کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5376395 1504325 2007 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A two-dimensional model for energy transfer in pure and mixed J-aggregates
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
A two-dimensional model for energy transfer in pure and mixed J-aggregates
چکیده انگلیسی
A model, based on numerical simulations, is provided to study the energy transfer and the fluorescence of a two-dimensional mixed J-aggregate featuring the mixing of oxacyanine and thiacyanine molecules. The J-aggregate is modeled as a square arrangement of parallel donor molecules in which a given concentration of acceptors, with a similar structure, is randomly substituted. The Frenkel exciton states of the mixed quantum system are calculated by numerical diagonalization of the aggregate Hamiltonian with inclusion of the static disorder. The concentration dependences of the density of states, the absorption lineshapes and the localization behavior of the mixed exciton states are simulated. The intraband and interband scattering rates are calculated using a model of exciton-phonon coupling. The time evolution of the exciton populations after initial excitation is calculated. The time-resolved and the fluorescence lineshapes are simulated as a function of the concentration ranging from 0 to 1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Physics - Volume 333, Issues 2–3, 30 March 2007, Pages 186-193
نویسندگان
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