Heat treatment of organic glasses for high-performance organic light-emitting diodes

Dinara Samigullina; Elisabeth B. Schwarz; Paul-Anton Will; Simone Lenk; Sebastian Reineke

doi:10.1117/12.2621520

30 May 2022 Heat treatment of organic glasses for high-performance organic light-emitting diodes

Dinara Samigullina, Elisabeth B. Schwarz, Paul-Anton Will, Simone Lenk, Sebastian Reineke

Proceedings Volume PC12149, Organic Electronics and Photonics: Fundamentals and Devices III; PC121490A (2022) https://doi.org/10.1117/12.2621520
Event: SPIE Photonics Europe, 2022, Strasbourg, France

Abstract

The organic light-emitting diode (OLED) technology has become the state-of-the-art for mobile displays, is penetrating the TV display sector, and is a light-source with further application potential in the area of automotive lighting, indoor lighting, and wearable and health-monitoring electronics. Recently, J. Rafols-Ribe et al. showed that the efficiency and lifetime of OLEDs can be increased by the layer-by-layer optimization of its fabrication [J. Rafols-Ribe et al., Sci. Adv., 4 (2018)]. This was possible by heating the substrate during deposition. In this work, we investigate how each heated OLED-layer influences the overall device-performance change and compare it to post-annealing treatment by studying the optoelectrical and photoluminescent characteristics of the OLEDs. Additionally, we employ impedance spectroscopy to calculate the giant surface potential of the thin films in an attempt to learn more about the nanoscopic changes of the layer morphologies. Here, different emitter systems, i.e., phosphorescence- or thermally activated delayed fluorescence-based ones, are tested. We find a clear correlation between the surface potential of a transport layer and efficiency of the OLED. Furthermore, we discuss that the efficiency is improved because of a reduced non-radiative decay rate. We show that the in-situ heating increases the efficiency only for OLEDs containing polar layers. These findings contribute to the understanding of the in-situ heating of OLED layers and provide further levers for OLED improvement.

Conference Presentation

Citation Download Citation

Dinara Samigullina, Elisabeth B. Schwarz, Paul-Anton Will, Simone Lenk, and Sebastian Reineke "Heat treatment of organic glasses for high-performance organic light-emitting diodes", Proc. SPIE PC12149, Organic Electronics and Photonics: Fundamentals and Devices III, PC121490A (30 May 2022); https://doi.org/10.1117/12.2621520

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Organic light emitting diodes

Glasses

Heat treatments

Automotive lighting

Dielectric spectroscopy

Electronics

Light sources and illumination

Show All Keywords

Keywords/Phrases

Search In:

Publication Years