A general framework for composition- and process- control of spontaneous orientation polarization in OLEDs

Russell J. Holmes

doi:10.1117/12.2676220

1 October 2023 A general framework for composition- and process- control of spontaneous orientation polarization in OLEDs

Russell J. Holmes

Author Affiliations +

Proceedings Volume PC12659, Organic and Hybrid Light Emitting Materials and Devices XXVII; PC126590A (2023) https://doi.org/10.1117/12.2676220
Event: SPIE Organic Photonics + Electronics, 2023, San Diego, California, United States

Abstract

Spontaneous orientation polarization (SOP) reflects preferential molecular alignment leading to vertical orientation of permanent electric dipole moments (PDMs) and an overall polarization field. In OLEDs, SOP can induce carrier accumulation in the emissive layer, leading to exciton-polaron quenching (even at low-bias) that limits performance. We examine methods to engineer PDM alignment and mitigate the impact of SOP. We consider the behavior of blends of polar materials and the role of thin film processing conditions. The impact of deposition rate and substrate temperature are considered within a rate-temperature-superposition framework, providing a quantitative tool to predict SOP and its impact on OLEDs.

Conference Presentation

Citation Download Citation

Russell J. Holmes "A general framework for composition- and process- control of spontaneous orientation polarization in OLEDs", Proc. SPIE PC12659, Organic and Hybrid Light Emitting Materials and Devices XXVII, PC126590A (1 October 2023); https://doi.org/10.1117/12.2676220

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