The effect of ethylene glycol/citric acid molar ratio in the initial precursor of TiO2 nanoparticle paste synthesized by a polymerizable complex method on the photovoltaic properties of dye-sensitized solar cells

Mashreghi, Ali; Davoudi, Farideh

doi:10.1016/j.mssp.2014.11.001

Cited by 16 publications

(6 citation statements)

References 29 publications

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“…In the Pechini synthesis, the viscosity of the gelled precursor has a direct influence on the homogeneity of the end products [34]. Therefore, numerous investigations have attempted to identify the critical factors governing the gel viscosity [34,35,36,37]. Their results highlighted the crucial role played by the citric acid to ethylene glycol molar (CA:EG) ratio and the citric acid to metal molar (CA:M) ratio.…”

Section: Resultsmentioning

confidence: 99%

Highly Efficient Wideband Microwave Absorbers Based on Zero-Valent Fe@γ-Fe2O3 and Fe/Co/Ni Carbon-Protected Alloy Nanoparticles Supported on Reduced Graphene Oxide

et al. 2019

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Electronic systems and telecommunication devices based on low-power microwaves, ranging from 2 to 40 GHz, have massively developed in the last decades. Their extensive use has contributed to the emergence of diverse electromagnetic interference (EMI) phenomena. Consequently, EMI shielding has become a ubiquitous necessity and, in certain countries, a legal requirement. Broadband absorption is considered the only convincing EMI shielding solution when the complete disappearance of the unwanted microwave is required. In this study, a new type of microwave absorber materials (MAMs) based on reduced graphene oxide (rGO) decorated with zero-valent Fe@γ-Fe2O3 and Fe/Co/Ni carbon-protected alloy nanoparticles (NPs) were synthesized using the Pechini sol-gel method. Synthetic parameters were varied to determine their influence on the deposited NPs size and spatial distribution. The deposited superparamagnetic nanoparticles were found to induce a ferromagnetic resonance (FMR) absorption process in all cases. Furthermore, a direct relationship between the nanocomposites’ natural FMR frequency and their composition-dependent saturation magnetization (Ms) was established. Finally, the microwave absorption efficiency (0.4 MHz to 20 GHz) of these new materials was found to range from 60% to 100%, depending on the nature of the metallic particles grafted onto rGO.

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Section: Resultsmentioning

confidence: 99%

Highly Efficient Wideband Microwave Absorbers Based on Zero-Valent Fe@γ-Fe2O3 and Fe/Co/Ni Carbon-Protected Alloy Nanoparticles Supported on Reduced Graphene Oxide

et al. 2019

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“…Ti-sol was synthesized from precursor with composition of titanium tetraisopropoxide: citric acid: ethylene glycol¼ 1:3:12. More details of synthesis procedure were given in our previous works [21][22][23] Parameter X was defined as I 2 to LiI molar ratio in electrolyte. In this work, X varied from 0.005 to 2 (X¼ 0.005, 0.008, 0.02, 0.03, 0.1, 0.3, 1, 2).…”

Section: Experimental Methodsmentioning

confidence: 99%

Investigating the electrolyte iodine concentration effect on photovoltaic properties of dye-sensitized solar cells by electrochemical impedance spectroscopy

Moghadam

Mashreghi

2015

Materials Science in Semiconductor Processing

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“…The reagents commonly used in applying this method are citric acid (CA) and ethylene glycol (EG) [ 10 , 12 ]. Pechini reported 4:1 as the optimal EG:CA molar ratio [ 11 ]; however, these synthesis parameters have been varied to study the effect on the morphology and thus the change in the optical and electronic properties of oxides such as TiO 2 [ 13 ], CuO [ 14 ] and ZnO [ 15 ]. The literature indicates that the structural characteristics of the semiconductor oxides can be controlled through the parameters of synthesis, depending on the technological applications desired.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ethylene Glycol: Citric Acid Molar Ratio and pH on the Morphology, Vibrational, Optical and Electronic Properties of TiO2 and CuO Powders Synthesized by Pechini Method

et al. 2022

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High-purity TiO2 and CuO powders were synthesized by the Pechini method, an inexpensive and easy-to-implement procedure to synthetize metal oxides. The variables of synthesis were the ethylene glycol:citric acid molar ratio and the pH. High reproducibility of the anatase and tenorite phase was obtained for all synthesis routes. The degree of purity of the powders was confirmed by XRD, FTIR, UV-Vis absorption and XPS spectra. SEM and TEM images revealed the powders are composed of micrometer grains that can have a spherical shape (only in the TiO2) or formed by a non-compacted nanocrystalline conglomerate. FTIR spectra only displayed vibrational modes associating TiO2 and CuO with nanoparticle behavior. UV-Vis absorption spectra revealed the values of maximum absorbance percentage of both systems are reached in the ultraviolet region, with percentages above 83% throughout the entire visible light spectrum for the CuO system, a relevant result for solar cell applications. Finally, XPS experiments allow the observation of the valence bands and the calculation of the energy bands of all oxides.

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The effect of ethylene glycol/citric acid molar ratio in the initial precursor of TiO2 nanoparticle paste synthesized by a polymerizable complex method on the photovoltaic properties of dye-sensitized solar cells

Cited by 16 publications

References 29 publications

Highly Efficient Wideband Microwave Absorbers Based on Zero-Valent Fe@γ-Fe2O3 and Fe/Co/Ni Carbon-Protected Alloy Nanoparticles Supported on Reduced Graphene Oxide

Highly Efficient Wideband Microwave Absorbers Based on Zero-Valent Fe@γ-Fe2O3 and Fe/Co/Ni Carbon-Protected Alloy Nanoparticles Supported on Reduced Graphene Oxide

Investigating the electrolyte iodine concentration effect on photovoltaic properties of dye-sensitized solar cells by electrochemical impedance spectroscopy

Effect of Ethylene Glycol: Citric Acid Molar Ratio and pH on the Morphology, Vibrational, Optical and Electronic Properties of TiO2 and CuO Powders Synthesized by Pechini Method

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