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Molecular Packing-Dependent Exciton and Polariton Dynamics in Anthradithiophene Organic Crystals

Published online by Cambridge University Press:  29 May 2018

Jonathan D B Van Schenck ,
Gregory Giesbers ,
Akash Kannegulla ,
Li-Jing Cheng ,
John E. Anthony  and
Oksana Ostroverkhova Open the ORCID record for Oksana Ostroverkhova [Opens in a new window]
Jonathan D B Van Schenck
Affiliation:
Oregon State University, Corvallis, OR, United States.
Gregory Giesbers
Affiliation:
Oregon State University, Corvallis, OR, United States.
Akash Kannegulla
Affiliation:
Oregon State University, Corvallis, OR, United States.
Li-Jing Cheng
Affiliation:
Oregon State University, Corvallis, OR, United States.
John E. Anthony
Affiliation:
University of Kentucky, Lexington, KY, United States.
Oksana Ostroverkhova*
Affiliation:
Oregon State University, Corvallis, OR, United States.
*
*(Email: oksana@science.oregonstate.edu)
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Abstract

Polarization-dependent absorption spectra of two functionalized derivatives of fluorinated anthradithiophene, diF TES-ADT and diF TDMS-ADT, were studied in the crystal phase using a Holstein-like Hamiltonian. For both molecules, the primary contribution to the lowest energy absorption was found to be the S0-S1 excitonic transition perturbed by an intermolecular coupling of 15 meV for both TES and TDMS. A secondary contribution, consistent with that from charge-transfer states, was also found. Additionally, absorption spectra were analysed when crystals were placed inside of optical microcavities formed by two metal mirrors. Cavities exhibited a primary absorption peak determined to be an enhanced absorption from the lowest-energy S0-S1 transition.

Keywords

organicoptical propertiescrystallinephotonic
Type
Articles
Information
MRS Advances , Volume 3 , Issue 59: Electronic and Photonic Materials , 2018 , pp. 3465 - 3470
Copyright
Copyright © Materials Research Society 2018 

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