Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2015 Feb 12;5:8429. doi: 10.1038/srep08429

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright © 2015, Macmillan Publishers Limited. All rights reserved

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder in order to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/4.0/

PMC Copyright notice

(a) External EL quantum efficiency as a function of luminance for the tested OLEDs. The black, blue and red circles showed the device performance for the OLEDs with TBRb only (FLU-OLED), 4CzIPN-Me only (TADF-OLED) and TBRb:4CzIPN-Me (TAF-OLED), respectively. (b) Normalized EL spectra of the OLEDs with 4CzIPN-Me as emitter (blue, TADF-OLED) and 4CzIPN-Me as assistant dopant (red, TAF-OLED) at 500 cd m⁻². Inset: Current density – voltage characteristics of these devices (coloured accordingly). (c) Operational stability of the tested OLEDs. Initial luminance is set to 1,000 cd m⁻² for all devices. The injected current density is constant at 1.9 mA cm⁻² and 2.1 mA cm⁻² for the OLEDs with 4CzIPN-Me as emitter (TADF-OLED) and as assistant dopant (TAF-OLED), respectively. Inset: Voltage rise curves for the tested devices (coloured accordingly).