Power Dependence of the Magnetic Field Effect on Triplet Fusion: A Quantitative Model.

Autor:	Forecast R; ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, VIC 3001, Australia., Gholizadeh EM; ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of Melbourne, Parkville, VIC 3010, Australia., Prasad SKK; ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of New South Wales, Kensington, NSW 2052, Australia., Blacket S; Department of Chemistry, School of Physical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia., Tapping PC; Department of Chemistry, School of Physical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia., McCamey DR; ARC Centre of Excellence in Exciton Science, School of Physics, The University of New South Wales, Kensington, NSW 2052, Australia., Tayebjee MJY; School of Photovoltaic and Renewable Energy Engineering, The University of New South Wales, Kensington, NSW 2052, Australia., Huang DM; Department of Chemistry, School of Physical Sciences, The University of Adelaide, Adelaide, SA 5005, Australia., Cole JH; ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, VIC 3001, Australia., Schmidt TW; ARC Centre of Excellence in Exciton Science, School of Chemistry, The University of New South Wales, Kensington, NSW 2052, Australia.
Jazyk:	angličtina
Zdroj:	The journal of physical chemistry letters [J Phys Chem Lett] 2023 May 25; Vol. 14 (20), pp. 4742-4747. Date of Electronic Publication: 2023 May 15.
DOI:	10.1021/acs.jpclett.3c00919
Abstrakt:	Two strategies for improving solar energy efficiencies, triplet fusion and singlet fission, rely on the details of triplet-triplet interactions. In triplet fusion, there are several steps, each of which is a possible loss mechanism. In solution, the parameters describing triplet fusion collisions are difficult to inspect. Here we show that these parameters can be determined by examining the magnetic field dependence of triplet fusion upconversion. We show that there is a reduction of the magnetic field effect for perylene triplet fusion as the system moves from the quadratic to linear annihilation regimes with an increase in laser power. Our data are modeled with a small set of parameters that characterize the triplet fusion dynamics. These parameters are cross-validated with molecular dynamics simulations. This approach can be applied to both solution and solid state materials, providing a tool for screening potential annihilators for photon upconversion.
Databáze:	MEDLINE
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