Adjusting the photoconductive properties of LaCoO3 thin films by epitaxial strain
Source abstract
Abstract
Abstract Epitaxial strained LaCoO3 thin films with (001) orientation were prepared on various substrates, i.e., LaAlO3, SrTiO3 and LaSrAlO4, respectively, by polymer assisted deposition. Owing to lattice mismatch, different lattice strain and tetragonal distortion of the oxygen octahedra exist in the obtained LaCoO3 films. These films exhibit excellent visible-light photoconductive performance. It reveals that the tetragonal distortion of CoO6 octahedra results in a decrease of ΔCF as well as Eg, enhancing the photoconductive performance of LaCoO3 thin films. A relatively high degree of the tetragonal distortion corresponds to higher photocurrent of the films, and the tetragonal distortion as well as photoconductive properties can be “adjusted” by epitaxial strain introduced in the LaCoO3 thin films. The adjusting method by epitaxial strain developed in this study provides a viable way for developing high-performance perovskite photoconductive semiconductor and can be extended to other optoelectronic systems.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Electronic and Structural Properties of Oxides · Magnetic and transport properties of perovskites and related materials · Perovskite Materials and Applications
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