Spirobenzofluorene linked anthracene derivatives: Synthesis and application in blue fluorescent host materials
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- 作者：Jeang-A. Seo ; Chil-Won Lee ; Myoung-Seon Gong
- 关键词：Blue OLED ; Blue host ; Spiro[benzo[c]fluorene-7 ; 9&prime ; -fluorene] ; Color purity ; Anthracene ; Spirobenzofluorene
- 刊名：Dyes and Pigments
- 出版年：2013
- 出版时间：January, 2013
- 年：2013
- 卷：96
- 期：1
- 页码：211-219
- 全文大小：1351 K
文摘
Blue light-emitting anthracene-based host materials with a spiro[benzo[c]fluorene-7,9¡ä-fluorene] core, 5-(10-(naphthalen-2-yl)anthracen-9-yl)spiro[benzo[c]fluorene-7,9¡ä-fluorene] (NA-SBFF) and 5-(10-(4-(naphthalen-1-yl)phenyl)anthracen-9-yl)spiro[benzo[c]fluorene-7,9¡ä-fluorene] (NPA-SBFF), were designed and synthesized via two-step Suzuki coupling reactions. Introduction of a spiro group into the structure of 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¡ä-diphenyl-N,N¡ä-bis[4-(phenyl-m-tolyl-amino)phenyl]biphenyl-4,4¡ä-diamine (DNTPD)/N,N¡ä-di(1-naphthyl)-N,N¡ä-diphenylbenzidine (NPB)/HOST: Dopant/tris(8-hydroxyquinoline)aluminum (Alq3)/LiF were developed using SBFF-type anthracene derivatives as a host material and N,N,N¡ä,N¡ä-tetraphenylspiro[benzo[c]fluorene-7,9¡ä-fluorene]-5,9-diamine (TPA-SBFF) as a dopant material. A device obtained from NA-SBFF doped with TPA-SBFF showed blue color purity of 0.146 and 0.167, a luminance efficiency of 8.65?cd/A, and an external quantum efficiency >6.01 % at 8.0?V.