Development of large area transparent conducting oxides from a combinatorial lead for organic solid state lighting

Dean W. Matson; Charles C. Bonham; James S. Swensen; Liang Wang; Asanga Padmaperuma; Daniel J. Gaspar; Joseph J. Berry; Ajaya K. Sigdel; Christopher W. Gorrie; David S. Ginley

doi:10.1117/12.827281

27 August 2009 Development of large area transparent conducting oxides from a combinatorial lead for organic solid state lighting

Dean W. Matson, Charles C. Bonham, James S. Swensen, Liang Wang, Asanga Padmaperuma, Daniel J. Gaspar, Joseph J. Berry, Ajaya K. Sigdel, Christopher W. Gorrie, David S. Ginley

Author Affiliations +

Proceedings Volume 7415, Organic Light Emitting Materials and Devices XIII; 74150X (2009) https://doi.org/10.1117/12.827281
Event: SPIE Photonic Devices + Applications, 2009, San Diego, California, United States

Abstract

Organic light emitting devices (OLEDs) are projected to provide a low-cost, long-lived, and efficient wide area lighting solution if challenges in reliability, cost, and efficiency can be overcome. Development of new transparent conducting oxides (TCOs) that do not contain indium for use as the anode in bottom-emitting OLEDs can lead to cost savings and provide longer device lifetimes. Indium-free TCOs need to meet or exceed performance targets including high conductivity and visible light transmission, acceptable stability and, for blue or white OLEDs, a high work function to match the deep HOMO of the hole transport material. In this work, we report results from our efforts to scale up sputter deposition on large area substrates (up to hundreds of cm²) of a Ga-doped ZnO TCO having a composition identified using combinatorial methods. We present the results of initial scale-up efforts and evaluate relevant properties for these films. Finally, we have incorporated these materials in the production of OLEDs, and show performance comparisons between devices fabricated on the scaled-up GZO and commercial indium tin oxide (ITO). The results demonstrate that we are able to generate substrates with the appropriate work function to reduce the operating voltage of blue phosphorescent OLEDs compared to commercial ITO. This work function-HOMO energy matching leads to more efficient charge injection into the device hole transport layer.

Citation Download Citation

Dean W. Matson, Charles C. Bonham, James S. Swensen, Liang Wang, Asanga Padmaperuma, Daniel J. Gaspar, Joseph J. Berry, Ajaya K. Sigdel, Christopher W. Gorrie, and David S. Ginley "Development of large area transparent conducting oxides from a combinatorial lead for organic solid state lighting", Proc. SPIE 7415, Organic Light Emitting Materials and Devices XIII, 74150X (27 August 2009); https://doi.org/10.1117/12.827281

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