Title

Using Temperature Dependent Fluorescence to Evaluate Singlet Fission Pathways in Tetracene Single Crystals

Document Type

Article

Publication Date

12-21-2020

Publication Title

Journal of Chemical Physics

Volume

153

First page number:

1

Last page number:

11

Abstract

The temperature-dependent fluorescence spectrum, decay rate, and spin quantum beats are examined in single tetracene crystals to gain insight into the mechanism of singlet fission. Over the temperature range of 250 K–500 K, the vibronic lineshape of the emission indicates that the singlet exciton becomes localized at 400 K. The fission process is insensitive to this localization and exhibits Arrhenius behavior with an activation energy of 550 ± 50 cm−1. The damping rate of the triplet pair spin quantum beats in the delayed fluorescence also exhibits an Arrhenius temperature dependence with an activation energy of 165 ± 70 cm−1. All the data for T... (See full abstract in article).

Disciplines

Biological and Chemical Physics

Language

English

UNLV article access

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