Please use this identifier to cite or link to this item:
標題: Efficient non-doped blue light emitting diodes based on novel carbazole-substituted anthracene derivatives
作者: Chen, Y.H.
Lin, S.L.
Chang, Y.C.
Chen, Y.C.
Lin, J.T.
Lee, R.H.
Kuo, W.J.
Jeng, R.J.
關鍵字: Organic light-emitting diodes;Carbazole group;Anthracene derivative;Electroluminescence properties;hole-transporting materials;highly efficient;electroluminescent;devices;organic materials;purity;core
Project: Organic Electronics
期刊/報告no:: Organic Electronics, Volume 13, Issue 1, Page(s) 43-52.
In this study, we synthesized three anthracene derivatives featuring carbazole moieties as side groups -2-tert-butyl-9,10-bis[4-(9-carbazolyl)phenyl]anthracene (Cz(9)PhAnt), 2-tert-butyl-9,10-bis{4-[3,6-di-tert-butyl-(9-carbazolyl)]phenyl}anthracene (tCz(9)PhAnt), and 2-tert-butyl-9,10-bis{4'-[3,6-di-tert-butyl-(9-carbazolyl)]biphenyl-4-yl}anthracene (tCz(9)Ph(2) Ant) - for use in blue organic light emitting devices (OLEDs). The anthracene derivatives presenting rigid and bulky tert-butyl-substituted carbazole units possessed high glass-transition temperatures (220 degrees C). Moreover, the three anthracene derivatives exhibited strong blue emissions in solution, with high quantum efficiencies (91%). We studied the electroluminescence (EL) properties of non-doped OLEDs incorporating these anthracene derivatives, with and without a hole-transporting layer (HTL). OLEDs incorporating an HTL provided superior EL performance than did those lacking the HTL. The highest brightness (6821 cd/m(2)) was that for the tCz(9)PhAnt-based device; the greatest current efficiency (2.1 cd/A) was that for the tCz(9)Ph(2)Ant-based device. The devices based on these carbazole-substituted anthracene derivatives also exhibited high color purity. (C) 2011 Elsevier B. V. All rights reserved.
ISSN: 1566-1199
DOI: 10.1016/j.orgel.2011.10.004
Appears in Collections:化學工程學系所

Show full item record

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.