What is it about?
we studied the linewidth of quasiparticles for the photo-excited carriers in rutile and anatase pseudomorphs in the non-equilibrium regimes by means of many-body perturbation theory using the so-called dynamically screened interaction (GW approximation) as a method of choice. Furthermore, the influences of the commensurate electric field on the lifetime of quasiparticles are investigated through the Stark effect
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Why is it important?
lifetimes of carriers for intraband transitions in anatase are longer than the rutile phase.Our results of inelastic scattering rates suggest that holes have the leading role in catalytic reactions than the electrons. Eventually, it is argued that applying an electric field will increase the decay rate, thus reducing the carrier lifetime and leading to loss of reactivity performance.
Perspectives
To improve the lifetimes, going beyond the electron-electron scattering, the effects of elec-tron-phonon, electron–hole, and electron-imperfections are needed.
Ali Kazempour
Payame Noor University
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This page is a summary of: Quasiparticle lifetimes in rutile and anatase TiO2: GW approximation, Physica Scripta, January 2015, Institute of Physics Publishing,
DOI: 10.1088/0031-8949/90/2/025804.
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