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Performance of Common Density Functionals for Excited States of Tetraphenyldibenzoperiflanthene by Tim Schrader; Eva Perlt; Torsten Fritz; Marek Sierka is a Chemistry article available to read on EtoBox.

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Time-dependent density functional theory is the method of choice to efficiently calculate excitation spectra with the functional and basis set choice allowing one to compromise between accuracy and computational cost. In this work, the performance of different functionals as well as the second-order approximate coupled cluster singles and doubles model CC2 is evaluated by comparing the results to experimental results of the example molecule tetraphenyldibenzoperiflanthene (DBP). The choice of the functional has a significant impact on the calculated spectrum of DBP. The performance of a number of different functionals was evaluated, quantified, and, where possible, discussed. The best functional, tuned-CAM-B3LYP, is used to investigate DBP on a surface of hexagonal boron nitride (h-BN). The resulting spectrum shows excellent agreement with experimental results for a monolayer of DBP on h-BN.

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Author

Tim Schrader; Eva Perlt; Torsten Fritz; Marek Sierka

Publisher

American Chemical Society (ACS)

Published

2023

Language

EN

Field

Chemistry (Physical Sciences)