com terras-raras Ce ou Eu: investigação do transporte elétrico. 2009. Master's Dissertation - Universidade Estadual Paulista (Unesp). Faculdade de Ciências. Bauru Bauru.

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