38 documents found, page 1 of 4

In-Depth Inhomogeneities in CIGS Solar Cells: Identifying Regions for Performan...

ABSTRACT: When considering materials to be used as active layers in solar cells, an important required parameter is the proper knowledge of their elemental composition. It should be heavily controlled during growth in order to obtain the desired band gap and to decrease the recombination defects and then increase the solar cell electrical performance. Ion beam analytical (IBA) techniques and, in particular, par...

Nuclear microprobe: the tool to characterize new materials for energy conversio...

Corrigendum to “Compositional analysis by RBS, XPS and EDX of ZnO:Al,Bi and ZnO...

The authors regret for the typographical error in the value of the Zn 2p binding energy in some parts of the document. The authors would like to apologise for any inconvenience caused.

Comparative evaluation of the efficacy of phythotherapeutics and chemical produ...

Made available in DSpace on 2020-12-10T16:30:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-07-01; The aim of this research was to evaluate the efficacy of plant extracts and chemical products for the control of Boophilus microplus. Three commercial products for the control of Boophilus microplus were in vitro evaluated, chemical compounds of cypermethrin + DDVP and organophosphate as recomended by t...

Compositional analysis by RBS, XPS and EDX of ZnO:Al,Bi and ZnO:Ga,Bi thin film...

Rutherford backscattering spectrometry, X-ray photoelectron and X-ray energy dispersive spectroscopies were employed to analyse Bi incorporation into ZnO:Al and ZnO:Ga transparent and electrically conductive thin films deposited by d.c. magnetron sputtering, with thickness in the range of 300–400 nm. Sputtering was performed in an argon atmosphere from two targets in confocal geometry being one composed of eith...

Ultrafast low-temperature crystallization of solar cell graded formamidinium-ce...

Ultrafast low-temperature crystallization of solar cell graded formamidinium-ce...

ABSTRACT: The control of morphology and crystallinity of solution-processed perovskite thin-films for solar cells is the key for further enhancement of the devices’ power conversion efficiency and stability. Improving crystallinity and increasing grain size of perovskite films is a proven way to boost the devices’ performance and operational robustness, nevertheless this has only been achieved with high-tempera...

PIXE and RBS on CIGS solar cells to study the elemental distribution [Comunicaç...

The Composition of the São Brás Copper Hoard in Relation to the Bell Beaker Met...

A large ceramic vessel was discovered at São Brás (southern Portugal) containing a metallic hoard from the Chalcolithic/Early Bronze Age period. These weapons and tools were characterized by microanalytical techniques as being composed of copper with varying arsenic contents (2.2± 1.6 wt%) and minor amounts of lead, bismuth and iron. The collection shows a clear association between daggers and copper with a hig...

Assessment of dye distribution in sensitized solar cells by microprobe techniques

Dye sensitized solar cells (DSCs) have received considerable attention once this technology offers economic and environmental advantages over conventional photovoltaic (PV) devices. The PV performance of a DSC relies on the characteristics of its photoanode, which typically consists of a nanocrystalline porous TiO2 film, enabled with a large adsorptive surface area. Dye molecules that capture photons from light...