Sb2Se3 has emerged as an important photoelectrochemical (PEC) and photovoltaic (PV) material due to its rapid rise in photoconversion efficiencies. However, a complex defect chemistry, which reduces the maximum photovoltage. Thus, it is understand these defects develop passivation strategies Sb2Se3. A comprehensive investigation of charge carrier dynamics influence sulfur treatment on optoelect...

In this experimental work, nitrogen-doped carbon quantum dots were successfully synthesized with hydrothermal of the milk. The product was composed of a powder and a stable colloid. The structure of the product was examined by XRD, EDS and FT-IR analysis. Also the particle size of the product was investigated by SEM and TEM images and the results showed the product is mainly composed of the par...

In this study, we quantify the impact of C60-passivation layers in Cs0.15FA0.85PbI2.75Br0.25 double-cation perovskite solar cells. We apply a combination impedance spectroscopy, photoluminescence (PL) and X-ray diffraction (XRD) to identify origin for increase power conversion efficiencies operational stability cells fabricated with C60/ZnO electron transport layer (ETL) versus reference ZnO ET...

CO2 laser induced pyrolysis of silane was used to produce silicon nanoparticles with an average diameter as small as 5 nm at high rates (up to 200 mg/h). Etching these particles with a mixture of hydrofluoric acid (HF) and nitric acid (HNO3) reduces their size and passivates their surface such that they exhibit bright visible photoluminescence (PL). This paper describes the attachment of organi...

The thermal expansion coefficient (TEC) of binary glasses SiO 2 -TiO decreases as the TiO concentration grows. At in range 4-6 mol% (in dependence applied synthesis method) TEC becomes negative; at 8-11 devitrification occurs. A combination photoluminescence (PL) and IR reflection techniques were for studying evolution point structural defects from zero to phase separation. precision measuremen...

Using phosphine-free and "green" chalcogen precursors, controlled synthesis of high quality CdS/ZnSe/ZnS core/shell1/shell2 nanocrystals has been successfully carried out using different sized CdS nanocrystals as cores. The properties and structures of the synthesized nanocrystals were characterized by absorption spectroscopy, photoluminescence (PL) spectroscopy, X-ray diffraction (XRD), transm...

Abstract Ternary Ag-In-S and quaternary Ag-In-Zn-S nanoparticles with different ratio of Ag/In/Zn/S are synthesized. The incorporation Zn into leads to the increase in optical bandgap blue shift photoluminescence (PL). properties these significantly dependent on chemical composition nanoparticles. Time-resolved PL spectroscopy nanosecond time regime is used study recombination processes carrier...

While silicon nanocrystals (ncSi) embedded in silicon dioxide thin films have been intensively studied in physics, the potential of batch synthesis of silicon nanocrystals from the solid-state disproportionation of SiO powder has not drawn much attention in chemistry. Herein we describe some remarkable effects observed in the diffraction, microscopy and spectroscopy of SiO powder upon thermal p...

Abstract The study of nitrogen-vacancy (NV) centers in diamond are growing attractive the application quantum devices. Here, electrical control NV charge state and defects induced by nitrogen ions implantation were investigated transient photocapacitance (TPC) spectroscopy photoluminescence (PL) spectroscopy. experiments show that thresholds 1.2 eV appeared TPC spectra probably due to presence ...

Research comparing the advantages of spin coating and chemical bath deposition is going, there are varied views on these methods. Here, we used to prepare thin films ZnS nanoparticles. The film was analysed by photoluminescence (PL) spectrophotometry, field emission scanning electron microscopy (FE-SEM), ultraviolet spectroscopy (UV-Vis), energy-dispersive X-ray (EDX) spectroscopy. UV-Vis spect...