Photoelectrical properties of anatase TiO 2 with different morphologies under Au plasmonic effect
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Photoelectrical properties of anatase TiO2 with different morphologies under Au plasmonic effect Dahyunir Dahlan1 · Nabilah Alias2 · Siti Khatijah Md Saad2 · Andhika Dwipanur Priya Utama1 · Muhamad Adam Ramli2 · Nurul Ain Abd Malek2 · Mohd Mustaqim Rosli2 · Nur Adliha Abdullah2 · Akrajas Ali Umar2 Received: 7 April 2020 / Accepted: 11 August 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract The effect of Au plasmonic on the photoelectrical properties of TiO2 nanostructure with different morphologies, i.e. nanosphericals, nanowalls, and nanorods, has been investigated. We found that the morphology strongly influences the nature of photoelectrical property modification by the Au plasmonic effect. TiO2 nanowalls with large-area (001) facet, i.e. the second highest energy facet in anatase phase, undergo the highest in the properties changes that were followed by the nanorods and nanosphericals. However, owing to the performance of DSSC device depends on the nature of photoanode attachment on the FTO substrate, the highest photovoltaic performance was given by the T iO2 nanorods, which is the strongest attachment onto the substrate surface. The present results can provide a straightforward approach for realizing high-performance DSSC device. Keywords Photoelectric properties · Shape effect · Plasmonic · DSSC · High-energy facet
1 Introduction The size, morphology and surface physics and chemistry of the nanostructure affect their electrical, optical, photoelectrical, and chemical properties [1–6]. As a result of the quantum effect at this nanoscale regime, modifying any aforementioned parameters will eventually alter the overall properties of the materials. In particular, the introduction of foreign nanosystem to the host material nanostructure gives a strong impact on the material properties, exceeding the Nabilah Alias: on study leave from Fakulti Sains and Teknologi Industri, Universiti Malaysia Pahang. * Akrajas Ali Umar [email protected] Dahyunir Dahlan [email protected] Nabilah Alias [email protected] Siti Khatijah Md Saad [email protected] 1
Department of Physics, Universitas Andalas, Limau Manis Padang, 25163 Padang, West Sumatera, Indonesia
Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
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impact produced by the morphology or dimension modification. For example, introduction of the plasmonic effect of Au, Ag or Cu nanoparticles into the vicinity of semiconducting oxide of T iO2 or ZnO has effectively shifted the optical band gap, Fermi level and surface chemistry of the materials [7–13]. These have elevated the photoactivity and catalytic properties of TiO2 or ZnO up to several orders, enhancing their performance in dye-sensitized solar cells, sensing and photocatalytic degradation of organic pollutant [14–16]. In this study, we report the role of morphology on the photoelectric properties modification by the plasmonic effect of Au nanoparticles in anatase TiO2 nanostructures. By prep
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