| 有机电致发光器件的动态电学特性 |
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| 引用本文： | 张秀龙,杨盛谊,娄志东,侯延冰.有机电致发光器件的动态电学特性[J].物理学报,2007,56(3):1632-1636. |
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| 作者姓名： | 张秀龙 杨盛谊 娄志东 侯延冰 |
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| 作者单位： | 北京交通大学光电子技术研究所，发光与光信息技术教育部重点实验室，北京 100044 |
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| 基金项目： | 国家重点基础研究发展计划(973计划);国家自然科学基金;教育部留学回国人员科研启动基金;北京市自然科学基金;北京市科技新星计划项目 |
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| 摘 要： | 利用交流阻抗谱技术，研究了有机发光二极管ITO/Alq3(90 nm)/Al的载流子传导机理.根据器件对不同频率的响应曲线及其等效电路模型，该器件可看作是由并联的电阻Rp和电容Cp再与电阻Rs串联而成，并根据实验数据求出了Rp，Cp和Rs的数值.实验结果表明器件的载流子传输机理属于指数分布式的陷阱电荷限制电流，其介电弛豫时间随偏压的增加而逐渐减小.
关键词：
3')" href="#">Alq3
陷阱电荷限制电流
交流阻抗谱
有机发光二极管
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| 关 键 词： | Alq3 陷阱电荷限制电流 交流阻抗谱 有机发光二极管 |
| 文章编号： | 1000-3290/2007/56(03)/1632-05 |
| 收稿时间： | 2006-07-10 |
| 修稿时间： | 07 10 2006 12:00AM |
Dynamic electrical characteristics of organic light-emitting diodes |
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| Zhang Xiu-Long,Yang Sheng-Yi,Lou Zhi-Dong,Hou Yan-Bing.Dynamic electrical characteristics of organic light-emitting diodes[J].Acta Physica Sinica,2007,56(3):1632-1636. |
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| Authors: | Zhang Xiu-Long Yang Sheng-Yi Lou Zhi-Dong Hou Yan-Bing |
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| Institution: | Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China |
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| Abstract: | The charge carriers conduction mechanism of single-layer device ITO/Alq_3(90 nm)/Al has been studied by impedance spectroscopy.According to the frequency-dependent response and its equivalent circuit model,the device can be interpreted in terms of the equivalent circuit model of a contact resistance R_s in series with a parallel combination of a capacitance C_p and a resistance R_p,and the values of R_p,C_p and R_s can be found from experimental data.Our experimental results confirmed that the charge carriers conduction mechanism of ITO/Alq_3(90 nm)/Al is trap-charge limited current with exponential distribution,and the dielectric relaxation time of the material decreases dramatically with increasing applied bias voltages. |
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| Keywords: | Alq3 |
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