Extracting Light from Polymer Light‐Emitting Diodes Using Stamped Bragg Gratings | Zendy

Ziebarth J. M. | Zendy; Saafir A. K. | Zendy; Fan S. | Zendy; McGehee M. D. | Zendy

AI Assistant Blog Pricing

Home ZAIA Blog

Premium

Extracting Light from Polymer Light‐Emitting Diodes Using Stamped Bragg Gratings

Author(s) -

Ziebarth J. M.,

Saafir A. K.,

Fan S.,

McGehee M. D.

Publication year - 2004

Publication title -

advanced functional materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 6.069

H-Index - 322

eISSN - 1616-3028

pISSN - 1616-301X

DOI - 10.1002/adfm.200305070

Subject(s) - materials science , optoelectronics , light emitting diode , optics , lithography , grating , waveguide , diode , absorption (acoustics) , coupling (piping) , oled , bragg's law , fiber bragg grating , layer (electronics) , diffraction , nanotechnology , wavelength , physics , metallurgy , composite material

In this paper, we describe a method for increasing the external efficiency of polymer light‐emitting diodes (LEDs) by coupling out waveguided light with Bragg gratings. We numerically model the waveguide modes in a typical LED structure and demonstrate how optimizing layer thicknesses and reducing waveguide absorption can enhance the grating outcoupling. The gratings were created by a soft‐lithography technique that minimizes changes to the conventional LED structure. Using one‐dimensional and two‐dimensional gratings, we were able to increase the forward‐directed emission by 47 % and 70 %, respectively, and the external quantum efficiency by 15 % and 25 %.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here

Accelerating Research