TY  - THES
AU  - Konrad, Ritter
TI  - Local atomic structure of kesterite type materials
PB  - University of Leipzig
VL  - Dissertation
CY  - Leipzig
M1  - PUBDB-2021-04647
SP  - 131
PY  - 2021
N1  - Dissertation, University of Leipzig, 2021
AB  - Kesterite type materials are researched for their ability to form thin film solar cell absorbers from earth abundant and non-toxic elements. Main routes to increase their efficiencies to the level of competing materials include compositional variations such as deviations from stoichiometry and alloying. While the long range structural impacts of these methods are well known, similarities with chalcopyrites indicate that the local atomic structure will not change on the same order of magnitude. This thesis hence employs low temperature Extended X-ray Absorption Fine Structure spectroscopy (EXAFS) measurements on off-stoichiometric or alloyed powder samples and thin films, to reveal the small changes in local atomic environments. It is shown that kesterites tend to keep many aspects of their local atomic structure despite major compositional changes. Yet, both the impact of these small changes on band gap energy as well as further value of probing the local atomic structure of kesterite thin films are demonstrated.
LB  - PUB:(DE-HGF)11
DO  - DOI:10.3204/PUBDB-2021-04647
UR  - https://bib-pubdb1.desy.de/record/471803
ER  -