Nanoscale quantitative chemical mapping of conjugated polymer blends.
Utilizing scanning transmission X-ray microscopy (STXM), we present a quantitative chemical analysis of the bulk composition of spin-coated blends of poly(9,9-dioctylfluorene-co-N-(4-butylphenyl)diphenylamine) (TFB) and poly(9,9'-dioctylfluorene-co-benzothiadiazole) (F8BT) used in efficient polymer light emitting diodes. With a lateral resolution of 50 nm, we reveal nanoscale subsurface chemical structure and show that in particular while blend composition remains constant within the TFB-rich domain, in the F8BT-rich phase there is an enrichment of F8BT at the domain interface.
McNeill
Christopher R
CR
Cavendish Laboratory, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom. crm51@cam.ac.uk
Watts
Benjamin
B
Thomsen
Lars
L
Belcher
Warwick J
WJ
Greenham
Neil C
NC
Dastoor
Paul C
PC
D008422:Materials Testing; D017348:Microscopy, Electron, Scanning Transmission / Q000379:methods*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D044367:Phase Transition; D011108:Polymers / Q000737:chemistry*; D012996:Solutions
D011108:Polymers; D012996:Solutions