功能层厚度对叠层有机电致发光器件出光性能影响的数值研究

Influence of the functional layer thickness on the light output property of tandem organic light emitting diode: a numerical study

功能层厚度是影响有机电致发光器件出光效率的主要因素之一,故获得不同功能层厚度对器件出光特性的影响规律是制备高性能器件的重要基础.本文基于薄膜光学原理、电偶极子辐射理论及Fabry-Pe′rot微腔原理,建立了结构为glass/ITO/N,N0-bis(naphthalen-1-yl)-N,N0-bis(phenyl)-benzidine(NPB)/tris(8-hydroxyquinoline)aluminum(Alq3)/molybdenum trioxide(MoO3)/NPB/Alq3/Al的叠层有机电致发光器件的光学模型,系统地研究了各个功能层厚度对叠层有机电致发光器件出光强度的影响,得到了功能层厚度对器件出光强度影响的规律.该模型的建立与所获得的结果可对深入了解叠层有机电致发光器件的工作机理以及制备高性能的器件提供一定的帮助.

Based on the principle of thin film optics, the theory of electric dipole radiation, and the principle of Fabry-Pe′rot microcavity, an optical model is built for the tandem organic light emitting diode（OLED） with the structure of Glass /ITO/ N, N0-bis（naphthalen-1-yl）- N, N0-bis（phenyl）-benzidine（NPB）/tris（8-hydroxyquinoli-ne） aluminum（Alq3）/ molybdenum trioxide（MoO3）/NPB/Alq3/LiF/Al. The influence of the functional layer thickness on the light output intensity of device is systematically studied, the laws of light output intensity for tandem OLEDs under different thickness values of functional layer are obtained. This model and the results obtained in this paper can present an in-depth understanding of the working mechanism of tandem OLED and help ones fabricate high efficiency OLED.