Effect of Solid-State Polarization on Charge-Transfer Excitations and Transport Levels at Organic Interfaces from a Screened Range-Separated Hybrid Functional
We develop a robust approach for the description of the energetics of charge-transfer (CT) excitations and transport levels at organic interfaces based on a screened range-separated hybrid (SRSH) functional. We find that SRSH functionals correctly capture the effect of solid-state electronic polarization on transport gap renormalization and on screening of the electrostatic electron–hole interaction. With respect to calculations based on nonscreened optimally tuned RSH (long-range corrected) functionals, the SRSH-based calculations can be performed for both isolated molecular complexes and systems embedded in a dielectric medium with the same range-separation parameter, which allows a clear physical interpretation of the results in terms of solid-state polarization without any perturbation of the molecular electronic structure. By considering weakly interacting donor/acceptor complexes of pentacene with C60 and poly-3-hexylthiophene (P3HT) with PCBM, we show that this new approach provides CT-state energies that compare very well with experimental data.
%0 Journal Article
%1 doi:10.1021/acs.jpclett.7b01276
%A Zheng, Zilong
%A Egger, David A.
%A Brédas, Jean-Luc
%A Kronik, Leeor
%A Coropceanu, Veaceslav
%D 2017
%J The Journal of Physical Chemistry Letters
%K chargeTransferState organics
%N 0
%P 3277-3283
%R 10.1021/acs.jpclett.7b01276
%T Effect of Solid-State Polarization on Charge-Transfer Excitations and Transport Levels at Organic Interfaces from a Screened Range-Separated Hybrid Functional
%U http://dx.doi.org/10.1021/acs.jpclett.7b01276
%V 0
%X We develop a robust approach for the description of the energetics of charge-transfer (CT) excitations and transport levels at organic interfaces based on a screened range-separated hybrid (SRSH) functional. We find that SRSH functionals correctly capture the effect of solid-state electronic polarization on transport gap renormalization and on screening of the electrostatic electron–hole interaction. With respect to calculations based on nonscreened optimally tuned RSH (long-range corrected) functionals, the SRSH-based calculations can be performed for both isolated molecular complexes and systems embedded in a dielectric medium with the same range-separation parameter, which allows a clear physical interpretation of the results in terms of solid-state polarization without any perturbation of the molecular electronic structure. By considering weakly interacting donor/acceptor complexes of pentacene with C60 and poly-3-hexylthiophene (P3HT) with PCBM, we show that this new approach provides CT-state energies that compare very well with experimental data.
@article{doi:10.1021/acs.jpclett.7b01276,
abstract = { We develop a robust approach for the description of the energetics of charge-transfer (CT) excitations and transport levels at organic interfaces based on a screened range-separated hybrid (SRSH) functional. We find that SRSH functionals correctly capture the effect of solid-state electronic polarization on transport gap renormalization and on screening of the electrostatic electron–hole interaction. With respect to calculations based on nonscreened optimally tuned RSH (long-range corrected) functionals, the SRSH-based calculations can be performed for both isolated molecular complexes and systems embedded in a dielectric medium with the same range-separation parameter, which allows a clear physical interpretation of the results in terms of solid-state polarization without any perturbation of the molecular electronic structure. By considering weakly interacting donor/acceptor complexes of pentacene with C60 and poly-3-hexylthiophene (P3HT) with PCBM, we show that this new approach provides CT-state energies that compare very well with experimental data. },
added-at = {2017-07-10T11:39:44.000+0200},
author = {Zheng, Zilong and Egger, David A. and Brédas, Jean-Luc and Kronik, Leeor and Coropceanu, Veaceslav},
biburl = {https://www.bibsonomy.org/bibtex/22a72354a5a1816a7c00fc9bf0723dab3/cgoehler},
description = {research 1..7 - acs.jpclett.7b01276},
doi = {10.1021/acs.jpclett.7b01276},
eprint = {http://dx.doi.org/10.1021/acs.jpclett.7b01276},
interhash = {02b84aacee748074acb47c2538ba2e83},
intrahash = {2a72354a5a1816a7c00fc9bf0723dab3},
journal = {The Journal of Physical Chemistry Letters},
keywords = {chargeTransferState organics},
note = {PMID: 28666085},
number = 0,
pages = {3277-3283},
timestamp = {2017-07-10T11:39:44.000+0200},
title = {Effect of Solid-State Polarization on Charge-Transfer Excitations and Transport Levels at Organic Interfaces from a Screened Range-Separated Hybrid Functional},
url = {http://dx.doi.org/10.1021/acs.jpclett.7b01276},
volume = 0,
year = 2017
}