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Macias-Montero, Manuel
Consejo Superior de Investigaciones Científicas
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (3/3 displayed)
- 2021Carrier extraction from metallic perovskite oxide nanoparticlescitations
- 2020Tuning the Bandgap Character of Quantum‐Confined Si–Sn Alloyed Nanocrystalscitations
- 2020Role of the La/K Compositional Ratio in the Properties of Waveguides Written by Fs-Laser Induced Element Redistribution in Phosphate-Based Glassescitations
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article
Carrier extraction from metallic perovskite oxide nanoparticles
Abstract
We observe the extraction of carriers excited between two types of bands in the perovskite oxide, Sr-deficient strontium niobate (Sr<sub>0.9</sub>NbO<sub>3</sub>). Sr<sub>0.9</sub>NbO<sub>3</sub> exhibits metallic behaviour and high conductivity, whilst also displaying broad absorption across the ultraviolet, visible, and near-infrared spectral regions, making it an attractive material for solar energy conversion. Furthermore, the optoelectronic properties of strontium niobate can easily be tuned by varying the Sr fraction or through doping. Sr-deficient strontium niobate exhibits a split conduction band, which enables two types of optical transitions: intraband and interband. However, whether such carriers can be extracted from an unusual material as such remains unproven. In this report, we have overcome the immense challenge of photocarrier extraction by fabricating an extremely thin absorber layer of Sr<sub>0.9</sub>NbO<sub>3</sub> nanoparticles. These findings open up great opportunities to harvest a very broad solar spectral absorption range with reduced recombination losses.