Stefan Krause

TL;DR: In this paper, the effects of a KCN etch of the CZTS absorber prior to CdS deposition on the band alignment at the respective interface were studied.

TL;DR: In this paper, the energy levels involved in photogeneration and charge transport within conjugated polymers are investigated. But the authors focus on a specific case of poly(3-hexylthiophene) and do not consider the general applicability of their approach.

TL;DR: Depth-dependent photoemission measurements reveal that the VBM decreases with increasing surface sensitivity for both samples; this effect is more pronounced for the NaF/KF-PDT CIGSe sample, and can be linked to the recent breakthroughs in CigSe device efficiencies.

TL;DR: In this paper, a comprehensive discussion on the determination of transport levels of organic semiconductors using a combination of UV and inverse photoemission spectroscopies (UPS and IPS, respectively) is presented.

TL;DR: In this paper, the chemical and electronic surface structure of thin-filmsolar cell absorbers has been investigated by direct and inverse photoemission, with particular emphasis on the impact of KCN etching, which significantly alters the surface composition and is best explained by a preferred etching of Cu and, to a lesser degree, Sn.