Dataset Information

Plasmon-Enhanced Photocurrent using Gold Nanoparticles on a Three-Dimensional TiO₂ Nanowire-Web Electrode.

ABSTRACT: In this study, an anatase/rutile mixed-phase titanium dioxide (TiO₂) hierarchical network deposited with Au nanoparticles (Au/TiO₂ ARHN) was synthesized using a facile hydrothermal method followed by a simple calcination step. Such a unique structure was designed for improving the light harvest, charge transportation/separation, and the performance of photo-electro-chemical (PEC) cells. The properties of the as-synthesized Au/TiO₂ ARHN in PEC cells were investigated by electrochemical measurements using a three-electrode system in a 1?M NaOH electrolyte. Remarkably, a 4.5-folds enhancement of the photocurrent for Au/TiO₂ ARHN was observed as compared to that for TiO₂ nanowire (NW), under AM1.5G solar illumination, suggesting its potential application in PEC cells. A mechanism has been proposed to explain the high photocurrent of Au/TiO₂ ARHN in PEC water splitting.

SUBMITTER: Yen YC

PROVIDER: S-EPMC5301249 | biostudies-literature | 2017 Feb

REPOSITORIES: biostudies-literature

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Plasmon-Enhanced Photocurrent using Gold Nanoparticles on a Three-Dimensional TiO2 Nanowire-Web Electrode.

Yen Yin-Cheng YC Chen Jau-An JA Ou Sheng S Chen Yi-Shin YS Lin Kuan-Jiuh KJ

Scientific reports 20170210

In this study, an anatase/rutile mixed-phase titanium dioxide (TiO2) hierarchical network deposited with Au nanoparticles (Au/TiO2 ARHN) was synthesized using a facile hydrothermal method followed by a simple calcination step. Such a unique structure was designed for improving the light harvest, charge transportation/separation, and the performance of photo-electro-chemical (PEC) cells. The properties of the as-synthesized Au/TiO2 ARHN in PEC cells were investiga ...[more]

PMID: 28186170

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Project description:The exceptional property of plasmonic materials to localize light into sub-wavelength regimes has significant importance in various applications, especially in photovoltaics. In this study, we report the localized surface plasmon-enhanced perovskite solar cell (PSC) performance of plasmonic gold nanoparticles (AuNPs) embedded into a titanium oxide (TiO2) microdot array (MDA), which was deposited using the inkjet printing technique. The X-ray (XRD) analysis of MAPI (methyl ammonium lead iodide) perovskite films deposited on glass substrates with and without MDA revealed no destructive effect of MDA on the perovskite structure. Moreover, a 12% increase in the crystallite size of perovskite with MDA was registered. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) techniques revealed the morphology of the TiO2_MDA and TiO2-AuNPs_MDA. The finite-difference time-domain (FDTD) simulation was employed to evaluate the absorption cross-sections and local field enhancement of AuNPs in the TiO2 and TiO2/MAPI surrounding media. Reflectance UV-Vis spectra of the samples comprising glass/TiO2 ETL/TiO2_MDA (ETL-an electron transport layer) with and without AuNPs in TiO2_MDA were studied, and the band gap (Eg) values of MAPI have been calculated using the Kubelka-Munk equation. The MDA introduction did not influence the band gap value, which remained at ~1.6 eV for all the samples. The photovoltaic performance of the fabricated PSC with and without MDA and the corresponding key parameters of the solar cells have also been studied and discussed in detail. The findings indicated a significant power conversion efficiency improvement of over 47% in the PSCs with the introduction of the TiO2-AuNPs_MDA on the ETL/MAPI interface compared to the reference device. Our study demonstrates the significant enhancement achieved in halide PSC by utilizing AuNPs within a TiO2_MDA. This approach holds great promise for advancing the efficiency and performance of photovoltaic devices.

Dataset Information

Plasmon-Enhanced Photocurrent using Gold Nanoparticles on a Three-Dimensional TiO₂ Nanowire-Web Electrode.

Publications

Plasmon-Enhanced Photocurrent using Gold Nanoparticles on a Three-Dimensional TiO<sub>2</sub> Nanowire-Web Electrode.

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