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Charge Separation Kinetics in the ?-Cr2O3/?-Fe2O3 System


EMSL Project ID
8990

Abstract

Thin nano-films of the ?-Cr2O3/?-Fe2O3 system are currently being grown in EMSL. As a result of their nanometer scale dimensions, these films have potential as high-efficiency photoinduced charge transfer systems for photovoltaic materials and for surface processes requiring oxidation or reduction. The efficiencies of these systems are limited by the degree to which the photoinduced charge carriers recombine before they can be involved in useful chemical or physical processes. We will use transient reflectivity and transient absorption spectroscopies to study the kinetics of charge recombination as a function of film thickness in order to identify the conditions that minimize charge recombination efficiencies. The amplified femtosecond Ti:Sapphire laser system in EMSL 1209 will be used to carry out these measurements.

Project Details

Project type
Exploratory Research
Start Date
2004-06-14
End Date
2005-06-20
Status
Closed

Team

Principal Investigator

David Laman
Institution
Central Washington University