| 利用电子传输层掺杂改善有机发光器件的效率 |
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| 引用本文： | 杨惠山,程加力,赵毅,侯晶莹,刘式墉.利用电子传输层掺杂改善有机发光器件的效率[J].光子学报,2004,33(11):1364-1366. |
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| 作者姓名： | 杨惠山 程加力 赵毅 侯晶莹 刘式墉 |
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| 作者单位： | 吉林大学,集成光电子学国家重点实验室,吉林,长春,130023;泉州师范学院,物理系,福建,泉州,362000;吉林大学,集成光电子学国家重点实验室,吉林,长春,130023 |
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| 基金项目： | 国家自然科学基金资助项目(60376028,60207003) |
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| 摘 要： | 利用BCP掺杂到电子传输层Alq中,在掺杂层中阻挡了空穴的迁移,调整了空穴和电子的平衡,将激子有效地限制在发光层中发光,从而增加有机电致发光器件的效率.器件的最大电流效率在外加电压9 V时达到4.1 cd/A(掺杂浓度8%时),与一般未掺杂器件相比效率提高了2倍多.同时也减少空穴到达阴极,而减少发光淬灭.
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| 关 键 词： | 有机电致发光 掺杂 效率 |
| 收稿时间： | 2003-10-28 |
| 修稿时间： | 2003年10月28 |
Improved Efficiency of Organic Light-emitting Devices Utilizing Doped in the Electron-transporting Layer |
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| Yang Huishan ,Cheng Jiali ,Zhao Yi ,Hou Jingying ,Liu Shiyong National Laboratory of Integrate Optoelectronics,Jilin University,Changchun.Improved Efficiency of Organic Light-emitting Devices Utilizing Doped in the Electron-transporting Layer[J].Acta Photonica Sinica,2004,33(11):1364-1366. |
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| Authors: | Yang Huishan Cheng Jiali Zhao Yi Hou Jingying Liu Shiyong National Laboratory of Integrate Optoelectronics Jilin University Changchun |
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| Institution: | Yang Huishan 1,2,Cheng Jiali 1,Zhao Yi 1,Hou Jingying 1,Liu Shiyong 1 1 National Laboratory of Integrate Optoelectronics,Jilin University,Changchun 130023 2 Department of Physics,Quanzhou Normal College,Quanzhou 362000 |
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| Abstract: | An organic light emitting devices (OLED) with improved efficiency utilizing doped electron transporting layer (ETL) has been fabricated. The BCP was doped into Alq as an ETL and hole blocking layer. The OLED with BCP doped ETL achieved more charge balance than the usual one owing to the BCP dopant, which does not emit itself but adjust the charge balance in OLEDs by obstructing the passage of the redundant holes to the cathode and confining the exciton in the emitting zone, therefore ,resulting in the increased current efficiency of OLED. The cell with 5% BCP doping concentration has the high current efficiency of 4.1 cd/A at 9 V,which is more than twice than that of the undoped one. This is an effective method to improve the current efficiency of OLEDS |
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| Keywords: | Organic light-emitting devices Doping Efficiency |
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