Synthesis and luminescent properties of pentacene derivatives having a chromophore

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• 作者：Eun-Jee Hwang ; Yeong-Eun Kim ; Chang-Jun Lee and Jong-Wook Park
• 关键词：Red dopant ; Pentacene derivatives ; Electroluminescence ; Photoluminescence
• 刊名：Thin Solid Films
• 出版年：2006
• 出版时间：21 March 2006
• 年：2006
• 卷：499
• 期：1-2
• 页码：185-191
• 全文大小：226 K

文摘

We introduced carbazole and fluorene moieties into pentacene compound for comparing optical and EL properties together. The structure was identified by NMR, IR, UV–Visible spectroscopies and FAB-Mass analysis. 6,13-Bis(9,9-diethyl-9H-fluoren-2-ly)pentacene (DFP) and 6,13-bis(9-ethyl-9H-carbazol-3-yl)pentacene (ECP) showed similar red PL spectrum pattern and their maximum wavelengths appeared at 627 nm and 633 nm. ITO/m-MTDATA/NPB/Alq₃:DFP (5 % )/LiF/Al device showed red EL spectrum at 636 nm with 0.03 cd/A efficiency. ITO/m-MTDATA/NPB/Alq₃:ECP (5 % )/LiF/Al device also showed similar red EL spectrum at same range and higher efficiency (> 0.21 cd/A) than DFPs. We suppose the dopant EL property of pentacene compound can be changed as the electronic property and steric effect of 6,13-substituted moiety in 6- and 13-positions.