Research Papers/Topics in Material Science

Optoelectronic property refinement of FASnI3 films for photovoltaic application

Abstract: Tin (Sn) is a promising substitute for lead (Pb) in organic–inorganic hybrid halide perovskite-photovoltaic devices, but it is prone to delivering low power conversion efficiencies (PCEs) due to the poor quality of Sn-perovskite films. In this work, anilinium hypophosphite (AHP) co-additive is used to fabricate high-quality FASnI3 (FA+: formamidinium) perovskite films with suppressed phase-segregation and prolonged charge carrier lifetime. Perovskite films containing 0.05 M AHP a...

Production and Evaluation of the Impact Strength of Snail Shell Reinforced Epoxy Composite

Particulate-filled polymer composites are becoming quite attractive because of their low cost and wide application. Nowadays shells of arthropods and mollusks are widely used as reinforced materials due to their availability and impact mechanical properties. This study focused on theproduction and evaluation of impact strength of snail shell reinforced epoxy composite and as well given concrete information and recommendation on usage with respect to appropriate filler concentration an...

Synthesis and Characterization of Ti–Fe Oxide Nanomaterials: Adsorption–Degradation of Methyl Orange Dye

Organic solvent-free impregnation method was used to synthesize titanium-iron oxides (TIOs) nanomaterial. The physical properties of synthesized TIOs materials were characterized by XRD, SEM–EDX, BET, UV–Vis, and FTIR analytical techniques. The appearance of iron oxide (IO) on SEM image, XRD, and EDX spectra, the redshift on UV–Vis spectra of TIO compared to titanium oxide (TO), and intensity reduction in FTIR spectra proves the good impregnation of IO in TO lattice. The passing of t...

A Review on Advancements of Nanocomposites as Efficient Anode Modifier Catalyst for Microbial Fuel Cell Performance Improvement

Non-renewable energy sources produced from natural coal and oil may result in climate change and global warming as greenhouse gases are to the environment. This is why the main utilization of energy sources on renewable and alternate green energy  to deliver power. Thus, a microbial fuel cell device is one of the cost-effective and environmentally friendly energy conversion devices that uses renewable organic wastes as fuel source and converts this stored chemical energy in to useful b...

Formation of Metastable Calcite-type Barium Carbonate During Low-temperature Decomposition of (Ba,Ti)- Precursor Complexes

Solid State Sciences 9 (2007) 303, doi:10.1016/j.solidstatesciences.2007.02.003, Abstract:: (Ba,Ti)-precursor complexes, important for the production of advanced BaTiO3 perovskitetype materials, undergo structural transformations and complex reactions during their thermal decomposition. Based on XRD phase analysis, combined with Rietveld refinement of crystal structure data, and on IR analysis, the intermediate formation of calcite-type BaCO3 is evidenced, which can be explained by the stabi...

Barium Titanate via Thermal Decomposition of Ba,Tiprecursor Complexes: The Nature of the Intermediate Phases

Solid State Sciences 9 (2007) 21, doi:10.1016/j.solidstatesciences.2006.09.004, Abstract:: The thermal decomposition of Ba,Ti-precursor complexes, containing organic ligands and suitable for the single-source preparation of nanocrystalline BaTiO3, leads firstly to the segregation of specific Ba-rich and Ti-rich phases. Quantitative electron energy lossspectroscopy and powder X-ray diffraction data indicated that the (i) Ba-rich phase is a BaOstabilised variant of the calcite-type high tempera...

Semiconducting Properties of Ge-BaSnO3

Journal of Alloys and Compounds 506 (2010) 678–682, doi:10.1016/j.jallcom.2010.07.041, Abstract:: The electrical and optical properties of Ge-doped BaSnO3 ceramics sintered at various temperatures have been investigated to determine their semiconductor behavior. The electrical conductivity of Ge-doped BaSnO3 samples increases with increase in temperature, confirming that the samples exhibit a semiconductor behavior. A maximum conductivity value of 6.31 × 10−9 S/cm was observed for the sa...

Thermoanalytical, Optical, and Magnetic Investigations on Nanocrystalline Li0.5Fe2.5O4 and Resulting Ceramics Prepared by a Starch-based Soft-chemistry Synthesis

Journal of Solid State Chemistry 287 (2020) 12138. DOI: 10.1016/j.jssc.2020.121380 Abstract: Nanocrystalline Li0.5Fe2.5O4 was prepared by a starch-based soft-chemistry synthesis. Calcining of the (LiFe)-gel between 350 and 1000 °C results in Li0.5Fe2.5O4 powders with crystallite sizes from 13 to 141 nm and specific surface areas between 35 and 7.1 m2 g-1. XRD investigations reveal the formation of ordered Li0.5Fe2.5O4. Sintering between 1050 and 1250 °C leads to ceramics with relative den...

BaGeO3 as Sintering Additive for BaTiO3-MgFe2O4 Composite Ceramics

RSC Adv., 2015, 5, 71491, DOI: 10.1039/c5ra12312g, Abstract:: BaTiO3-MgFe2O4 composites (30 wt.% MgFe2O4) with a small addition of BaGeO3 as a sintering additive were synthesized by a one-pot Pechini-like sol-gel process. Nano-crystalline composite powders with a crystallite size of about 10 nm were obtained after reaction at 700 °C for 1 h. Magnetic investigations suggest that the nano-powder is in its superparamagnetic state at room temperature. The addition of BaGeO3 leads to an improved...

Characterization Of SnxSey /SnO2: Co p-n Junction Deposited By Spray Pyrolysis For Photovoltaic Application

ABSTRACT Research on utilization of solar energy has been stimulated by Energy crisis in everyday usage of energy. Photovoltaic hold great hopes towards solving energy crisis since they are environment friendly, sunlight is free, abundant and not likely to be exhausted in the near future. In this study SnxSey and SnO2: Co thin films were prepared by spray pyrolysis deposition technique at deposition temperatures of 400 K and 500 K respectively. SnxSey precursor was prepared using 0.05M SnCl4...

Novel Comparative Study And Characterization Of Plant Dyes In Tio2 Matrix For Dye Sensitized Solar Cells Applications

ABSTRACT A good energy mix is desirable for sustainability of the energy needs of many countries. Currently, electricity, including that sourced from photovoltaic cells is widely used for not only homesteads but also for industries. The desire to develop a cost-effective source of energy has motivated the development of dye sensitized solar cells. This technology has motivated a lot of research owing to its improved efficiency. This work has utilized plant extracts using a binder to deve...

Optical And Electrical Characterization Of Sns – Sno2: Sb P-N Junction For Solar Cell Applications

ABSTRACT For sustainability of future civilization, development of alternative clean energy technologies to replace fossil fuels has become one of the most crucial and challenging problems of the last few decades. Thin film solar cells is one of the major photovoltaic technologies that is promising for renewable energy conversion. The PV cells currently in use today are silicon based, though other cells have been fabricated using other semiconductors. Recent research is focused on fabrication...

Models Of Tensile Behaviour Of Meta-Stable Fe-Mn-Mo Alloys

ABSTRACT  A semi-mechanistic model for predicting the flow behaviour of Fe-Mn-Mo steels displaying transformation-induced plasticity is developed in this paper. The model, based on the law of mixtures, takes into account the work-hardening of the individual principal phases (namely, lath-martensite and austenite/epsilon martensite). The composite strength of such a steel may be given by a modified law of mixtures which incorporates a dislocation density effect. To test the validity of the m...

Deformation Characteristics And Work-Hardening Behaviour Of Some High Strength Manganese Steels.

Abstract A Study Has Been Made On A New Type Of Wear Resistant/High Strength Iron-Manganse-Molybdenum Steel. This Study Includes The Influence Of Composition And Heat Treatment On The Mechanical Properties. The Exceptional Work-Hardening Rate Is Due To Strain-Induced Formation Of Lath Martensite Which Itself Also Takes Part In The Work-Hardening Process. The Influence Of Higher Molybdenum Contents Was Evident In Preventing Brittleness Of The Solution Treated Steels. An Optimum Composition Ran...

Deformation Characteristics And Work-Hardening Behaviour Of Some High Strength Manganese Steels

ABSTRACT A study has been made on a new type of wear resistant/high strength iron-manganse-molybdenum steel. This study includes the influence of composition and heat treatment on the mechanical properties. The exceptional work-hardening rate is due to strain-induced formation of lath martensite which itself also takes part in the work-hardening process. The influence of higher molybdenum contents was evident in preventing brittleness of the solution treated steels. An optimum composition ran...


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