光学学报, 2010, 30 (6): 1788, 网络出版: 2010-06-07
不同厚度红色有机微腔电致发光器件性能研究
Study on Luminescence Properties of Red Color Microcavity Organic Light Emitting Device with Different Thicknesses
光电子学 有机电致发光器件 光学微腔 氧化铟锡(ITO)厚度 optoelectronics organic light emitting device optical microcavity thickness of ITO
摘要
设计并制作了三个不同厚度的红色有机微腔电致发光器件,器件结构是:Glass/DBR/ITO(厚度分别为150,182,196 nm)/NPB(82 nm)/DCM-Alq3(71 nm)/Mg-Ag(70 nm)。实验结果表明,随着氧化铟锡(ITO)的厚度增加,导致整个微腔器件的腔长度增加,器件的谐振模式(发光峰值)改变,由604 nm红移到640 nm最后到656 nm。CIE色坐标由(0.52,0.48)变至(0.61,0.37)至(0.61,0.38),色纯度逐渐提高。性能较好的是ITO厚度为150 nm的微腔器件,中心波长位于604 nm处,最大亮度达到32008 cd/m2,最大电流效率为3.15 cd/A。这表明ITO厚度对微腔有机电致发光器件的发光性能有着很大影响。
Abstract
Three red microcavity organic electroluminescent devices (MOLED) with different thicknesses were designed and fabricated,the device structure was as follows:Glass/DBR/ITO (thickness of 150,182,and 196 nm respectively) / NPB (82 nm) / DCM-Alq3 (71 nm) / Mg-Ag (70 nm). With the increase of ITO layer,the cavity length of microcavity devices increased accordingly,and the devices' resonant mode (light-emitting peak) changed from 604 nm to 640 nm and then to 656 nm,CIE color coordinate changed from (0.52,0.48) to (0.61,0.37) and then to (0.61,0.38),indicating that the color purity increased gradually. The optimal electroluminescent performance was observed in the sample with the ITO thickness of 150 nm,the emitting center wavelength was 604 nm,the maximum brightness reached 32008 cd/m2,and the maximum current efficiency was 3.15 cd / A. It shows that the ITO thickness of the microcavity light-emitting devices affects the microcavity OLED’s light-emitting properties a lot due to the micro-cavity effect.
张春玉, 肖力光, 陆景彬, 秦莉, 王成, 黄德馨. 不同厚度红色有机微腔电致发光器件性能研究[J]. 光学学报, 2010, 30(6): 1788. Zhang Chunyu, Xiao Liguang, Lu Jingbin, Qin Li, Wang Cheng, Huang Dexin. Study on Luminescence Properties of Red Color Microcavity Organic Light Emitting Device with Different Thicknesses[J]. Acta Optica Sinica, 2010, 30(6): 1788.