Our recent article entitled “Resonant photoemission spectroscopy for intermediate band materials” is published in Applied Physics Letters (107, 192104 (2015); doi: 10.1063/1.4935536):
We have studied Cr-doped ZnS films for application in intermediate band solar cells. The goal was to understand the origin of intermediate bands in doped ZnS. In the article, we show that the intermediate-band can be characterized using resonant photoemission spectroscopy, revealing the filling and specific orbital character of the states contributing to the resonant photoemission signal. The methodology can be widely extended to a large variety of materials, providing useful information towards engineering of high efficiency intermediate band solar cells and of other optoelectronic devices. More information are available in this presentation.