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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 化學工程學系所 > 依資料類型分類 > 期刊論文 >  Efficient non-doped blue light emitting diodes based on novel carbazole-substituted anthracene derivatives

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/128943

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
日期: 2012
Issue Date: 2012-12-07 15:16:20 (UTC+8)
關連: Organic Electronics, Volume 13, Issue 1, Page(s) 43-52.
摘要: 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.
Relation: Organic Electronics
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