Volume 5, Issue 3, May 2013
Index of content:
This work reports on the synthesis of nanopowder and nanoink of Copper-Indium-Gallium-(di)Selenide (CIGS) (CuIn0.7Ga0.3Se2) of 20–80 nm with a band gap of 1.1 eV by a facile microwave technique. For CIGS synthesis, precursor mixtures consisting of metal acetylacetonates and selenium powder in oleylamine were heated in a microwave at 180–210 °C for 20–60 min. The resultant nanopowder was characterized and optimized for particle size by dynamic light scattering, phase by X-ray diffraction, morphology, and elemental distribution by scanning electron microscopy and band-gap by UV-Vis-near-infrared spectroscopy. CIGS ink, suitable for spin coating and ink-jet printing, was prepared and thin film was deposited and characterized.
A sustainable energy policy for Slovenia: Considering the potential of renewables and investment costs5(2013); http://dx.doi.org/10.1063/1.4811283View Description Hide Description
In this paper, Slovenia's current energy policy is analyzed, the potential of renewable energy sources (RES) is evaluated and examined, and new options for the development of an alternative energy policy and the transition of the Slovenian energy industry into a sustainable energy industry are proposed and cross compared. On the basis of current and future electricity consumption, the evaluated RES potentials, and calculated investment prices, options for alternative investment projects and the alternative development of a more sustainable energy policy in Slovenia are identified. These possibilities and the current energy policy are analyzed and cross-compared from the economic and environmental viewpoint, with special emphasis on investment costs. At the end of the paper, the implementation costs of the proposed alternative energy policy investments are evaluated, calculated, and cross-compared, and the advantages and disadvantages of the alternative energy policy are evaluated. The proposed alternatives have significant benefits in comparison to the existing energy strategy, which focuses on a new lignite thermal power plant. Reconstruction of the existing thermal power plant in Šoštanj is a considerably cheaper alternative and a sound transitory solution for Slovenia. Investment in a multiple fuel power plant is also a cheaper and more efficient alternative, which, in addition, enables the usage of local biomass. Another considerably cheaper and more efficient alternative with lower emissions is a gas-steam power plant. The most promising alternative is found to be electricity production from local RES, resulting in a significant reduction of energy related emissions and domestic sources usage. The estimated investment costs for the last alternative are comparable to the costs for the implementation of Slovenia's current energy policy.