Optimization of Photogenerated Charge Carrier Lifetimes in ALD Grown TiO2 for Photonic Applications.

ABSTRACT: Titanium dioxide (TiO2) thin films are widely employed for photocatalytic and photovoltaic applications where the long lifetime of charge carriers is a paramount requirement for the device efficiency. To ensure the long lifetime, a high temperature treatment is used which restricts the applicability of TiO2 in devices incorporating organic or polymer components. In this study, we exploited low temperature (100-150 °C) atomic layer deposition (ALD) of 30 nm TiO2 thin films from tetrakis(dimethylamido)titanium. The deposition was followed by a heat treatment in air to find the minimum temperature requirements for the film fabrication without compromising the carrier lifetime. Femto-to nanosecond transient absorption spectroscopy was used to determine the lifetimes, and grazing incidence X-ra

SUBMITTER: Khan R 

PROVIDER: S-EPMC7466613 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature