Novel π-extended porphyrin derivatives for use in dye-sensitized solar cells

Seung Hyun Chae, Kicheon Yoo, Yo Sub Lee, Min Ju Cho, Jong Hak Kim, Min Jae Ko, Suk Joong Lee, Dong Hoon Choi

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Two novel donor-π-acceptor (D-π-A type) porphyrin dyes were successfully synthesized and use in a dye-sensitized solar cell (DSSC). The molecular structures of both porphyrins are composed of the same dialkyl-substituted diphenylamino unit acting as the donor part, and two bisalkoxyphenyl substituents at the 5,15-meso positions. The acceptor part is composed of different ethyne-linked π-extended bridges, and a cyanoacrylic acid (Dye I) or carboxyphenyl (Dye II) moiety acting as anchoring groups. In order to investigate the effects of including the π-extended bridge between the porphyrin and acceptor unit, two different π-extended bridges such as 2,2′-bithiophene and 2-(phenylethynyl)-thiophene, were employed. In particular, Dye II contains two triple bonds between donor substituted porphyrin and carboxylic acid group. These modifications could potentially reduce dye aggregation on the TiO2 surface. The charge recombination resistance and diffusion length for the cells with Dye II were relatively higher for all the measured ranges of bias potentials, implying that electron recombination loss from injected electrons was highly suppressed when Dye II molecules were adsorbed on the TiO2 surface. Eventually, Dye II containing a 2,2′-bithiophene π-spacer and anchored trough a carboxyphenyl group exhibited a superior power conversion efficiency of 6.7% under AM 1.5 illumination (100 mW.cm-2) in a photoactive area of 0.46 cm 2 than Dye I with a 2-(phenylethynyl)thiophene (PCE = 3.5%) anchored through a cyanoacrylic group.

Original languageEnglish
Pages (from-to)569-578
Number of pages10
JournalJournal of Porphyrins and Phthalocyanines
Volume18
Issue number7
DOIs
Publication statusPublished - 2014 Jan 1

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Porphyrins
Coloring Agents
Derivatives
Thiophenes
Acetylene
Dye-sensitized solar cells
Electrons
Carboxylic Acids
Molecular structure
Conversion efficiency
Agglomeration
Lighting
Molecules
Acids

ASJC Scopus subject areas

  • Chemistry(all)

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Novel π-extended porphyrin derivatives for use in dye-sensitized solar cells. / Chae, Seung Hyun; Yoo, Kicheon; Lee, Yo Sub; Cho, Min Ju; Kim, Jong Hak; Ko, Min Jae; Lee, Suk Joong; Choi, Dong Hoon.

In: Journal of Porphyrins and Phthalocyanines, Vol. 18, No. 7, 01.01.2014, p. 569-578.

Research output: Contribution to journalArticle

Chae, Seung Hyun ; Yoo, Kicheon ; Lee, Yo Sub ; Cho, Min Ju ; Kim, Jong Hak ; Ko, Min Jae ; Lee, Suk Joong ; Choi, Dong Hoon. / Novel π-extended porphyrin derivatives for use in dye-sensitized solar cells. In: Journal of Porphyrins and Phthalocyanines. 2014 ; Vol. 18, No. 7. pp. 569-578.
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abstract = "Two novel donor-π-acceptor (D-π-A type) porphyrin dyes were successfully synthesized and use in a dye-sensitized solar cell (DSSC). The molecular structures of both porphyrins are composed of the same dialkyl-substituted diphenylamino unit acting as the donor part, and two bisalkoxyphenyl substituents at the 5,15-meso positions. The acceptor part is composed of different ethyne-linked π-extended bridges, and a cyanoacrylic acid (Dye I) or carboxyphenyl (Dye II) moiety acting as anchoring groups. In order to investigate the effects of including the π-extended bridge between the porphyrin and acceptor unit, two different π-extended bridges such as 2,2′-bithiophene and 2-(phenylethynyl)-thiophene, were employed. In particular, Dye II contains two triple bonds between donor substituted porphyrin and carboxylic acid group. These modifications could potentially reduce dye aggregation on the TiO2 surface. The charge recombination resistance and diffusion length for the cells with Dye II were relatively higher for all the measured ranges of bias potentials, implying that electron recombination loss from injected electrons was highly suppressed when Dye II molecules were adsorbed on the TiO2 surface. Eventually, Dye II containing a 2,2′-bithiophene π-spacer and anchored trough a carboxyphenyl group exhibited a superior power conversion efficiency of 6.7{\%} under AM 1.5 illumination (100 mW.cm-2) in a photoactive area of 0.46 cm 2 than Dye I with a 2-(phenylethynyl)thiophene (PCE = 3.5{\%}) anchored through a cyanoacrylic group.",
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T1 - Novel π-extended porphyrin derivatives for use in dye-sensitized solar cells

AU - Chae, Seung Hyun

AU - Yoo, Kicheon

AU - Lee, Yo Sub

AU - Cho, Min Ju

AU - Kim, Jong Hak

AU - Ko, Min Jae

AU - Lee, Suk Joong

AU - Choi, Dong Hoon

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AB - Two novel donor-π-acceptor (D-π-A type) porphyrin dyes were successfully synthesized and use in a dye-sensitized solar cell (DSSC). The molecular structures of both porphyrins are composed of the same dialkyl-substituted diphenylamino unit acting as the donor part, and two bisalkoxyphenyl substituents at the 5,15-meso positions. The acceptor part is composed of different ethyne-linked π-extended bridges, and a cyanoacrylic acid (Dye I) or carboxyphenyl (Dye II) moiety acting as anchoring groups. In order to investigate the effects of including the π-extended bridge between the porphyrin and acceptor unit, two different π-extended bridges such as 2,2′-bithiophene and 2-(phenylethynyl)-thiophene, were employed. In particular, Dye II contains two triple bonds between donor substituted porphyrin and carboxylic acid group. These modifications could potentially reduce dye aggregation on the TiO2 surface. The charge recombination resistance and diffusion length for the cells with Dye II were relatively higher for all the measured ranges of bias potentials, implying that electron recombination loss from injected electrons was highly suppressed when Dye II molecules were adsorbed on the TiO2 surface. Eventually, Dye II containing a 2,2′-bithiophene π-spacer and anchored trough a carboxyphenyl group exhibited a superior power conversion efficiency of 6.7% under AM 1.5 illumination (100 mW.cm-2) in a photoactive area of 0.46 cm 2 than Dye I with a 2-(phenylethynyl)thiophene (PCE = 3.5%) anchored through a cyanoacrylic group.

KW - dye-sensitized solar cell

KW - photosensitizer

KW - porphyrin

KW - power conversion efficiency

KW - ruthenium

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