Relatively fast achievements in the kesterite solar cell technology have been made over last decade, but experimental efficiency is still ?13%. One proposed reason an inappropriate band alignment with Cu2ZnSnS4 (CZTS) and CdS that results strong interface recombination losses. Results of this work show temperature duration air annealing CZTS/CdS heterojunction are essential for device performan...

Thin-film solar cells are simple and affordable to produce, but their efficiency is low compared crystalline-silicon cells, needs be improved. This study investigates the photovoltaic performance of different absorber materials (CdTe, CIGS, Sb2Se3, CZTS) with structure Au/absorber/CdS/ITO. The research uses SCAPS (Solar Cell Capacitance Simulator), a mathematical model based on Poisson continui...

The electrical properties, the spontaneous polarization, and the piezoelectric response of ZnO can be tailored by alloying ZnO with BeO for applications such as electrodes in flat panel displays and solar cells, blue and ultraviolet (UV) light emitting devices, and highly sensitive UV detectors. We present here the results of a study that employs density-functional theory to analyze the crystal...

Abstract We report a “nano-on-micro” approach for growth of cactus-like nanostructures zinc oxide (ZnO) gas sensing application. use electrospun polymeric fibers doped with catalyst nanoparticles as the template and employ vapor-liquid-solid (VLS) method to ZnO nanostructures. Controlling processing variables in VLS process yields needle-like around fibers, which resembles needles cactus. The n...

This paper aims to study the properties of absorber layer and heterojunction in kesterite solar cells. The Cu2ZnSnS4 (CZTS) thin films were layered on a glass substrate from colloidal solution metal salts thiourea dissolved mixture water ethanol deposited by spin coating technique. samples then heat treated furnace, presence sulphur powder under nitrogen gas flow. results revealed formation hom...

We report the first successful synthesis and characterization of single-crystal wurtzite CdSe nanoribbons through a simple thermal evaporation process. Asymmetric growth of the nanoribbons occurs, yielding a sawlike shape with sharp teeth on one side. This asymmetric growth is suggested to be induced by the polarization of the c-plane in the wurtzite crystal structure.

This work aims at the development of a method electromagnetic activation salicylic acid molecules per se (SA) through ultrasonic (20 kHz) complexation with oxidized zinc-graphene structure. The result this implies synthesized nanopartiсles “ZnO – partially restored graphene oxide (rGO) SA” average size (5.53 ± 0.11) nm and hexagonal wurtzite zinc structure complexed SA molecules. Complexation r...

GaAs was radially deposited on InAs nanowires by metal-organic chemical vapor deposition and resultant nanowire heterostructures were characterized by detailed electron microscopy investigations. The GaAs shells have been grown in wurtzite structure, epitaxially on the wurtzite structured InAs nanowire cores. The fundamental reason of structural evolution in terms of material nucleation and int...

Ambient S annealing was adopted to regulate the crystallinity of a ZnS microsphere, which resulted in a significant improvement in the photocatalytic hydrogen production activity (PHPA). Moreover, with S ambient treatment, wurtzite ZnS showed better PHPA than sphalerite ZnS, possibly because the inter-polar electric field of the wurtzite phase could promote the separation of photo-excited elect...

Successful implementation of molecular solution processing from a homogeneous and stable precursor would provide an alternative, robust approach to process multinary compounds compared with physical vapor deposition. Targeting deposition of chemically clear, high quality crystalline films requires specific molecular structure design and solvent selection. Hydrazine (N2H4) serves as a unique and...