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
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
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
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.
中图分类号: (Electroluminescence)