A porphyrin pentamer as a bright emitter for NIR OLEDs

Murto, Petri Henrik, 1984 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Wolkeba, Zewdneh Genene, 1983 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Wang, Ergang, 1981 (författare): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2022
2022
Engelska.
Ingår i: Journal of Materials Chemistry C. - : Royal Society of Chemistry (RSC). - 2050-7534 .- 2050-7526. ; 10:15, s. 5929-5933

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Abstract Ämnesord

Stäng

The Luminescence and electroluminescence of an ethyne-Linked zinc(II) porphyrin pentamer have been investigated, by testing blends in two different conjugated polymer matrices, at a range of concentrations. The best results were obtained for blends with the conjugated polymer PIDT-2TPD, at a porphyrin loading of 1 wt%. This host matrix was selected because the excellent overlap between its emission spectrum and the low-energy region of the absorption spectrum of the porphyrin oligomer leads to efficient energy transfer. Thin films of this blend exhibit intense fluorescence in the near-infrared (NIR), with a peak emission wavelength of 886 nm and a photoluminescent quantum yield (PLQY) of 27% in the solid state. Light-emitting diodes (LEDs) fabricated with this blend as the emissive layer achieve average external quantum efficiencies (EQE) of 2.0% with peak emission at 830 nm and a turn-on voltage of 1.6 V. This performance is remarkable for a singlet NIR-emitter; 93% of the photons are emitted in the NIR (lambda > 700 nm), indicating that conjugated porphyrin oligomers are promising emitters for non-toxic NIR OLEDs.

Av författaren/redakt...: Tejerina, Lara; Rapidis, Alexand ...; Rickhaus, Michel; Murto, Petri Hen ...; Wolkeba, Zewdneh ...; Wang, Ergang, 19 ...; visa fler...; Minotto, Alessan ...; Anderson, Harry ...; Cacialli, Franco; visa färre...

Om ämnet

TEKNIK OCH TEKNOLOGIER: TEKNIK OCH TEKNO ...; och Naturresurstekni ...; och Energisystem

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