Comparing Photoelectrochemical Water Oxidation, Recombination Kinetics and Charge Trapping in the Three Polymorphs of TiO

Overview

Journal Sci Rep

Specialty Science

Date 2017 Jun 9

PMID 28592816

Citations 6

Authors

Benjamin Moss

Kee Kean Lim

Alessandro Beltram

Savio Moniz

Junwang Tang

Paolo Fornasiero

Piers Barnes

James Durrant

Andreas Kafizas

Affiliations

Soon will be listed here.

Abstract

In this article we present the first comparative study of the transient decay dynamics of photo-generated charges for the three polymorphs of TiO. To our knowledge, this is the first such study of the brookite phase of TiO over timescales relevant to the kinetics of water splitting. We find that the behavior of brookite, both in the dynamics of relaxation of photo-generated charges and in energetic distribution, is similar to the anatase phase of TiO. Moreover, links between the rate of recombination of charge carriers, their energetic distribution and the mode of transport are made in light of our findings and used to account for the differences in water splitting efficiency observed across the three polymorphs.

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