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Title: The effects of side-chain-induced disorder on the emission spectra and quantum yields of oligothiophene nano-aggregates. A combined experimental and MD-TDDFT study

Abstract

Oligomeric thiophenes are commonly-used components in organic electronics and solar cells. These molecules stack and/or aggregate readily under the processing conditions used to form thin films for these applications, significantly altering their optical and charge-transport properties. To determine how these effects depend on the substitution pattern of the thiophene main chains, nano-aggregates of three sexi-thiophene (6T) oligomers having different alkyl substitution patterns were formed using solvent poisoning techniques and studied using steady-state and time-resolved emission spectroscopy. The results indicate the substantial role played by the side-chain substituents in determining the emissive properties of these species. Both the measured spectral changes and their dependence on substitution are well modeled by combined quantum chemistry and molecular dynamics simulations. The simulations connect the side-chain-induced disorder, which determines the favorable chain packing configurations within the aggregates, with their measured electronic spectra.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [3];  [1];  [4];  [4]
+ Show Author Affiliations
  1. Carnegie Mellon Univ., Pittsburgh, PA (United States)
  2. Zernike Institute of Advanced Materials Nijenborgh, Groningen (The Netherlands)
  3. Brookhaven National Lab. (BNL), Upton, NY (United States)
  4. Najing Univ., Nanjing (China)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1182498
Report Number(s):
BNL-107399-2015-JA
Journal ID: ISSN 1089-5639; R&D Project: 16063; KC0403020
Grant/Contract Number:  
SC00112704
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory
Additional Journal Information:
Journal Volume: 118; Journal Issue: 45; Journal ID: ISSN 1089-5639
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; functional nanomaterials

Citation Formats

Hong, Jiyun, Jeon, SuKyung, Kim, Janice J., Devi, Diane, Chacon-Madrid, Kelly, Lee, Wynee, Koo, Seung Moh, Wildeman, Jurjen, Sfeir, Matthew Y., Peteanu, Linda A., Wen, Jin, and Ma, Jing. The effects of side-chain-induced disorder on the emission spectra and quantum yields of oligothiophene nano-aggregates. A combined experimental and MD-TDDFT study. United States: N. p., 2014. Web. doi:10.1021/jp504254a.
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Hong, Jiyun, Jeon, SuKyung, Kim, Janice J., Devi, Diane, Chacon-Madrid, Kelly, Lee, Wynee, Koo, Seung Moh, Wildeman, Jurjen, Sfeir, Matthew Y., Peteanu, Linda A., Wen, Jin, & Ma, Jing. The effects of side-chain-induced disorder on the emission spectra and quantum yields of oligothiophene nano-aggregates. A combined experimental and MD-TDDFT study. United States. https://doi.org/10.1021/jp504254a
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Hong, Jiyun, Jeon, SuKyung, Kim, Janice J., Devi, Diane, Chacon-Madrid, Kelly, Lee, Wynee, Koo, Seung Moh, Wildeman, Jurjen, Sfeir, Matthew Y., Peteanu, Linda A., Wen, Jin, and Ma, Jing. Thu . "The effects of side-chain-induced disorder on the emission spectra and quantum yields of oligothiophene nano-aggregates. A combined experimental and MD-TDDFT study". United States. https://doi.org/10.1021/jp504254a. https://www.osti.gov/servlets/purl/1182498.
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@article{osti_1182498,
title = {The effects of side-chain-induced disorder on the emission spectra and quantum yields of oligothiophene nano-aggregates. A combined experimental and MD-TDDFT study},
author = {Hong, Jiyun and Jeon, SuKyung and Kim, Janice J. and Devi, Diane and Chacon-Madrid, Kelly and Lee, Wynee and Koo, Seung Moh and Wildeman, Jurjen and Sfeir, Matthew Y. and Peteanu, Linda A. and Wen, Jin and Ma, Jing},
abstractNote = {Oligomeric thiophenes are commonly-used components in organic electronics and solar cells. These molecules stack and/or aggregate readily under the processing conditions used to form thin films for these applications, significantly altering their optical and charge-transport properties. To determine how these effects depend on the substitution pattern of the thiophene main chains, nano-aggregates of three sexi-thiophene (6T) oligomers having different alkyl substitution patterns were formed using solvent poisoning techniques and studied using steady-state and time-resolved emission spectroscopy. The results indicate the substantial role played by the side-chain substituents in determining the emissive properties of these species. Both the measured spectral changes and their dependence on substitution are well modeled by combined quantum chemistry and molecular dynamics simulations. The simulations connect the side-chain-induced disorder, which determines the favorable chain packing configurations within the aggregates, with their measured electronic spectra.},
doi = {10.1021/jp504254a},
journal = {Journal of Physical Chemistry. A, Molecules, Spectroscopy, Kinetics, Environment, and General Theory},
number = 45,
volume = 118,
place = {United States},
year = {Thu Jul 24 00:00:00 EDT 2014},
month = {Thu Jul 24 00:00:00 EDT 2014}
}
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    Works referencing / citing this record:

    Unlocking the action mechanisms of molecular nonlinear optical absorption for optical conjugated polymers under aggregation states
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