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A porphyrin pentame...
A porphyrin pentamer as a bright emitter for NIR OLEDs
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- Tejerina, Lara (author)
- University Of Oxford
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- Rapidis, Alexandros G. (author)
- University College London (UCL)
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- Rickhaus, Michel (author)
- University Of Oxford
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- Murto, Petri Henrik, 1984 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wolkeba, Zewdneh Genene, 1983 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Wang, Ergang, 1981 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Minotto, Alessandro (author)
- University College London (UCL)
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- Anderson, Harry L. (author)
- University Of Oxford
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- Cacialli, Franco (author)
- University College London (UCL)
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(creator_code:org_t)
- 2022
- 2022
- English.
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In: Journal of Materials Chemistry C. - : Royal Society of Chemistry (RSC). - 2050-7534 .- 2050-7526. ; 10:15, s. 5929-5933
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Naturresursteknik -- Energisystem (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Environmental Engineering -- Energy Systems (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
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- ref (subject category)
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- By the author/editor
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Tejerina, Lara
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Rapidis, Alexand ...
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Rickhaus, Michel
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Murto, Petri Hen ...
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Wolkeba, Zewdneh ...
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Wang, Ergang, 19 ...
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show more...
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Minotto, Alessan ...
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Anderson, Harry ...
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Cacialli, Franco
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Atom and Molecul ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Environmental En ...
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and Energy Systems
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
- Articles in the publication
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Journal of Mater ...
- By the university
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Chalmers University of Technology