Light extraction for a doubly resonant cavity organic LED: the RC2LED

Peter Vandersteegen; Saso Mladenovski; Volker van Elsbergen; Georg Gartner; Peter Bienstman; Kristiaan Neyts; Roel Baets

doi:10.1117/12.732524

16 October 2007 Light extraction for a doubly resonant cavity organic LED: the RC²LED

Peter Vandersteegen, Saso Mladenovski, Volker van Elsbergen, Georg Gartner, Peter Bienstman, Kristiaan Neyts, Roel Baets

Author Affiliations +

Proceedings Volume 6655, Organic Light Emitting Materials and Devices XI; 665513 (2007) https://doi.org/10.1117/12.732524
Event: Photonic Devices + Applications, 2007, San Diego, California, United States

Abstract

The RC²LED is a substrate emitting OLED which has three additional interference layers between the ITO electrode and the glass substrate. This creates two resonant optical cavities. The RC²LED has 2 resonant optical cavities. The first cavity is also present in regular devices and is formed by metal/organic layers/ITO. The second cavity is formed by 3 additional layers: a high refractive index layer (Nb₂O₅), a low refractive index layer (SiO₂) and a high refractive index layer (Nb₂O₅). The additional layers introduce a strong wavelength dependent improvement of the extraction efficiency compared to the OLED without the additional layers. Our simulations show an improvement of the extraction efficiency of over 70% over a wavelength range of 75 nm compared to an OLED without the 3 layers. Light extraction is worse compared to the reference OLED for wavelengths outside this wavelength range. the when compared to the OLED. This improvement has been experimentally verified for a green OLED with an emission between 500nm and 650 nm. A numerical study shows a relative improvement of 10% for the luminous power efficiency of a 3 color white OLED with the additional layers. The emitted white corresponds with the light emitted by illuminant A. The WOLED has been composed of a fluorescent blue emitter, green and red phosphorescent emitters.

Citation Download Citation

Peter Vandersteegen, Saso Mladenovski, Volker van Elsbergen, Georg Gartner, Peter Bienstman, Kristiaan Neyts, and Roel Baets "Light extraction for a doubly resonant cavity organic LED: the RC²LED", Proc. SPIE 6655, Organic Light Emitting Materials and Devices XI, 665513 (16 October 2007); https://doi.org/10.1117/12.732524

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available