Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 25, 2020
Previous Article Next Article

An 850 nm pure near-infrared emitting iridium complex for solution-processed organic light-emitting diodes

Author affiliations

Abstract

High-performance pure near-infrared organic light-emitting materials and devices with full emission over 700 nm are still rare, though urgently needed. Iridium(III) complexes have been proven to be an important class of NIR emitters. Herein, we report a new NIR homoleptic Ir(III) complex, tris[1,4-di(5-n-octylthiophen-2-yl)benzo[g]phthalazine] iridium(III) (Ir(dotbpa)3), with full emission beyond 700 nm with an iridium mass content as low as 10 wt%. Thanks to the introduction of flexible n-octyl groups, Ir(dotbpa)3 shows greatly improved solubility and excellent solution-processability in comparison with its counterpart Ir(dtbpa)3. By utilizing a multifunctional host, solution-processed NIR-OLEDs were fabricated with a simple structure of only three organic layers and they demonstrated a pure NIR emission starting from 725 nm and a peak at 850 nm with the maximum external quantum efficiency of 0.17%, which makes them the first example of pure NIR-OLEDs based on Ir(III) emitters.

Graphical abstract: An 850 nm pure near-infrared emitting iridium complex for solution-processed organic light-emitting diodes

Back to tab navigation

Supplementary files

Article information


Submitted
30 Mar 2020
Accepted
11 May 2020
First published
12 May 2020

J. Mater. Chem. C, 2020,8, 8484-8492
Article type
Paper

An 850 nm pure near-infrared emitting iridium complex for solution-processed organic light-emitting diodes

Y. Zhang, Q. Li, M. Cai, J. Xue and J. Qiao, J. Mater. Chem. C, 2020, 8, 8484
DOI: 10.1039/D0TC01614D

Social activity

Search articles by author

Spotlight

Advertisements