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| Numerical analysis of the mechanism of carrier transport in organic light—emitting devces | |
| 引用本文： | 彭应全,张福甲,台夕市,何锡源,张旭. Numerical analysis of the mechanism of carrier transport in organic light—emitting devces[J]. 中国物理, 2002, 11(10): 1076-1081. DOI: 10.1088/1009-1963/11/10/320 |
| 作者姓名： | 彭应全 张福甲 台夕市 何锡源 张旭 |
| 作者单位： | (1)Department of Physics, Gansu Institute of Education, Lanzhou 730030, China; (2)School of Chemistry and Chemical Industry, Lanzhou University, Lanzhou 730000, China; (3)School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China |
| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No 60076023). |
| 摘 要： | The mechanism of carrier transport in organic light-emitting devices is numerically studied,on the basis of trappedcharge-limited conduction with an exponential trap distribution.The spatial distributions of the electrical potential,field and carrier density in the organic layer are calculated and analysed.Most carriers are distributed near the two electrodes,only a few of them are distributed over the remaining part of the orgaic layer,The carriers are accumulated near the electrodes,and the remaining region is almost exhausted of carriers.When the characteristic energy of trap distribution is greater than 0.3eV.it leads to a reduction of current density.In order to improve the device efficiency,organic materials with minor traps and low characteristic energy should be chosen.The diffusion current is the dominant component near the injection electrode.whereas the drift current dominates the remaining region of the organic layer. |
| 关 键 词： | 有机光发射器件 载流子迁移机制 数字分析 |
| 收稿时间： | 2002-04-08 |
Numerical analysis of the mechanism of carrier transport in organic light-emitting devices |
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| Peng Ying-Quan,Zhang Fu-Ji,Tai Xi-Shi,He Xi-Yuan and Zhang Xu. Numerical analysis of the mechanism of carrier transport in organic light-emitting devices[J]. Chinese Physics, 2002, 11(10): 1076-1081. DOI: 10.1088/1009-1963/11/10/320 | |
| Authors: | Peng Ying-Quan Zhang Fu-Ji Tai Xi-Shi He Xi-Yuan Zhang Xu |
| Affiliation: | School of Physical Science and Technology, Lanzhou University, Lanzhou 730000, China; School of Chemistry and Chemical Industry, Lanzhou University, Lanzhou 730000, China; Department of Physics, Gansu Institute of Education, Lanzhou 730030, China |
| Abstract: | The mechanism of carrier transport in organic light-emitting devices is numerically studied, on the basis of trapped-charge-limited conduction with an exponential trap distribution. The spatial distributions of the electrical potential, field and carrier density in the organic layer are calculated and analysed. Most carriers are distributed near the two electrodes, only a few of them are distributed over the remaining part of the organic layer. The carriers are accumulated near the electrodes, and the remaining region is almost exhausted of carriers. When the characteristic energy of trap distribution is greater than 0.3 eV, it leads to a reduction of current density. In order to improve the device efficiency, organic materials with minor traps and low characteristic energy should be chosen. The diffusion current is the dominant component near the injection electrode, whereas the drift current dominates the remaining region of the organic layer. |
| Keywords: | organic light-emitting device carrier transport numerical analysis |
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