In situ analysis of the Zn(S,O) buffer layer preparation for chalcopyrite solar cells by Zn L-edge X-ray absorption spectroscopy.
Bridging the gap between high-vacuum soft X-ray absorption spectroscopy and real systems under ambient conditions probes chemical reactions in situ during deposition and annealing processes. The origin of highly efficient buffer layers in Zn(S,O) is the complex formation between Zn(2+) and the S=C group of thiourea (see schematic), which allows ligand-to-metal and metal-to-ligand charge transfer (LMCT and MLCT).
Lauermann
Iver
I
Helmholtz Zentrum für Materialien und Energie, Glienicker Str. 100, 14109 Berlin, Germany.
Kropp
Timo
T
Vottier
Damien
D
Ennaoui
Ahmed
A
Eberhardt
Wolfgang
W
Aziz
Emad F
EF