.

J. Seeger et al. developed a novel method, which allows for a non-destructive determination of the band-gap energy of extremely thin layers in CIGS solar cells. (Appl. Phys. Lett. 115, 263901 (2019))

This book provides a comprehensive introduction to the linear optical properties of semiconductors. Inserts on important experimental techniques as well as sections on topical research support research-oriented teaching and learning.

T. Siegle et al. successfully realized a laser source with a few micrometer in dimension, which is tunable over a wide spectral range. This was achieved using micro resonators on flexible substrates. (APL Photonics 2, 096103 (2017))

F. Ruf et al. gain new insight into optoelectronic properties of perovskite solar cells. Transitions of excitonic nature were investigated using temperature dependent optical spectroscopy. (Appl. Phys. Lett. 112, 083902 (2018))