Imperial College London
Alternate

ProfessorArashMostofi

Faculty of Engineering, Department of Materials

Professor of Theory and Simulation of Materials
 
 
 
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Contact

 

+44 (0)20 7594 8154a.mostofi Website

 
 
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Location

 

Bessemer B332Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Prentice:2021:10.1021/acs.jctc.1c00227,
author = {Prentice, J and Mostofi, AA},
doi = {10.1021/acs.jctc.1c00227},
journal = {Journal of Chemical Theory and Computation},
pages = {5214--5224},
title = {Accurate and efficient computation of optical absorption spectra of  molecular crystals: the case of the polymorphs of ROY},
url = {http://dx.doi.org/10.1021/acs.jctc.1c00227},
volume = {17},
year = {2021}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - When calculating the optical absorption spectra of molecular crystals from first principles, the influence of the crystalline environment on the excitations is of significant importance. For such systems, however, methods to describe the excitations accurately can be computationally prohibitive due to the relatively large system sizes involved. In this work, we demonstrate a method that allows optical absorption spectra to be computed both efficiently and at high accuracy. Our approach is based on the spectral warping method successfully applied to molecules in solvent. It involves calculating the absorption spectrum of a supercell of the full molecular crystal using semi-local time-dependent density functional theory (TDDFT), before warping the spectrum using a transformation derived from smaller-scale semi-local and hybrid TDDFT calculations on isolated dimers. We demonstrate the power of this method on three polymorphs of the well-known color polymorphic compound ROY and find that it outperforms both small-scale hybrid TDDFT dimer calculations and large-scale semi-local TDDFT supercell calculations, when compared to the experiment.
AU  - Prentice,J
AU  - Mostofi,AA
DO  - 10.1021/acs.jctc.1c00227
EP  - 5224
PY  - 2021///
SN  - 1549-9618
SP  - 5214
TI  - Accurate and efficient computation of optical absorption spectra of  molecular crystals: the case of the polymorphs of ROY
T2  - Journal of Chemical Theory and Computation
UR  - http://dx.doi.org/10.1021/acs.jctc.1c00227
UR  - https://pubs.acs.org/doi/10.1021/acs.jctc.1c00227
UR  - http://hdl.handle.net/10044/1/90812
VL  - 17
ER  -
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