New spirobenzoanthracene derivatives with naphthylanthracene core: Synthesis and application in sky-blue fluorescent host materials
作者:Min-Ji Kim、Chil-Won Lee、Myoung-Seon Gong
DOI:10.1016/j.dyepig.2014.02.005
日期:2014.6
Blue light-emitting host materials with a spiro[benzoidelanthracene-7,9 '-fluorene] core, 3-[10-(naphthalene-1-yl)anthracene-9-yl]spiro[benzoideJanthracene-7,9 '-fluorenel (NA-SBAF) and 3410-(naphthalene1-yflanthracene-9-y11-1-methylspiro[benzo[de]] anthracene-7,9 '-fluorene] (NA-MSBAF), were designed and synthesized via coupling reactions. Introduction of a Spiro group into the anthracene moieties lead to a reduction in crystallization tendency, and a high glass transition temperature was observed. Typical blue fluorescent organic light-emitting diodes with the configuration of ITO/N,N-di(1-naphthyl)-N,N'-bis[(4diphenylamino)phenyll-biphenyl-4,4 '-diamie (60 nm)/N,N,M,W-tetra(1-biphenyl)-biphenyl-4,4 '-diamine (30 nm)/Host: Dopant (30 nm, 5%)/LG201 (ETL, 20 nm)/LiF/Al were developed using SBAF-type anthracene derivatives as a host material and p-bis(p-N,N-diphenyl-aminostyryl)benzene (DSA-Ph) as a sky-blue dopant material. A device obtained from NA-SBAF doped with DSA-Ph were compared with that of 9,10-dinaphthalene-2-yl-anthracene and showed blue color purity of 0.150 and 0.217, a luminance efficiency of 7.57 cd/A, and an external quantum efficiency >5.15% at 5.0 V. (C) 2014 Elsevier Ltd. All rights reserved.