Emitter apodization dependent angular luminance enhancement of microlens-array film attached organic light-emitting devices.
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.
Chen
Kuan-Yu
KY
Graduate Institute of Photonics and Optoelectronics and Department of Electrical Engineering, National Taiwan University, Taipei, 10617, Taiwan.
Chang
Yung-Ting
YT
Ho
Yu-Hsuan
YH
Lin
Hoang-Yan
HY
Lee
Jiun-Haw
JH
Wei
Mao-Kuo
MK
D004867:Equipment Design; D019544:Equipment Failure Analysis; D007909:Lenses; D008029:Lighting / Q000295:instrumentation*; D008163:Luminescent Measurements / Q000295:instrumentation*; D008567:Membranes, Artificial; D008904:Miniaturization; D009930:Organic Chemicals / Q000737:chemistry*
D008567:Membranes, Artificial; D009930:Organic Chemicals