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An increase in market share of very high-efficiency solar cell concepts, such as interdigitated back contact (IBC) solar cells, is typically limited by their high cost due to complex and expensive processing sequences. Implementation of localized laser-doped contacts is a promising route to reduce fabrication costs while maintaining the high-efficiency potential of such solar cell concepts, also offering...
Bulk heterojunction (BHJ) organic solar cells (OSC) containing zinc oxide (ZnO) nanoparticles (NPs) in the active layer were fabricated. The BHJ active layers consisted of poly(3-hexylthiophene-2,5-diyl) (P3HT), [6,6]-Phenyl-C61-Butyric Acid Methyl Ester (PCBM) and additionaly ZnO NPs were doped. We found that the power conversion efficiency (PCE) strictly depend on the size and the concentration...
We report changes observed in the I–V characteristics of ZnO and MgZnO nanoparticle thin films after annealing in H2 at sufficiently high temperatures. The nanoparticles were grown on insulating silicon substrates and had an average diameter of 30 nm. The devices were of a two terminal design, where the terminals consisted of two 25 µm diameter gold wires laid parallel to each other on the nanoparticle...
In this paper, MgB2 bulks were prepared with doped TiO2 nanoparticles surface-modified by 5-10% SiO2. Quantitative X-ray diffraction (XRD) analysis was performed to obtain the weight fraction of impurities using the Rietveld method. The effects of addition of TiO2/SiO2 nanoparticles on the critical temperature (Tc), the upper critical field (Hc2), and the irreversibility field (Hirr) as a function...
We report thermoelectric characterization of Bi2-xSbxTe3 (x = 0.5, 1.0, and 1.5) synthesized by a solvothermal method using DMF as solvent. For Bi2Te3, the size of the edge and thickness of the hexagonal nanoplatelets are 200-250 nm and 20-25 nm, respectively. Bi2Te3 nanosheets appear to grow epitaxially from the surface of the Te tubes, which forms in the first step and acts as the template for the...
Nanostructuring is one of the effective approaches to lower the thermal conductivity of materials. Nanostructured skutterudite-related compounds CoSb3, Fe0.5Ni0.5Sb3, Fe0.25Ni0.25Co0.5Sb3 and Te-doped CoSb3 were synthesized by a solvothermal route. The bulk materials were prepared by hot pressing or spark plasma sintering from the solvothermally synthesized nanopowders. The thermal conductivity values...
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