Star-Shaped Diketopyrrolopyrrole-Zinc Porphyrin that Delivers 900 nm Emission in Light-Emitting Electrochemical Cells
Journal article, 2019

The development and application of a deep near-infrared (NIR) emitting star-shaped diketopyrrolopyrrole-Zn-porphyrin compound, ZnP(TDPP)4, is reported. The structure, conjugation, and planarity of the porphyrin compound were carefully tuned by molecular design, which resulted in a low-energy photoluminescence peak at 872 nm. The ZnP(TDPP)4 compound was employed as the emissive guest in light-emitting electrochemical cells (LECs), which also comprised the conjugated polymer poly[1,3-bis(2-ethylhexyl)-5-(5-(6-methyl-4,8-bis(5-(tributylsilyl)thiophen-2-yl)benzo[1,2-b:4,5-b′]dithiophen-2-yl)thiophen-2-yl)-7-(5-methylthiophen-2-yl)-4H,8H-benzo[1,2-c:4,5-c′]dithiophene-4,8-dione] (PBDTSi-BDD) as the majority host, an ionic liquid as the electrolyte, and two air-stabile electrodes. These systematically optimized host-guest LECs featured a peak electroluminescence at 900 nm, which was delivered at a significant radiance of 36 μW/cm2 and at a low drive voltage of 3.8 V. It is notable that this is the most redshifted NIR emission attained from an LEC device to date, and as such, this work introduces Zn porphyrins as a sustainable and tunable option for emerging emissive NIR applications.

Author

Mariza Mone

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Ergang Wang Group

Shi Tang

Umeå University

Petri Henrik Murto

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Ergang Wang Group

Birhan Alkadir Abdulahi

Addis Ababa University

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Ergang Wang Group

Christian Larsen

Umeå University

Jia Wang

Umeå University

W. Mammo

Addis Ababa University

L. Edman

Umeå University

Ergang Wang

Zhengzhou University

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry, Ergang Wang Group

Chemistry of Materials

0897-4756 (ISSN) 1520-5002 (eISSN)

Vol. 31 23 9721-9728

Subject Categories

Chemical Engineering

Materials Chemistry

DOI

10.1021/acs.chemmater.9b03312

More information

Latest update

1/10/2020