Star-Shaped Diketopyrrolopyrrole-Zinc Porphyrin that Delivers 900 nm Emission in Light-Emitting Electrochemical Cells
Artikel i vetenskaplig tidskrift, 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.


Mariza Mone

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Shi Tang

Umeå universitet

Petri Henrik Murto

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Birhan Alkadir Abdulahi

Addis Ababa University

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Christian Larsen

Umeå universitet

Jia Wang

Umeå universitet

W. Mammo

Addis Ababa University

L. Edman

Umeå universitet

Ergang Wang

Zhengzhou University

Chalmers, Kemi och kemiteknik, Tillämpad kemi

Chemistry of Materials

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

Vol. 31 23 9721-9728






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