Intermediate band materials for more efficient solar energy use: quantum modelling and experimental realizations

摘要: The intermediate band (IB) solar cell (Fig. 1) has been proposed [1] to increase photovoltaic efficiency by a factor above 1.5, based on the absorption of two sub-bandgap photons promote an electron across bandgap. To realize this principle, that can be applied also obtain efficient photocatalysis with sunlight, we in recent years several materials where metal or heavy element, substituting for electropositive atom known semiconductor appropriate gap width (around 2 eV), forms inside partially filled levels needed aim