TY  - JOUR
AU  - Naboka, Michael
AU  - Subach, Sergey
AU  - Nefedov, Alexei
AU  - Tautz, Frank Stefan
AU  - Wöll, Christof
TI  - Direct Evidence of the Temperature-Induced Molecular Reorientation in Tetracene Thin Films on AlO$_{x}$ /Ni $_{3}$ Al(111)422
JO  - The journal of physical chemistry  / C
VL  - 118
IS  - 39
SN  - 1932-7455
CY  - Washington, DC
PB  - Soc.
M1  - FZJ-2014-05602
SP  - 22678 - 22682
PY  - 2014
AB  - Control over the optical properties of the fluorescent organic layer plays a key role in the development of organic light-emitting diodes. A combination of near-edge X-ray absorption fine structure spectroscopy and X-ray photoelectron spectroscopy was used to study structural changes in thin films of tetracene on AlOx/Ni3Al(111). It is shown that upon deposition onto the cold (100 K) substrate, a monolayer of tetracene molecules adopts a disordered adsorption configuration with the molecular planes orientated almost parallel to the surface. Upon annealing at 280 K, the molecular packing changes and the tetracene units adopt a more upright orientation. The consequences of this orientational change for the luminescent properties of the molecular adlayer are discussed, in particular with regard to a quenching of the optical excitation by an electronic coupling of occupied and unoccupied molecular states to those of the metal substrate
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000342652000031
DO  - DOI:10.1021/jp507773f
UR  - https://juser.fz-juelich.de/record/172053
ER  -