Spiro-annulated hole-transport material outperforms NPB with higher mobility and stability in organic light-emitting diodes

被引:22
作者
Chen, Hua [1 ]
Gao, Chun-Hong [2 ]
Jiang, Zuo-Quan [2 ]
Zhang, Lei [2 ]
Cui, Lin-Song [2 ]
Ji, Shun-Jun [1 ]
Liao, Liang-Sheng [2 ]
机构
[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Key Lab Organ Synth Jiangsu Prov, Suzhou 215123, Peoples R China
[2] Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Peoples R China
基金
中国国家自然科学基金;
关键词
Spiro-annulated structure; Electro-phosphorescence; Hole-transport material; Crystallization; Organic light-emitting diode; Triphenylamine; DEVICES; LAYER;
D O I
10.1016/j.dyepig.2014.03.006
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A novel multifunctional spiro-annulated fluorene/triarylamine based compound (STNPB) has been designed, synthesized and characterized. It exhibits a high glass transition temperature of 140 degrees C, due to the rigid spiro-configuration molecular structure. According to its suitable energy level and triplet energy (2.34 eV), improved performances, such as lower driving voltage, enhanced device power efficiency, and longer stability, are shown in organic light-emitting diodes with STNPB as the hole-transport material, compared with the ones with the widely used arylamine derivative N,N'-bis(naphthalen-l-y1)-N,N'-bis(phenyl)-benzidine (NPB). Through further studies, it has been demonstrated that the enhanced stability is attributed to suppressed crystallization process as a result of employing STNPB instead of NPB as the hole-transport material. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码:15 / 20
页数:6
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