High absorption coefficient cyclopentadithiophene donor-free dyes for liquid and solid-state dye-sensitized solar cells

Yue Hu, Antonio Abate, Yiming Cao, Aruna Ivaturi, Shaik Mohammed Zakeeruddin, Michael Grätzel, Neil Robertson

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We report a series of "donor-free" dyes featuring moieties of oligo(4,4-dihexyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophene) (CPDT) functionalized with cyanoacrylic end groups for mesoscopic titania solar cells based on I-/I3 - or Co(II)/Co(III) redox couple and spiro-OMeTAD hole transporter. These were compared with similar cells using an oligo(3-hexylthiophene) dye (5T), which we reported before. Extending the CPDT moiety of the dye molecules from one to three (denoted as CPDT-1, CPDT-2, and CPDT-3) widens the photoresponse overlap with the solar spectrum, increases the molar absorption coefficient up to 75-000 M-1 cm-1, and improves the short-circuit current (JSC), open-circuit voltage (VOC), and power conversion efficiency (PCE) for all types of DSSCs. Among these sensitizers, CPDT-3 shows the highest PCE of 6.7%, 7.3%, and 3.9% with I-/I3 -, Co(II)/Co(III) redox couple, and spiro-OMeTAD hole transporter, respectively, compared with 7.6%, 9.0%, and 4.0% for 5T. Benefiting from the high absorption of CPDT-3, we demonstrate 900 nm thick mesoporous TiO2 film with remarkable JSC of 10.9 mA cm-2 in solid-state DSCs.

LanguageEnglish
Pages15027-15034
Number of pages8
JournalJournal of Physical Chemistry C
Volume120
Issue number28
Early online date27 Jun 2016
DOIs
Publication statusPublished - 21 Jul 2016

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transporter
absorptivity
Coloring Agents
Dyes
solar cells
dyes
solid state
Conversion efficiency
Liquids
liquids
solar spectra
volatile organic compounds
Open circuit voltage
short circuit currents
open circuit voltage
Volatile organic compounds
Short circuit currents
Solar cells
titanium
Titanium

Cite this

Hu, Yue ; Abate, Antonio ; Cao, Yiming ; Ivaturi, Aruna ; Zakeeruddin, Shaik Mohammed ; Grätzel, Michael ; Robertson, Neil. / High absorption coefficient cyclopentadithiophene donor-free dyes for liquid and solid-state dye-sensitized solar cells. In: Journal of Physical Chemistry C. 2016 ; Vol. 120, No. 28. pp. 15027-15034.
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abstract = "We report a series of {"}donor-free{"} dyes featuring moieties of oligo(4,4-dihexyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophene) (CPDT) functionalized with cyanoacrylic end groups for mesoscopic titania solar cells based on I-/I3 - or Co(II)/Co(III) redox couple and spiro-OMeTAD hole transporter. These were compared with similar cells using an oligo(3-hexylthiophene) dye (5T), which we reported before. Extending the CPDT moiety of the dye molecules from one to three (denoted as CPDT-1, CPDT-2, and CPDT-3) widens the photoresponse overlap with the solar spectrum, increases the molar absorption coefficient up to 75-000 M-1 cm-1, and improves the short-circuit current (JSC), open-circuit voltage (VOC), and power conversion efficiency (PCE) for all types of DSSCs. Among these sensitizers, CPDT-3 shows the highest PCE of 6.7{\%}, 7.3{\%}, and 3.9{\%} with I-/I3 -, Co(II)/Co(III) redox couple, and spiro-OMeTAD hole transporter, respectively, compared with 7.6{\%}, 9.0{\%}, and 4.0{\%} for 5T. Benefiting from the high absorption of CPDT-3, we demonstrate 900 nm thick mesoporous TiO2 film with remarkable JSC of 10.9 mA cm-2 in solid-state DSCs.",
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High absorption coefficient cyclopentadithiophene donor-free dyes for liquid and solid-state dye-sensitized solar cells. / Hu, Yue; Abate, Antonio; Cao, Yiming; Ivaturi, Aruna; Zakeeruddin, Shaik Mohammed ; Grätzel, Michael; Robertson, Neil.

In: Journal of Physical Chemistry C, Vol. 120, No. 28, 21.07.2016, p. 15027-15034.

Research output: Contribution to journalArticle

TY - JOUR

T1 - High absorption coefficient cyclopentadithiophene donor-free dyes for liquid and solid-state dye-sensitized solar cells

AU - Hu, Yue

AU - Abate, Antonio

AU - Cao, Yiming

AU - Ivaturi, Aruna

AU - Zakeeruddin, Shaik Mohammed

AU - Grätzel, Michael

AU - Robertson, Neil

N1 - This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.jpcc.6b03610.

PY - 2016/7/21

Y1 - 2016/7/21

N2 - We report a series of "donor-free" dyes featuring moieties of oligo(4,4-dihexyl-4H-cyclopenta[1,2-b:5,4-b′]dithiophene) (CPDT) functionalized with cyanoacrylic end groups for mesoscopic titania solar cells based on I-/I3 - or Co(II)/Co(III) redox couple and spiro-OMeTAD hole transporter. These were compared with similar cells using an oligo(3-hexylthiophene) dye (5T), which we reported before. Extending the CPDT moiety of the dye molecules from one to three (denoted as CPDT-1, CPDT-2, and CPDT-3) widens the photoresponse overlap with the solar spectrum, increases the molar absorption coefficient up to 75-000 M-1 cm-1, and improves the short-circuit current (JSC), open-circuit voltage (VOC), and power conversion efficiency (PCE) for all types of DSSCs. Among these sensitizers, CPDT-3 shows the highest PCE of 6.7%, 7.3%, and 3.9% with I-/I3 -, Co(II)/Co(III) redox couple, and spiro-OMeTAD hole transporter, respectively, compared with 7.6%, 9.0%, and 4.0% for 5T. Benefiting from the high absorption of CPDT-3, we demonstrate 900 nm thick mesoporous TiO2 film with remarkable JSC of 10.9 mA cm-2 in solid-state DSCs.

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