Chen Kuan-Yu, Chang Yung-Ting, Ho Yu-Hsuan, Lin Hoang-Yan, Lee Jiun-Haw, Wei Mao-Kuo
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
Opt Express. 2010 Feb 15;18(4):3238-43. doi: 10.1364/OE.18.003238.
Taking organic emitter apodization calculated from electromagnetic theory as input, the angular luminance enhancement of a microlens-array-film (MAF) attached OLED (organic light-emitting device) can be further evaluated by ray-tracing approach. First, we assumed artificial emitters and revealed that not every OLED with MAF has luminance enhancement. Then, the OLEDs of different Alq(3) thickness were fabricated and their angular luminance measurement validated simulation results. Mode analyses for different layers were performed to estimate the enhancement potential of the MAF attached devices. In conclusion, the organic emitters with higher off-axis-angle luminous intensity cause lower out-coupling efficiency but gain higher enhancement after the MAF attached.
以根据电磁理论计算得出的有机发光体切趾作为输入，通过光线追踪方法可以进一步评估附着有微透镜阵列薄膜（MAF）的有机发光二极管（OLED）的角亮度增强情况。首先，我们假定了人工发光体，并发现并非每个附着有MAF的OLED都有亮度增强。然后，制作了不同厚度Alq(3)的OLED，并通过其角亮度测量验证了模拟结果。对不同层进行了模式分析，以估计附着有MAF的器件的增强潜力。总之，离轴角发光强度较高的有机发光体导致较低的外耦合效率，但在附着MAF后获得更高的增强效果。
