paper 140319025350 | PIERS

Submit

PhotonIcs and Electromagnetics Research Symposium,
also known as Progress In Electromagnetics Research Symposium

PIERS Proceedings

Published by The Electromagnetics Academy

Published: 2015-08-28

Formation of Internal Micro-lens-like Structure for Organic Light-emitting Diodes

By

Ching-Ming Hsu,

Ching-Ming Hsu

Southern Taiwan University of Science and Technology, Taiwan, R.O.C.

Bo-Ting Lin,

Bo-Ting Lin

Southern Taiwan University of Science and Technology, Taiwan, R.O.C.

Wei-Ming Lin,

Wei-Ming Lin

Southern Taiwan University of Science and Technology, Taiwan, R.O.C.

Wen-Tuan Wu,

Wen-Tuan Wu

Southern Taiwan University of Science and Technology, Taiwan, R.O.C.

Ying-Xun Zeng

Ying-Xun Zeng

Southern Taiwan University of Science and Technology, Taiwan, R.O.C.

Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)2018-2021

Abstract

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 efficiency was found coverage-ratio independent suggesting that the light extraction is limited by the arrangement of the recesses.

Citation

Ching-Ming Hsu, Bo-Ting Lin, Wei-Ming Lin, Wen-Tuan Wu, and Ying-Xun Zeng, "Formation of Internal Micro-lens-like Structure for Organic Light-emitting Diodes," Proceedings of 2015 Photonics & Electromagnetics Research Symposium, Prague, July 6 - 9，Page(s)2018-2021

References

Download Full Article (PDF ) Wire media illustration

Wire media illustration