Dependence of the surface roughness of MAPLE-deposited films on the solvent parameters

摘要: Matrix-assisted pulsed laser evaporation (MAPLE) was used to deposit layers of poly(9,9-dioctylfluorene) (PFO) study the relation between solvent properties (laser light absorption, boiling temperature and solubility parameters) morphology deposited films. To this end, polymer diluted (0.5 wt%) in tetrahydrofuran—THF, toluene toluene/hexane mixtures. The thickness films equal 70±20 nm. uniformity investigated by Atomic Force Microscopy photoluminescence emission films, respectively. It is shown that, although parameters solvents are important controlling film roughness morphology, optical absorption play a very role, too. In fact, for matrices characterized same total parameter, lower values obtained prepared using with penetration depth radiation higher temperatures.