Abstract Photodiodes are ubiquitous in industry and consumer electronics. Constantly emerging new applications for photodiodes demand different mechanical optoelectronic properties from those provided by conventional inorganic-based semiconductor devices. This has stimulated considerable interest the use of organic semiconductors, which provide a vast palette available properties, can be incorp...

We argue that string theory has all the ingredients to provide us with candidates for the cold dark matter and explain the current acceleration of our Universe. In any generic string compactification the dilaton plays an important role as it couples to the Standard Model and other heavy nonrelativistic degrees of freedom such as the string winding modes and wrapped branes, we collectively call ...

The influence of the thickness of the nanostructured, mesoporous TiO₂ film on several parameters determining the performance of a dye-sensitized solar cell is investigated both experimentally and theoretically. We pay special attention to the effect of the exchange current density in the dark, and we compare the values obtained by steady state measurements with values extracted from small pertu...