The effect of selenium-free annealing on cesium fluoride (CsF)-treated Cu(In,Ga)Se2 (CIGS) thin films is investigated and their solar cell performance evaluated. Annealing CsF-treated CIGS changes the surface morphology chemical composition, reduces Urbach energy. However, full benefit reduced energies annealed samples not obtained, because an increased buffer/CIGS interface recombination as a ...

Organometal halide perovskite semiconductors have emerged as promising candidates for optoelectronic applications because of the outstanding charge carrier transport properties, achieved with low-temperature synthesis. Here, we present highly sensitive sub-bandgap external quantum efficiency (EQE) measurements of Au/spiro-OMeTAD/CH3NH3Pb(I1−xBrx)3/TiO2/FTO/glass photovoltaic devices. The room-t...

A 9 year old boy with juvenile dermatomyositis developed pulmonary alveolar lipoproteinosis. This previously unreported association was treated successfully by bronchoalveolar lavage.

The “mixed alkali effect” is one of the classical anomalies of glass science. We report here an interesting phenomenon “Mixed Alkali Effect” observed for a series of Cu ions doped xLi2O-(30x)Na2O-70B2O3 (5 ≤ x ≤ 25) glasses, investigated by EPR and optical absorption techniques. The EPR spectra of all the investigated samples exhibit resonance signals characteristic of Cu ions in octahedral sit...

Micro-ring structured zinc oxide (ZnO) thin films were prepared on glass substrates by spray pyrolysis and their structural, morphological, optical and electrical properties were investigated. X-ray Diffraction (XRD) analysis revealed the films' hexagonal wurtzite phase with a preferred (002) grain orientation. The mean crystallite size calculated on the basis of the Debye-Scherrer model was 24...

In the case of optical sensors such as Surface Plasmon Resonance (SPR) sensor, Fe3O4 nanoparticles play a role to boost signal however they can increase detection sensitivity biosensor. For this application, properties need be studied. The are described in terms their constants. Therefore, work was purposed study effect particle size and lattice strain on constants nanoparticles. Samples were s...

Hydrogenated amorphous silicon-chalcogen alloy thin films have been the subject of growing interest during the past two decades. Thin films of these alloys are usually prepared by the decomposition of SiH4 and H2S or H2Se gas mixtures in a radiofrequency plasma glow discharge at a substrate temperature of 250°C. The alloy composition is varied by changing the gas volume ratio RV = [chalcogen/ s...