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Polystyrene backbone polymers consisting of alkyl-substituted triazine side groups for phosphorescent OLEDs

: Salert, B.C.D.; Wedel, A.; Grubert, L.; Eberle, T.; Anemian, R.; Krueger, H.

Volltext ()

Advances in materials science and engineering. Online journal (2012), Art. 385178, 15 S.
ISSN: 1687-8442
ISSN: 1687-8434
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IAP ()

This paper describes the synthesis of new electron-transporting styrene monomers and their corresponding polystyrenes all with a 2,4,6-triphenyl-1,3,5-triazine basic structure in the side group. The monomers differ in the alkyl substitution and in the meta-/paralinkage of the triazine to the polymer backbone. The thermal and spectroscopic properties of the new electron-transporting polymers are discussed in regard to their chemical structures. Phosphorescent OLEDs were prepared using the obtained electron-transporting polymers as the emissive layer material in blend systems together with a green iridium-based emitter 13 and a small molecule as an additional cohost with wideband gap characteristics (CoH-001). The performance of the OLEDs was characterized and discussed in regard to the chemical structure of the new electron-transporting polymers.