Toward well-defined metal-polymer interfaces: temperature-controlled suppression of subsurface diffusion and reaction at the calcium/poly(3-hexylthiophene) interface.
The thickness of the reaction zone at the interface between calcium and regioregular poly(3-hexylthiophene), which is one of the best performing metal/polymer combinations in photovoltaic devices, depends critically on the temperature of the polymer during the initial phase of metal deposition. It is shown that deposition at 130 K reduces the thickness of the reaction zone, an effect that also persists after warming to room temperature.
Bebensee
Fabian
F
Universität Erlangen-Nürnberg, Lehrstuhl für Physikalische Chemie II and Interdisciplinary Center for Molecular Materials (ICMM), Egerlandstr. 3, 91058 Erlangen, Germany.
Schmid
Martin
M
Steinrück
Hans-Peter
HP
Campbell
Charles T
CT
Gottfried
J Michael
JM
D002118:Calcium / Q000737:chemistry*; D004058:Diffusion; D013696:Temperature; D013876:Thiophenes / Q000737:chemistry*
D013876:Thiophenes; C507295:poly(3-hexylthiophene); D002118:Calcium