Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 47806-047806.doi: 10.1088/1674-1056/22/4/047806

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

Efficiency of blue organic light-emitting diode enhanced by inserting charge control layers into emission region

白娟娟a, 吴晓明a, 华玉林a, 穆雪a, 毕文涛a, 苏跃举a, 焦志强a, 申利莹a, 印寿根a, 郑加金b   

  1. a Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
    b College of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • 收稿日期:2012-04-28 修回日期:2012-11-01 出版日期:2013-03-01 发布日期:2013-03-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60906022 and 60676051), the Natural Science Foundation of Tianjin, China (Grant No. 10JCYBJC01100), the Scientific Developing Foundation of Tianjin Education Commission, China (Grant No. 2011ZD02), the Jiangsu Provincial Natural Science Development Foundation for University, China (Grant No. 09KJB140006), and the Tianjin Natural Science Council (Grant No. 10SYSYJC28100).

Efficiency of blue organic light-emitting diode enhanced by inserting charge control layers into emission region

Bai Juan-Juan (白娟娟)a, Wu Xiao-Ming (吴晓明)a, Hua Yu-Lin (华玉林)a, Mu Xue (穆雪)a, Bi Wen-Tao (毕文涛)a, Su Yue-Ju (苏跃举)a, Jiao Zhi-Qiang (焦志强)a, Shen Li-Ying (申利莹)a, Yin Shou-Gen (印寿根)a, Zheng Jia-Jin (郑加金)b   

  1. a Key Laboratory of Display Materials and Photoelectric Devices, Ministry of Education, Tianjin Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China;
    b College of Optoelectronics Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210003, China
  • Received:2012-04-28 Revised:2012-11-01 Online:2013-03-01 Published:2013-03-01
  • Contact: Wu Xiao-Ming, Hua Yu-Lin E-mail:wxm@mail.nankai.edu.cn; yulinhua@tjut.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 60906022 and 60676051), the Natural Science Foundation of Tianjin, China (Grant No. 10JCYBJC01100), the Scientific Developing Foundation of Tianjin Education Commission, China (Grant No. 2011ZD02), the Jiangsu Provincial Natural Science Development Foundation for University, China (Grant No. 09KJB140006), and the Tianjin Natural Science Council (Grant No. 10SYSYJC28100).

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摘要： We demonstrate high current efficiency of blue fluorescent organic light-emitting diode (OLED) by using the charge control layers (CCLs) based on Alq3. The CCLs that are inserted into the emitting layers (EMLs) could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm2, which is about 2.19 times higher than that of the control device (CD) without the CCL, and the maximal luminance is 19.660 cd/m2 at 12 V. The device shows a good color stability though the green light emitting material Alq3 is introduced as CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq3 species.

关键词: organic light-emitting devices, charge control layer, current efficiency

Abstract: We demonstrate high current efficiency of blue fluorescent organic light-emitting diode (OLED) by using the charge control layers (CCLs) based on Alq3. The CCLs that are inserted into the emitting layers (EMLs) could impede the hole injection and facilitate the electron transport, which can improve the carrier balance and further expand the exciton generation region. The maximal current efficiency of the optimal device is 5.89 cd/A at 1.81 mA/cm2, which is about 2.19 times higher than that of the control device (CD) without the CCL, and the maximal luminance is 19.660 cd/m2 at 12 V. The device shows a good color stability though the green light emitting material Alq3 is introduced as CCL in the EML, but it has a poor lifetime due to the formation of cationic Alq3 species.

Key words: organic light-emitting devices, charge control layer, current efficiency

中图分类号:  (Electroluminescence)

  • 78.60.Fi
85.60.Jb (Light-emitting devices) 78.55.-m (Photoluminescence, properties and materials)