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 (λ > 700 nm), indicating that conjugated porphyrin oligomers are promising emitters for non-toxic NIR OLEDs.

Tejerina, L., Rapidis, A., Rickhaus, M., Murto, P., Genene, Z., Wang, E., et al. (2022). A porphyrin pentamer as a bright emitter for NIR OLEDs. JOURNAL OF MATERIALS CHEMISTRY. C, 10(15), 5929-5933 [10.1039/d1tc05951c].

A porphyrin pentamer as a bright emitter for NIR OLEDs

Minotto A.;
2022

Abstract

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 (λ > 700 nm), indicating that conjugated porphyrin oligomers are promising emitters for non-toxic NIR OLEDs.
Articolo in rivista - Articolo scientifico
Porphyrin; Near-infrared; OLED;
English
5929
5933
5
Tejerina, L., Rapidis, A., Rickhaus, M., Murto, P., Genene, Z., Wang, E., et al. (2022). A porphyrin pentamer as a bright emitter for NIR OLEDs. JOURNAL OF MATERIALS CHEMISTRY. C, 10(15), 5929-5933 [10.1039/d1tc05951c].
Tejerina, L; Rapidis, A; Rickhaus, M; Murto, P; Genene, Z; Wang, E; Minotto, A; Anderson, H; Cacialli, F
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/368311
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