| 采用复合空穴注入层提高有机电致发光器件的性能 |
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| 引用本文： | 刘爱华,杨利营. 采用复合空穴注入层提高有机电致发光器件的性能[J]. 发光学报, 2012, 33(4): 422-427. DOI: 10.3788/fgxb20123304.0422 |
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| 作者姓名： | 刘爱华 杨利营 |
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| 作者单位： | 1. 天津理工大学 理学院, 天津 300384;2. 天津理工大学 显示材料与光电器件省部共建教育部重点实验室, 天津 300384;3. 天津市光电显示材料与器件重点实验室, 天津 300384 |
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| 基金项目： | 国家自然科学基金(50503017);天津市自然科学基金(07JCYBJC03200);天津市“材料物理与化学”重点学科资助项目 |
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| 摘 要： | 制备了以Ag/SAM/m-MTDATA为复合空穴注入层的NPB/Alq3双层异质结发光器件,研究了器件的性能并与传统的器件进行了对比。考察了银膜厚度的变化对器件性能的影响。研究了光谱窄化以及微腔效应对器件的影响。研究结果表明:在ITO表面制备4-FTP自组装单分子膜修饰的5 nm厚的金属银膜,可以在保持阳极透明性的基础上,增强空穴的注入,改善界面的形貌,进而提高器件性能。制备的ITO/Ag/SAM/m-MTDATA/NPB/Alq3/LiF/Al器件的启亮电压为4 V,最 大电流效率为6.9 cd/A, 最大亮度为34 680 cd/m2(12 V);优于以ITO为阳极的对比器件(25 300 cd/m2 @12 V)。
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| 关 键 词： | 自组装单分子膜 阳极 有机电致发光器件 微腔效应 电流效率 |
| 收稿时间： | 2011-12-04 |
Improved Performance of Organic Light Emitting Diodes Using Combined Hole-injecting Layer |
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| LIU Ai-hua,YANG Li-ying. Improved Performance of Organic Light Emitting Diodes Using Combined Hole-injecting Layer[J]. Chinese Journal of Luminescence, 2012, 33(4): 422-427. DOI: 10.3788/fgxb20123304.0422 |
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| Authors: | LIU Ai-hua YANG Li-ying |
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| Affiliation: | 1. College of Science, Tianjin University of Technology, Tianjin 300384, China;2. Key Laboratory of Display Materials & Photoelectric Devices (Ministry of Education), Tianjin University of Technology, Tianjin 300384, China;3. Tianjin Key Laboratory for Photoelectric Materials & Devices, Tianjin 300384, China |
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| Abstract: | A double layer NPB/Alq3 heterojunction organic light emitting device using Ag/4-FTP(SAM)/m-MTDATA as combined hole-injecting layer was fabricated.The device performance was studied and compared with the control device.The effect of the Ag layer thickness on the device performance is also investigated.The variation of the spectral narrowing and intensity enhancement can be explained with microcavity effects.The results revealed that indium tin oxide(ITO) anode modified with Ag(5 nm)/ 4-FTP(SAM) demonstrated good transparency,enhanced hole injection ability and smooth interface morphology,which result in an improved device performance.The highest luminance of 34 680 cd/m2 at 12 V and a luminous efficiency of 6.9 cd/A were achieved for the device with the structure of ITO/Ag/4-FTP(SAM)/m-MTDATA/NPB/Alq3/LiF/Al.However,the control device showed 25 300 cd/m2 at the same bias. |
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| Keywords: | self-assembled monolayer anode organic light-emitting devices microcavity effects current efficiency |
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