A hybrid molecular sensitizer for triplet fusion upconversion

doi:10.1016/j.cej.2021.131282

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DOI Доступ к ресурсу на сайте издателя			10.1016/j.cej.2021.131282

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Title: A hybrid molecular sensitizer for triplet fusion upconversion
Creator: Wang, Xinyu
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Wang, Xing
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Baryshnikov, Gleb V.
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Valiev, Rashid R.
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Fan, Rongwei
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Lu, Songtao
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Ågren, Hans
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Chen, Guanying
Date: 2021
DOI: 10.1016/j.cej.2021.131282
Description: Triplet fusion upconversion is useful for a broad spectrum of applications ranging from solar cells, photoredox catalysis, to biophotonics applications, especially in the near-infrared (NIR,>700 nm) range. This upconverting system typically demands efficient conversion of spin-singlet harvested energy through intersystem crossing to spin-triplet states, accessible only in rare metallic-coordinating macrocycle compounds or heavy-metal-containing semiconductor quantum dots for triplet sensitization. Herein, we describe an organic–inorganic system for NIR-to-visible triplet fusion upconversion, interfacing commonly-seen, non-metallic, infrared dyes (IR806, IR780, indyocynine green, and CarCl) and lanthanide nanocrystal (sodium ytterbium fluoride) as a hybrid molecular sensitizer, which extracts molecular spin-singlet energy to nanocrystal-enriched ytterbium dopants at ~48% efficiency (IR806, photoexciation at 808 nm). Moreover, ytterbium sub-lattice energy migration increases the interaction possibility between the nanocrystal and the freely-diffusing rubrenes in solution, resulting in 24-fold (IR806) to 1740-fold (indocyanine green) upconversion (600 nm) increase, depending on the IR dye type, as compared to the one without ytterbium nanotransducers. Ab initio quantum chemistry calculations identify enhanced spin-orbital coupling in the ytterbium-IR806 complex and high energy transfer rate in the ytterbium-rubrene interaction (1010 s 1). Employing inorganic lanthanide nanocrystals as nanotransducers unleashes the potential use of non-metallic infrared organic dyes for triplet fusion upconversion.

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collection(s): Физический факультет
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Chemical engineering journal. 2021. Vol. 426. P. 131282 (1-8)
Language: eng

Created: 28-04-2022

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Физический факультет A hybrid molecular sensitizer for triplet fusion upconversion