High-efficiency and stable blue hyperfluorescence organic light-emitting diode

Chin-Yiu Chan; Yi-Ting Lee; Youichi Tsuchiya; Hajime Nakanotani; Chihaya Adachi

doi:10.1117/12.2632333

3 October 2022 High-efficiency and stable blue hyperfluorescence organic light-emitting diode

Chin-Yiu Chan, Yi-Ting Lee, Youichi Tsuchiya, Hajime Nakanotani, Chihaya Adachi

Proceedings Volume 12208, Organic and Hybrid Light Emitting Materials and Devices XXVI; 1220803 (2022) https://doi.org/10.1117/12.2632333
Event: SPIE Organic Photonics + Electronics, 2022, San Diego, California, United States

Abstract

Organic light-emitting diodes (OLEDs) are a promising light-emitting technology useful for various display applications^1,2. Despite great progress in this field^3-12, there is an ongoing challenge to realize high performance blue OLEDs with efficiency, good color purity, and device lifetime. Here, we report pure-blue (CIEx,y color coordinates of [0.13, 0.16]) OLEDs with high-efficiency (external quantum efficiency of 32 % at 1000 cd m^–2 ), narrow-emission (full width half maximum of 19 nm), and good stability (LT95 of 18 hours at an initial luminance of 1000 cd m–2 ). The design is based on a two-unit stacked tandem hyperfluorescence (HF)-OLED with an improved singlet-excited energy transfer process from a sky-blue TADF assistant dopant (AD) (HDT-1) to a pure-blue terminal emitter (TE) (v-DABNA). Furthermore, the effect of dopant concentration of terminal emitter on the device performance of hyperfluorescence OLEDs is studied. Device shows a better color purity when dopant concentration is increased. On the other hand, new hyperfluorescence OLEDs have been fabricated, in which device stability has been extended with a new molecular design of TE.

Conference Presentation

Citation Download Citation

Chin-Yiu Chan, Yi-Ting Lee, Youichi Tsuchiya, Hajime Nakanotani, and Chihaya Adachi "High-efficiency and stable blue hyperfluorescence organic light-emitting diode", Proc. SPIE 12208, Organic and Hybrid Light Emitting Materials and Devices XXVI, 1220803 (3 October 2022); https://doi.org/10.1117/12.2632333

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