Thesen_et_al-2010-Journal_of_Polymer_Science_Part_A-_Polymer_Chemistry英文文献资料.pdf

Investigation of Spacer Influences in Phosphorescent-Emitting Nonconjugated PLED Systems MANUEL W. THESEN,1 HARTMUT KRUEGER,1 SILVIA JANIETZ,1 ARMIN WEDEL,1 MARION GRAF2 1Fraunhofer-Institut fuer Angewandte Polymerforschung, Wissenschaftspark Golm, Geiselbergstr. 69, Potsdam D-14476, Germany 2Department Chemie der Ludwig-Maximilians-Universitaet Muenchen, Butenandtstraße 5-13, Muenchen D-81377, Germany Received 19 August 2009; accepted 23 October 2009 DOI: 10.1002/pola.23796 Published online in Wiley InterScience (). ABSTRACT: An assay was introduced to clarify influences on cies were 28 cd A1 @ 6 V (green), 4.9 cd A1 @ 5 V (red) and electroluminescent behavior for RGB-colored phosphorescent 4.3 cd A1 @ 6 V (bluish). In summary we assume that an terpolymers with N,N-Di-p-tolyl-aniline as hole-transporting improved charge percolation pathways regarding to the higher unit, 2-(4-biphenyl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (tert- content of semiconducting molecules and an improved charge BuPBD) as electron-transporting unit, and different iridium com- transfer to the phosphorescent dopand in the case of the plexes in RGB-colors as triplet emitting materials. All monomers copolymers without spacers are responsible for the better device were attached with spacer moieties to the ‘‘para’’ position of a performance comparing the copolymers with hexyl spacers. The polystyrene. Polymer light emitting diodes (PLEDs) were built to approach of the directly connected charge transport materials at study the electro-optical behavior of these materials. The gist the nonconjugated styrene polymer backbone should be favored