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Title: Donor-fullerene dyads for energy cascade organic solar cells

Abstract

Organic bulk hetero junction (BHJ) solar cells require broad absorption of the incident solar spectrum by the donor and acceptor in the blend. Fullerene derivatives with covalently linked dyes, referred to as dyads, were designed to have strong optical absorption and appropriate electronic levels for electron transfer with common donor polymers in BHJs. Dyads with dyes based on diketopyrrolopyrrole and benzothiadiazole were synthesized using either a methanofullerene or a fulleropyrrolidine linkage. The performance of these dyad acceptors in BHJ solar cells with poly(3-hexylthiophene) (P3HT) and a low optical gap co-polymer of thiophene and diketopyrrolopyrrole (PDPP2FT) were examined. Although the solar power conversion efficiencies were low, charge generation from the molecular dye in the dyad could be observed in BHJs with PDPP2FT. The low power conversion efficiency was attributed to the morphology of the BHJs based on grazing incidence wide angle X-ray scattering patterns. Density functional theory was used to examine the charge transfer states between the donor and the dyad. The lowest energy charge-transfer state was found to be a transition from the donor polymer to the fullerene portion of the dyad.

Authors:
 [1];  [2];  [3];  [2];  [2];  [3];  [3];  [4];  [2]
  1. University of California Santa Barbara, Santa Barbara, CA (United States). Department of Chemistry and Biochemistry
  2. University of California Santa Barbara, Santa Barbara, CA (United States). Materials Department
  3. The University of Texas at El Paso, El Paso, TX (United States). Department of Physics
  4. University of California Santa Barbara, Santa Barbara, CA (United States). Department of Chemistry and Biochemistry; University of California Santa Barbara, Santa Barbara, CA (United States). Materials Department
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory, Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC).
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1463300
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Journal Article
Journal Name:
Inorganica Chimica Acta
Additional Journal Information:
Journal Volume: 468; Journal Issue: C; Journal ID: ISSN 0020-1693
Publisher:
Elsevier
Country of Publication:
United States
Language:
English

Citation Formats

Cowart, John S., Liman, Christopher, Garnica, Amanda, Page, Zachariah A., Lim, Eunhee, Zope, Rajendra R., Baruah, Tunna, Hawker, Craig J., and Chabinyc, Michael L. Donor-fullerene dyads for energy cascade organic solar cells. United States: N. p., 2017. Web. doi:10.1016/j.ica.2017.07.008.
Cowart, John S., Liman, Christopher, Garnica, Amanda, Page, Zachariah A., Lim, Eunhee, Zope, Rajendra R., Baruah, Tunna, Hawker, Craig J., & Chabinyc, Michael L. Donor-fullerene dyads for energy cascade organic solar cells. United States. doi:10.1016/j.ica.2017.07.008.
Cowart, John S., Liman, Christopher, Garnica, Amanda, Page, Zachariah A., Lim, Eunhee, Zope, Rajendra R., Baruah, Tunna, Hawker, Craig J., and Chabinyc, Michael L. Wed . "Donor-fullerene dyads for energy cascade organic solar cells". United States. doi:10.1016/j.ica.2017.07.008.
@article{osti_1463300,
title = {Donor-fullerene dyads for energy cascade organic solar cells},
author = {Cowart, John S. and Liman, Christopher and Garnica, Amanda and Page, Zachariah A. and Lim, Eunhee and Zope, Rajendra R. and Baruah, Tunna and Hawker, Craig J. and Chabinyc, Michael L.},
abstractNote = {Organic bulk hetero junction (BHJ) solar cells require broad absorption of the incident solar spectrum by the donor and acceptor in the blend. Fullerene derivatives with covalently linked dyes, referred to as dyads, were designed to have strong optical absorption and appropriate electronic levels for electron transfer with common donor polymers in BHJs. Dyads with dyes based on diketopyrrolopyrrole and benzothiadiazole were synthesized using either a methanofullerene or a fulleropyrrolidine linkage. The performance of these dyad acceptors in BHJ solar cells with poly(3-hexylthiophene) (P3HT) and a low optical gap co-polymer of thiophene and diketopyrrolopyrrole (PDPP2FT) were examined. Although the solar power conversion efficiencies were low, charge generation from the molecular dye in the dyad could be observed in BHJs with PDPP2FT. The low power conversion efficiency was attributed to the morphology of the BHJs based on grazing incidence wide angle X-ray scattering patterns. Density functional theory was used to examine the charge transfer states between the donor and the dyad. The lowest energy charge-transfer state was found to be a transition from the donor polymer to the fullerene portion of the dyad.},
doi = {10.1016/j.ica.2017.07.008},
journal = {Inorganica Chimica Acta},
issn = {0020-1693},
number = C,
volume = 468,
place = {United States},
year = {2017},
month = {11}
}