Journal of Materials Science: Materials in Electronics

https://link.springer.com/journal/10854

List of Papers (Total 193)

Surface modification of textile electrodes to improve electrocardiography signals in wearable smart garment

Recording high quality biosignals by dry textile electrodes is a common challenge in medical health monitoring garments. The aim of this study was to improve skin–electrode interface and enhance the quality of recorded electrocardiography (ECG) signals by modification of textile electrodes embedded in WearItMed smart garment. The garment has been developed for long-term health...

Direct surface patterning of amorphous chalcogenide layers with high- energy H+ and He+ ion beams

As (Ge)–S (Se) based amorphous bulk chalcogenide glasses and layers have been used for surface geometrical relief recording by 2 MeV energy H+ and He+ ion-beams. The formation of giant (height modulation from nanometers up to micrometers) geometrical reliefs (dots, lines), have been investigated. Efficiency of surface patterning was compared for selected compositions, type of ion...

Printed carbon based interface for protein immobilization

The aim of the investigations was to find a method of protein immobilisation in screen printed graphite layers. Three commonly used graphite powders were used to prepare conductive layers via screen printing. Several printing pastes with different carbon to polymer resin (polymethylmethacrylate) ratios were tested and the composition with the best electrical properties was...

Development of numerical analysis and methane sensing application of highly sensitive quantum crystals based on tin dioxide prepared by hydrothermal

The quantum size of materials is an effective property for specific physical applications. The theoretical approach helps in understanding the physical properties of these materials. SnO2 quantum crystals of ~ 1.8–6.0 nm are prepared by a hydrothermal method. The size of crystals is smaller than the Debye length reported for SnO2 at 250 °C. The emission spectra of the radiative...

Modification of NiOx hole transport layers with 4-bromobenzylphosphonic acid and its influence on the performance of lead halide perovskite solar cells

Lead halide perovskites have proved to be exceptionally efficient absorber materials for photovoltaics. Besides improving the properties of the perovskite absorbers, device engineering and the optimization of interfaces will be equally important to further the advancement of this emerging solar cell technology. Herein, we report a successful modification of the interface between...

Polymer–chalcogenide glass nanocomposites for amplitude–phase modulated optical relief recording

The main objective of this work was to combine the positive characteristics of transparent photopolymers and light-sensitive chalcogenide glasses, with aim to improve the amplitude–phase modulation characteristics of in situ optically recorded photonic elements on the surface, and in the bulk of thick composite layer on a given substrate. The positive results were obtained due to...

Solution processing route to Na incorporation in CZTSSe nanoparticle ink solar cells on foil substrate

Sodium is a key dopant in thin film photovoltaic cells with reported benefits including promotion of grain growth, passivation of grain boundaries and increased carrier concentration in chalcopyrite and kesterite based solar cells. Research-grade devices fabricated in substrate configuration often rely on diffusion of Na from a soda lime glass substrate into the photovoltaic...

The effect of post-process annealing on optical and electrical properties of mixed HfO2–TiO2 thin film coatings

In this paper a comparison of electrical and optical properties of mixed hafnium-titanium oxides is described. Thin films were deposited with the use of the magnetron co-sputtering method. For further analysis (Hf0.52Ti0.48)Ox and (Hf0.29Ti0.71)Ox coatings, which were amorphous directly after the deposition process, were chosen,. Moreover, post-process annealing was also...

Glass transition temperature of nanoparticle-enhanced and environmentally stressed conductive adhesive materials for electronics assembly

In our paper, the characterization of glass transition temperature (Tg) was performed for one- and two-component electrically conductive adhesive used in electronic joining technologies. Both adhesives were of the epoxy type with the silver filler. Dynamic mechanical analysis (DMA) was used to measure the Tg. The adhesives were modified with nanoparticles, namely, carbon...

MOVPE growth conditions optimization for AlGaN/GaN/Si heterostructures with SiN and LT-AlN interlayers designed for HEMT applications

In this work we present the influence of in situ deposited non-continous SiN layer and the chemical precursors III/V mole ratio change during GaN buffer growth for AlGaN/GaN/Si(111) heterostructures with low temperature AlN interlayer on their crystalline quality and electrical mobility of two dimensional electron gas (2DEG). We show, that application of SiN layer resulted in a...

Electrodeposition of CdS thin-films from cadmium acetate and ammonium thiosulphate precursors

Cadmium sulphide (CdS) thin-films have been electrodeposited using two electrode system to be used as the hole back diffusion barrier (hbdb) layer for graded bandgap solar cells with p-type windows. Cadmium acetate dihydrate [Cd(CH3COO)2·2H2O] and ammonium thiosulphate [(NH4)2S2O3] have been used as the cadmium (Cd) and sulphur (S) precursors respectively. In this work, CdS...

Characterization of electro-conductive textile materials by its biaxial anisotropy coefficient and resistivity

Woven and knitted fabrics were chosen to determine their electro-conductive properties. Van der Pauw equation modified by Wasscher for anisotropic materials was used. The electrical conductivity of textile materials was anisotropic as indicated by the biaxial anisotropy coefficient being in the range from 1.1 to 7.2. Resistance was higher when current flows between electrodes...

Early stages of wetting of copper by Sn–Zn eutectic alloy

The manuscript presents studies of the interaction of Sn–Zn eutectic solder alloy with a solid copper substrate, in the early times of the wetting process. The wetting tests were performed using the sessile drop method, with flux, in air, at 230 °C, 250 °C and 280 °C and reflow time of 2 s, 5 s, 10 s, 20 s, 40 s, 90 s and 180 s. The wetting time was measured from the moment of...

Temperature-dependent structural and magnetic properties of R2MMnO6 double perovskites (R = Dy, Gd; M = Ni, Co)

The structural and magnetic properties of the Dy2CoMnO6, Dy2NiMnO6 and Gd2CoMnO6 double perovskites are investigated using X-ray powder diffraction and squid magnetometry. The materials adopt an orthorhombic structure (space ground Pnma) with disordered Co(Ni)/Mn cations, and exhibit ferrimagnetic transitions near TC ~ 85, 95, and 115 K respectively. TC was found to monotonously...

Ternary organic solar cells doped methoxyphenyl indenopyrazoloquinoline derivatives

This paper discusses the results for heterojunction solar cells based on three components (with fullerene acceptor), which are based on the pyrazoloquinoline derivative. Photovoltaic devices based on ternary systems are presented along with a model optimization for such mixtures. The device bulk-heterojunction type cells represent architecture ITO/PEDOT:PSS/organic active layer...

High capacity organic memory structures based on PVP as the insulating layer

The electrical behaviour of organic memory structures based on gold nanoparticles (AuNPs) and poly 4-vinylphenol as the gate dielectric are reported in this work. Metal–insulator–semiconductor (MIS) and thin film transistor structures were used to fabricate the control and memory devices. The drain and source electrodes were fabricated by evaporating 50 nm gold, and the gate...