Open AccessCorrugated organic light-emitting diodes to effectively extract internal modes
Author(s) -
Haowen Liang,
Hao-Chun Hsu,
Jiangning Wu,
Xiao-Feng He,
MaoKuo Wei,
TienLung Chiu,
ChiFeng Lin,
Jiu-Haw Lee,
Jiahui Wang
Publication year - 2019
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.27.00a372
Subject(s) - oled , materials science , quantum efficiency , optoelectronics , optics , grating , surface plasmon polariton , substrate (aquarium) , diode , surface plasmon , diffraction grating , transverse plane , plasmon , layer (electronics) , nanotechnology , oceanography , physics , geology , structural engineering , engineering
We report a corrugated structure to effectively extract the surface plasmon polaritons (SPP) and waveguiding modes in organic light-emitting diodes (OLEDs). This structure is formed by nano-imprint of blazed gratings. To study the optimum extraction condition in terms of grating pitches, we compare the light extraction efficiency of corrugated OLEDs with three kinds of pitches, showing a 42.00% external quantum efficiency (EQE) enhancement ratio with this internal structure. Due to the transfer of SPP and waveguiding modes into substrate mode, the EQE enhancement ratio can be further pushed to 103.02% by attaching a macrolens. The simulation verifies the experimental results and shows the extraction mechanism of the corrugated structure towards transverse electric (TE) and transverse magnetic (TM) waves. We foresee that this method is able to enhance the optical efficiency of devices for both mass-production OLED lighting and display in a cost-effective way.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom