Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells

Érica Torres; Sara Sequeira; Pedro Parreira; Paulo Mendes; Tiago Silva; Killian Lobato; Maria João Brites

doi:10.1016/j.jphotochem.2015.05.017

Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells

Érica Torres, Sara Sequeira, Pedro Parreira, Paulo Mendes, Tiago Silva, Killian Lobato, Maria João Brites

Research output: Contribution to journal › Article › Academic › peer-review

15 Citations (Scopus)

Abstract

C1-LEN coumarin dye, containing an ethynyl conjugated bridge was tested as a new chromophore for dye-sensitized solar cells (DSSCs). Investigation on the relationship of dye structure, optical properties, electrochemical properties and performance of DSSCs is described. The C1-LEN-sensitized solar cells showed an overall conversion efficiency of 2.2% (J_SC = 6.11 mA/cm², V_OC = 547 mV, FF = 0.66), which corresponds to 68% of N719-based device efficiency, fabricated under similar conditions. Electrochemical impedance spectroscopy (EIS) analysis reveals that charge recombination at the nanocrystalline TiO₂/dye/redox electrolyte interface is similar for C1-LEN and N719 sensitized solar cells, i.e., charge recombination is not the factor limiting the performance of C1-LEN device.

Original language	English
Pages (from-to)	1-8
Number of pages	8
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	310
DOIs	https://doi.org/10.1016/j.jphotochem.2015.05.017
Publication status	Published - 1 Sept 2015
Externally published	Yes

Funding

This work was supported by National Funds through FCT—Foundation for Science and Technology under the Project PTDC/CTM-CER/111590/2009.

Keywords

Alkyne bridge
Charge recombination
Coumarin dyes
Dye aggregation
Dye-sensitized solar cells
EIS analysis

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10.1016/j.jphotochem.2015.05.017

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@article{7e6bd744f3a94aa68b4a4654162e1925,

title = "Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells",

abstract = "C1-LEN coumarin dye, containing an ethynyl conjugated bridge was tested as a new chromophore for dye-sensitized solar cells (DSSCs). Investigation on the relationship of dye structure, optical properties, electrochemical properties and performance of DSSCs is described. The C1-LEN-sensitized solar cells showed an overall conversion efficiency of 2.2\% (JSC = 6.11 mA/cm2, VOC = 547 mV, FF = 0.66), which corresponds to 68\% of N719-based device efficiency, fabricated under similar conditions. Electrochemical impedance spectroscopy (EIS) analysis reveals that charge recombination at the nanocrystalline TiO2/dye/redox electrolyte interface is similar for C1-LEN and N719 sensitized solar cells, i.e., charge recombination is not the factor limiting the performance of C1-LEN device.",

keywords = "Alkyne bridge, Charge recombination, Coumarin dyes, Dye aggregation, Dye-sensitized solar cells, EIS analysis",

author = "{\'E}rica Torres and Sara Sequeira and Pedro Parreira and Paulo Mendes and Tiago Silva and Killian Lobato and Brites, \{Maria Jo{\~a}o\}",

year = "2015",

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day = "1",

doi = "10.1016/j.jphotochem.2015.05.017",

language = "English",

volume = "310",

pages = "1--8",

journal = "Journal of Photochemistry and Photobiology A: Chemistry",

issn = "1010-6030",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells

AU - Torres, Érica

AU - Sequeira, Sara

AU - Parreira, Pedro

AU - Mendes, Paulo

AU - Silva, Tiago

AU - Lobato, Killian

AU - Brites, Maria João

PY - 2015/9/1

Y1 - 2015/9/1

N2 - C1-LEN coumarin dye, containing an ethynyl conjugated bridge was tested as a new chromophore for dye-sensitized solar cells (DSSCs). Investigation on the relationship of dye structure, optical properties, electrochemical properties and performance of DSSCs is described. The C1-LEN-sensitized solar cells showed an overall conversion efficiency of 2.2% (JSC = 6.11 mA/cm2, VOC = 547 mV, FF = 0.66), which corresponds to 68% of N719-based device efficiency, fabricated under similar conditions. Electrochemical impedance spectroscopy (EIS) analysis reveals that charge recombination at the nanocrystalline TiO2/dye/redox electrolyte interface is similar for C1-LEN and N719 sensitized solar cells, i.e., charge recombination is not the factor limiting the performance of C1-LEN device.

AB - C1-LEN coumarin dye, containing an ethynyl conjugated bridge was tested as a new chromophore for dye-sensitized solar cells (DSSCs). Investigation on the relationship of dye structure, optical properties, electrochemical properties and performance of DSSCs is described. The C1-LEN-sensitized solar cells showed an overall conversion efficiency of 2.2% (JSC = 6.11 mA/cm2, VOC = 547 mV, FF = 0.66), which corresponds to 68% of N719-based device efficiency, fabricated under similar conditions. Electrochemical impedance spectroscopy (EIS) analysis reveals that charge recombination at the nanocrystalline TiO2/dye/redox electrolyte interface is similar for C1-LEN and N719 sensitized solar cells, i.e., charge recombination is not the factor limiting the performance of C1-LEN device.

KW - Alkyne bridge

KW - Charge recombination

KW - Coumarin dyes

KW - Dye aggregation

KW - Dye-sensitized solar cells

KW - EIS analysis

UR - https://www.scopus.com/pages/publications/84929998387

U2 - 10.1016/j.jphotochem.2015.05.017

DO - 10.1016/j.jphotochem.2015.05.017

M3 - Article

AN - SCOPUS:84929998387

SN - 1010-6030

VL - 310

SP - 1

EP - 8

JO - Journal of Photochemistry and Photobiology A: Chemistry

JF - Journal of Photochemistry and Photobiology A: Chemistry

ER -

Coumarin dye with ethynyl group as π-spacer unit for dye sensitized solar cells

Abstract

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Keywords

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