AgNPs@PSi substrate can detect abamectin molecules at concentrations as low as 5.7 × 10−9 M, with an enhancement factor of 1 × 106. Such a remarkable SERS substrate promises great potential for practical applications in food security.
In this study, a recorded high open-circuit voltage (V oc ) of 1.61 V and fill factor (FF) of 76.65% of a-Si:H p-i-n/heterojunction with intrinsic thin layer (HIT)-type multi-junction solar cells were achieved using grain size enlargement within the p-type μc-Si:H layer in a p-type μc-Si:H/ntype a-Si:H tunneling recombination junction (TRJ) layer. The p-type μc-Si:H layer's conductivity increased from 1.74×10 −4 to 0.1 S cm −1 as the film's crystallinity increased from 41.5% to 67.5%. The a-Si:H p-i-n/HIT-type multi-junction solar cells also benefited from the tuning up crystalline p-type μc-Si:H layer, showing the increase of V oc and FF from 1.5 V and 49.88% to 1.61 V and 76.65%, respectively; while the short-circuit current density (9.38±0.2 mA cm −2 ) did not change significantly. These are the highest V oc and FF values achieved in a-Si:H p-i-n/HIT-type multi-junction solar cells, recently. From dark current-voltage analysis, it was deduced that the enhanced crystalline films could assist in suppressing carrier interference in the TRJ layer, thus reduces electric field distortion and mitigates recombination in the device. In summary, an enhanced crystalline p-type μc-Si:H layer could be a viable option for ensuring an excellent TRJ layer, thus achieved high efficiency of inorganic/c-Si tandem solar cells. Using optimal condition with crystallinity of 74.1%, the photovoltaic parameters of the device yield V oc , J sc and FF of 1.51 V, 13.01 mA cm −2 and 71.45%, which in turned giving an efficiency of 14.04% for a-SiGe:H p-i-n/HIT-type tandem solar cell.
In this work, photovoltaic devices with CdSe QDs-photoanodes doped Cu and Mn metals using the Successive ionic layer adsorption and reaction method for highefficiency performance. Here, the molar dopant of Cu was studied from 0% to 5%, while Mn molar was changed between 0% and 40% to optimize conditional experiment. This result shows an increase of current density in both CdSe doped on Cu and Mn as a result of the enhancing light absorption and reducing recombination when a ZnS layer was used as passivation. In fact, a high 4.24% of efficiency for CdSe doped on Cu and 3.9% of efficiency for CdSe doped on Mn were archived comparing with pure CdSe QDs.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.