Efficient hybrid organic-inorganic light emitting diodes with self-assembled dipole molecule deposited metal oxides
Efficient hybrid organic-inorganic light emitting diodes with self-assembled dipole molecule deposited metal oxides
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DOI：
10.1063/1.3453759
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发表时间：
2010-06
影响因子：
4
通讯作者：
J. S. Park;B. Lee;Ju Min Lee;Ji‐Seon Kim;S. Kim;M. Song
中科院分区：
文献类型：
--
作者：
J. S. Park;B. Lee;Ju Min Lee;Ji‐Seon Kim;S. Kim;M. Song
研究了自组装偶极分子（SADMs）对杂化有机-无机聚合物发光二极管（HyPLEDs）中ZnO表面的影响。尽管SADM非常薄，但SADM偶极矩的大小和取向有效地影响ZnO的功函数。因此，可以有效地控制ZnO的导带与聚（9，9 ′-二辛基芴）-co-苯并噻二唑的最低未占分子轨道之间的电荷注入势垒，从而显著提高电子注入效率。用负偶极SADM改性的HyPLED表现出增强的器件性能，与未改性的HyPLED相比，其对应于大约四倍。
We investigate the effect of self-assembled dipole molecules (SADMs) on ZnO surface in hybrid organic-inorganic polymeric light-emitting diodes (HyPLEDs). Despite the SADM being extremely thin, the magnitude and orientation of SADM dipole moment effectively influenced the work function of the ZnO. As a consequence, the charge injection barrier between the conduction band of the ZnO and the lowest unoccupied molecular orbital of poly(9,9′-dioctylfluorene)-co-benzothiadiazole could be efficiently controlled resulting that electron injection efficiency is remarkably enhanced. The HyPLEDs modified with a negative dipolar SADM exhibited enhanced device performances, which correspond to approximately a fourfold compared to those of unmodified HyPLEDs.