Projects per year
Abstract
The development of luminescent organic radicals has resulted in materials with excellent optical properties for near-infrared emission. Applications of light generation in this range span from bioimaging to surveillance. Although the unpaired electron arrangements of radicals enable efficient radiative transitions within the doublet-spin manifold in organic light-emitting diodes, their performance is limited by non-radiative pathways introduced in electroluminescence. Here we present a host–guest design for organic light-emitting diodes that exploits energy transfer with up to 9.6% external quantum efficiency for 800 nm emission. The tris(2,4,6-trichlorophenyl)methyl-triphenyl-amine radical guest is energy-matched to the triplet state in a charge-transporting anthracene-derivative host. We show from optical spectroscopy and quantum-chemical modelling that reversible host–guest triplet–doublet energy transfer allows efficient harvesting of host triplet excitons.
Original language | English |
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Pages (from-to) | 905-912 |
Number of pages | 8 |
Journal | Nature Photonics |
Volume | 18 |
Issue number | 9 |
DOIs | |
Publication status | Published - Sept 2024 |
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Dive into the research topics of 'Efficient near-infrared organic light-emitting diodes with emission from spin doublet excitons'. Together they form a unique fingerprint.Projects
- 1 Finished
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Equipment renewal for the Consortium des Equipements de Calcul Intensif (CECI)
Bontempi, G. (PI), CHAMPAGNE, B. (CoPI), Geuzaine , C. (CoPI), RIGNANESE, G. M. (CoPI) & Lazzaroni, R. (CoPI)
1/01/22 → 31/12/23
Project: Research
Equipment
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High Performance Computing Technology Platform
Champagne, B. (Manager)
Technological Platform High Performance ComputingFacility/equipment: Technological Platform
Press/Media
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Recent Studies from University of Cambridge Add New Data to Electronics (Efficient Near-infrared Organic Light-emitting Diodes With Emission From Spin Doublet Excitons)
16/07/24
1 item of Media coverage
Press/Media: Expert Comment