Increasing the conductivity of polycrystalline zinc oxide fi lms without impacting the transparency is a key aspect in the race to fi nd affordable and high quality material as replacement of indium-containing oxides. Usually, ZnO fi lm conductivity is provided by a high doping and electron concentration, detrimental to transparency, because of free carrier absorption. Here we show that hydroge...

The study reports some preliminary investigations on the template free synthesis of a scantly investigated polyaniline (PANI) derivative-Phenylenediamine (PDA) by template free method in the presence of Oxalic acid (OA) (dopant), using Ammonium Persulfate as oxidant. Polymerization of Phenylenediamine (PDA) was confirmed by the FT-IR as well as UV–visible studies. The morphology of Phenylenedia...

Within a single-electron picture and perturbation theory, expressions for the electrical conductivity !exemplified by the Kubo-Greenwood formula" exhibit divergences for degenerate states and states which are near resonance with an ac field. In this paper, we obtain expressions for the conductivity starting with a manyparticle approach, and we emphasize the importance of quantum statistics for ...

The theoretical oriented scientist cannot be envied, because nature, i.e. the experiment, is a relentless and not very friendly judge of his work. In the best case scenario it only says “maybe” to a theory, but never “yes” and in most cases “no”. If an experiment agrees with theory it means “perhaps” for the latter. If it does not agree it means “no”. Almost any theory will experience a “no” at...