Tuning charge balance in PHOLEDs with ambipolar host materials to achieve high efficiency

Asanga B. Padmaperuma; Philip K. Koech; Lelia Cosimbescu; Evgueni Polikarpov; James S. Swensen; Neetu Chopra; Franky So; Linda S. Sapochak; Daniel J. Gaspar

doi:10.1117/12.826905

28 August 2009 Tuning charge balance in PHOLEDs with ambipolar host materials to achieve high efficiency

Asanga B. Padmaperuma, Philip K. Koech, Lelia Cosimbescu, Evgueni Polikarpov, James S. Swensen, Neetu Chopra, Franky So, Linda S. Sapochak, Daniel J. Gaspar

Author Affiliations +

Proceedings Volume 7415, Organic Light Emitting Materials and Devices XIII; 74150H (2009) https://doi.org/10.1117/12.826905
Event: SPIE Photonic Devices + Applications, 2009, San Diego, California, United States

Abstract

The efficiency and stability of blue organic light emitting devices (OLEDs) continue to be a primary roadblock to developing organic solid state white lighting. For OLEDs to meet the high power conversion efficiency goal, they will require both close to 100% internal quantum efficiency and low operating voltage in a white light emitting device.1 It is generally accepted that such high quantum efficiency, can only be achieved with the use of organometallic phosphor doped OLEDs. Blue OLEDs are particularly important for solid state lighting. The simplest (and therefore likely the lowest cost) method of generating white light is to down convert part of the emission from a blue light source with a system of external phosphors.2 A second method of generating white light requires the superposition of the light from red, green and blue OLEDs in the correct ratio. Either of these two methods (and indeed any method of generating white light with a high color rendering index) critically depends on a high efficiency blue light component.3

Citation Download Citation

Asanga B. Padmaperuma, Philip K. Koech, Lelia Cosimbescu, Evgueni Polikarpov, James S. Swensen, Neetu Chopra, Franky So, Linda S. Sapochak, and Daniel J. Gaspar "Tuning charge balance in PHOLEDs with ambipolar host materials to achieve high efficiency", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74150H (28 August 2009); https://doi.org/10.1117/12.826905

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