Power Dependence of the Magnetic Field Effect on Triplet Fusion: A Quantitative Model
Power Dependence of the Magnetic Field Effect on Triplet Fusion: A Quantitative Model
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DOI：
10.1021/acs.jpclett.3c00919
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发表时间：
2023-05-15
影响因子：
5.7
通讯作者：
Schmidt, Timothy W.
中科院分区：
文献类型：
--
作者：
Forecast, Roslyn;Gholizadeh, Elham M.;Schmidt, Timothy W.
提高太阳能效率的两种战略--三重聚变和单重裂变--依赖于三重-三重相互作用的细节。在三联体融合中，有几个步骤，每一个步骤都可能是一种丢失机制。在求解过程中，描述三重态聚变碰撞的参数很难检测。在这里，我们证明了这些参数可以通过研究三重态聚变上转换的磁场依赖性来确定。结果表明，随着激光功率的增加，系统从二次湮灭态向线性湮没态转变，三重态聚变的磁场效应减小。我们的数据是用一小部分参数来模拟的，这些参数表征了三重态聚变动力学。用分子动力学模拟对这些参数进行了交叉验证。该方法既适用于溶液材料，也适用于固态材料，为筛选光子上转换势零化子提供了一种工具。
Two strategies for improving solar energy efficiencies,tripletfusion and singlet fission, rely on the details of triplet-tripletinteractions. In triplet fusion, there are several steps, each ofwhich is a possible loss mechanism. In solution, the parameters describingtriplet fusion collisions are difficult to inspect. Here we show thatthese parameters can be determined by examining the magnetic fielddependence of triplet fusion upconversion. We show that there is areduction of the magnetic field effect for perylene triplet fusionas the system moves from the quadratic to linear annihilation regimeswith an increase in laser power. Our data are modeled with a smallset of parameters that characterize the triplet fusion dynamics. Theseparameters 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.