| 反向偏压下的异质结聚合物电致发光机理分析 |
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| 引用本文： | 谭海曙,姚建铨,王鹏,谢洪泉. 反向偏压下的异质结聚合物电致发光机理分析[J]. 四川师范大学学报(自然科学版), 2002, 25(4): 380-385 |
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| 作者姓名： | 谭海曙 姚建铨 王鹏 谢洪泉 |
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| 作者单位： | 佛山科学技术学院,电子系,广东,佛山,528000;天津大学精仪学院,光电子信息工程系,天津,300072;天津大学精仪学院,光电子信息工程系,天津,300072;华中科技大学,化学系,湖北,武汉,430074 |
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| 基金项目： | 国家自然科学基金资助项目 (6960 60 0 2 ),国家自然科学基金高技术探索主题项目 (699880 0 3 ) |
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| 摘 要： | 成功制备了结构为ITO/PDDOPV/PPQ/Al的异质结聚合物发光二极管 ,其中PDDOPV是一种空穴型聚合物材料而PPQ是一种电子型聚合物材料 .该器件在正反向偏压下均可发光 .在正向偏压下的光发射主要来自PDDOPV ,但在反向偏压下的光发射则包括来自PPQ的蓝光发射和PDDOPV的黄光发射 .蓝光强度与黄光强度的比值随着反向偏压的增加而增加 .提出了加速电场的概念 ,并在此基础上从理论上分析了蓝光强度与黄光强度的比值随反向偏压的增加而增加的发光机理 ,指出了决定这一比值的主要因素 .
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| 关 键 词： | 反向偏压 聚合物发光二极管 电致发光 双峰发射 发光机理 |
| 文章编号： | 1001-8395(2002)04-0381-05 |
| 修稿时间： | 2002-04-08 |
Electroluminescence of Polymer Heterojunction under Negative Bias Voltage |
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| TAN Hai shu ,,YAO Jian quan ,WANG Peng ,XIE Hong quan. Electroluminescence of Polymer Heterojunction under Negative Bias Voltage[J]. Journal of Sichuan Normal University(Natural Science), 2002, 25(4): 380-385 |
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| Authors: | TAN Hai shu YAO Jian quan WANG Peng XIE Hong quan |
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| Affiliation: | TAN Hai shu 1,2,YAO Jian quan 2,WANG Peng 2,XIE Hong quan 3 |
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| Abstract: | Light emitting diodes based on heterojunction with structure ITO/PDDOPV/PPQ/Al have been successfully fabricated, in which PDDOPV is a hole type polymer and PPQ an electron type polymer. Light emission is observed under both positive and negative bias voltage. Light emission under positive bias voltage mainly is originated from PDDOPV, but light emission under negative bias voltage includes blue and yellow light emissions which are from PPQ and PDDOPV, respectively. The ratio of intensity of blue to yellow emission increases with the growth of negative bias voltage. In other words, the emitting color is dependent on the voltage, which is a promising property to realize colorful display. The light emitting mechanism under negative bias voltage is analyzed. |
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| Keywords: | Negative bias voltage Polymer light emitting diode Electroluminescence Two peak emission Light emitting mechanism |
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