Photoelectrochemical solar cell properties of heteropolytungstic acid-incorporated TiO2 nanodisc thin films

Parayil, Sreenivasan Koliyat; Lee, Yu Min; Yoon, Minjoong

doi:10.1016/j.elecom.2009.04.031

Cited by 62 publications

(26 citation statements)

References 27 publications

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“…Figure 1a gives the diffraction patterns of the starting oxides (TiO 2 and TiO 2 ·HPA), which show reflections at 25.3°, 38.6°, 48.1°, 53.9°, and 55.1°characteristic for the tetragonal anatase structure [8]. Furthermore, the diffraction patterns of the titanium dioxide samples promoted by HPA showed low-intensity peaks corresponding to the crystal phase of pure PTA and PMA [9], indicating their presence in the samples obtained with the retention of Keggin structure.…”

Section: Methodsmentioning

confidence: 99%

Effect of Keggin-type heteropolyacids on electron transfer in TiO2/conjugated organic polymer (MEH-PPV) hybrid nanocomposites

Konoshchuk

Pokhodenko

2011

Theor Exp Chem

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Electron transfer occurs in composites derived from TiO 2 (TiO 2 ·HPA) and MEH-PPV from the polymer macromolecules to the inorganic matrix as indicated by the hypsochromic shift of the absorption and luminescence bands of the polymer as well as an increase in intensity of the EPR signal of the organic radical. The increased efficiency of electron transfer in going from TiO 2 /MEH-PPV to TiO 2 ·PTA/MEH-PPV and TiO 2 ·PMA/MEH-PPV may be related to an increase in this order of electron acceptor properties of the inorganic matrix due to the introduction of HPA.There has been considerable recent interest in new materials for use in various electronic and optoelectronic devices, in particular, in solar energy converters. The greatest advances have been achieved for solar cells, in which conjugated organic polymers (COP) are used as the active layer since such cells are the most inexpensive and their production is simpler than for traditional devices made using inorganic semiconductors [1].The development of polymer solar cells is based on use of the bulk p-n heterojunctions made with conjugated organic polymers (p-type semiconductors, donors) and various types of n-type semiconductors (acceptors) [1]. It is precisely the difference between the ionization potentials of the donor and electron affinity of the acceptor, which is the driving force for dissociation of the photogenerated excitons into separate charges [1,2].Studies of organic solar elements have concentrated mainly on COP/fullerene derivatives due to the high electron affinity of these derivatives [3]. However, the production of fullerenes is rather complicated and expensive. An alternative approach involves nanocrystals of inorganic n-type semiconductors with rather high electron mobility (0.01-10 cm 2 /V·s), high electron affinity, and good physical and chemical stability [1].Nanocomposites derived from conjugated organic polymers and inorganic semiconductors as the electron acceptor are hybrid bulk p-n heterojunctions. Hybrid nanocomposites hold interest since they combine the properties of inorganic semiconductor nanomaterials (high light absorption and photoconductivity) and conjugated organic polymers (low specific weight, ability to form a thin film, and a broad spectral sensitivity range). The production of such hybrid materials requires the use of such nanodimensional inorganic semiconductors as PbS, TiO 2 , CdS, CdSe, ZnS, and ZnO as acceptors and electron carriers [4]. The efficient separation and transport of charge in these hybrid nanocomposites are attributed not only to the 0040-5760/11/4703-0169

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Section: Methodsmentioning

confidence: 99%

Effect of Keggin-type heteropolyacids on electron transfer in TiO2/conjugated organic polymer (MEH-PPV) hybrid nanocomposites

Konoshchuk

Pokhodenko

2011

Theor Exp Chem

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“…To the best of our knowledge, titanium dioxide (TiO 2 ) is an important photocatalyst and has been widely investigated due to its advantages such as relatively low-cost, good chemical stability and higher oxidation potential [12][13][14][15][16][17]. Zou's group fabricates TiO 2 p-n homojunction for photoelectrochemical and photocatalytic hydrogen generation [18].…”

Section: Introductionmentioning

confidence: 99%

Syntheses of MnW12/TiO2 Microflowers and Nanorods for Photocatalytic H2 Evolution

Guo

Liu

Zhang

et al. 2021

Preprint

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MnW12/TiO2 microflower has been successfully synthesized by the one-pot method and the microflower could be converted to nanorods by thermal treatment. The hydrogen evolution efficiency of MnW12/TiO2 nanorods is higher than that of MnW12/TiO2 microflowers by means of the photocatalysis test. These results suggest that the photocatalytic property of MnW12/TiO2 could be enhanced by controlling morphology. In addition, massive control experiments have been conducted to explore the effect factors of morphologies. Therefore, the successful preparations in this work not only open up new directions for the structural diversity of isopolyoxometallate based nano/micro materials, but also provide us with an irradiative way to increase the photocatalytic performance of POM/TiO2 nano/micro composite.

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“…LSPR is induced when the frequency of the incoming photon matches with that of the oscillating electrons of the nanoparticle, leading to an increased electromagnetic field which aids in light concentration around the nanoparticle. This phenomenon of guided light, coupled with strong light scattering due to the nanoparticles, has led to tremendous research interest in recent years and several nanoparticles viz., gold (Au) [12][13][14], silver (Ag) [15][16][17], aluminium (Al) [18][19][20] etc., nanorods [21][22][23], nano discs [24,25], has been explored, leading to high efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…Titanium dioxide (TiO2) (Eg ~ 3.2 eV) and Indium oxide (In2O3) (Eg ~ 3.6 eV) are some of the most extensively used materials due to their availability, ease of handling, low cost, non-toxicity and its optoelectronic applications [30,31]. By itself TiO2 shows the properties of photovoltaic devices [8,24] however by the incident of photons and incorporation of In2O3 with TiO2, the nanostructures boost up the photoexcited e-h pairs due to several scattering processes, which lead to increase the device efficiency. Here, we have reported an efficient photovoltaic device for UV region by depositing Ag nanoparticles on the top of TiO2 and In2O3 thin films, where the Ag nanoparticles enhanced the quantum efficiency of the device by coupling incident light into guided modes through LSPR effect.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanoparticles Textured Oxide Thin Films for Surface Plasmon Enhanced Photovoltaic Properties

et al. 2021

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In this report, Ag nanoparticles were fabricated using single-step glancing angle deposition (SS-GLAD) technique upon In2O3/TiO2 thin film. Afterwards, a detailed analysis was done for the two samples such as In2O3/TiO2 thin film and In2O3/TiO2 thin film/Ag nanoparticles, to inspect the field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), ultraviolet (UV) spectroscopy and electrical properties. The reduction in bandgap energy for the samples of In2O3/TiO2 thin film/Ag nanoparticles (~4.16 eV) in comparison with the In2O3/TiO2 thin film (~4.28 eV) was due to trapped e-h recombination at the oxygen vacancies and electron transmission of Ag to the conduction band of the In2O3/TiO2 thin films. Moreover, under irradiation of photons Ag nanoparticles generated inorganic Ag-O compound attributable to the localized surface plasmon resonance (LSPR). Also, a ~90% high transmittance, ~60% and ~25% low reflectance in UV and visible region, fill factor (FF) of 53%, as well as power conversion efficiency (PCE) of 15.12% was observed for In2O3/TiO2 thin film/Ag nanoparticles than the In2O3/TiO2 thin film. Therefore, the use of Ag nanoparticles textured In2O3/TiO2 thin film based device is a promising approach for the forthcoming photovoltaic applications.

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Photoelectrochemical solar cell properties of heteropolytungstic acid-incorporated TiO2 nanodisc thin films

Cited by 62 publications

References 27 publications

Effect of Keggin-type heteropolyacids on electron transfer in TiO2/conjugated organic polymer (MEH-PPV) hybrid nanocomposites

Effect of Keggin-type heteropolyacids on electron transfer in TiO2/conjugated organic polymer (MEH-PPV) hybrid nanocomposites

Syntheses of MnW12/TiO2 Microflowers and Nanorods for Photocatalytic H2 Evolution

Silver Nanoparticles Textured Oxide Thin Films for Surface Plasmon Enhanced Photovoltaic Properties

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