Formation of Internal Micro-lens-like Structure for Organic Light-emitting Diodes
Micro-lens-like structures fabricated on indium tin oxide were employed to promote light extraction efficiency of an organic light-emitting diode (OLED). Four array patterns with coverage ratios of 7.9%, 14.1%, 20.9% and 27.7% were examined. The current efficiency of OLED was enhanced by 26.5% for the 14.1% recessed device (4.8 cd/A) compared with the planar device (3.8 cd/A). The improved current efficiency was attributed to the additional light-emitting area generated on the recess wall as well as the light scattering/deflection effects on the recessed surfaces. The current effects was found coverage-ratio independent suggesting that the light extraction is limited by the arrangement of the recesses.
C.M.Hsu Y.X.Zeng B.T.Lin W.M.Lin W.T.Wu
Department of Electro-Optical Engineering, Southern Taiwan University of Science and Technology 1, Nan-Tai St., Yung-Kang District, Tainan City 710, Taiwan, R.O.C.
国际会议
Progress in Electromagnetics Research Symposium 2014(2014年电磁学研究新进展学术研讨会)
广州
英文
2018-2021
2014-08-01（万方平台首次上网日期，不代表论文的发表时间）