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Multi-resonant thermally-activated delayed fluorescence (MR-TADF) emitters for blue organic light-emitting transistors (OLETs)
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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en
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Materials Advances, Volume 7, issue 8, pp. 4226-4233
Abstract
Thermally-activated delayed fluorescence (TADF) molecules are a promising class of emitters for organic optoelectronic devices, potentially more efficient than phosphorescent emitters. Among them, multi-resonant TADF (MR-TADF) emitters are designed to enhance the rigid molecular structure, leading to a narrow-band emission below 50 nm. In this work, we studied a multi-resonant TADF material, t-DABNA, embedded in DPEPO as a blue emissive layer in organic light-emitting transistors (OLETs), a device platform that combines into a single device the switching capability of a transistor and the light emission of an organic light-emitting diode. We investigated the effect of different t-DABNA concentrations within the emissive blend in a multilayer heterostructure, and we analyzed our experimental results in terms of optical, morphological, and optoelectronic properties of the blend itself. We found that emitter content of approximately 10% leads to the highest external quantum efficiency (0.18%) in the devices and with a narrow band emission as low as 30 nm. This work offers key insights into the use of MR-TADF emitter molecules within organic field-effect light-emitting devices.
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Publisher Copyright: This journal is © The Royal Society of Chemistry, 2026
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Fanourakis, G, Azari, A & Soldano, C 2026, 'Multi-resonant thermally-activated delayed fluorescence (MR-TADF) emitters for blue organic light-emitting transistors (OLETs)', Materials Advances, vol. 7, no. 8, pp. 4226-4233. https://doi.org/10.1039/d5ma01444a