Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties

Se Woong Park; Kyung In Son; Min Jae Ko; Kyungkon Kim; Nam Gyu Park

doi:10.1016/j.synthmet.2009.09.013

Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties

Se Woong Park, Kyung In Son, Min Jae Ko, Kyungkon Kim, Nam Gyu Park

Department of Chemistry & Nanoscience

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

19 Scopus citations

Abstract

This paper describes the effects of donating ability in a D (donor)-π-A (acceptor) structured organic dye on the HOMO and LUMO energy levels and photovoltaic performance in dye-sensitized solar cell. Two different dyes were synthesized based on the cyanoacetic acid as an acceptor and the phenyl-thiophene as a π-conjugated bridge, where one contains a diethyl amino group (P2) and the other has an ethoxy group (P5) as the donor. The HOMO-LUMO energy gap was significantly influenced by donor group, where change of ethoxy donor with stronger amino one in donating ability decreased the energy gap from 2.84 eV to 2.21 eV. Moreover, it was also found that HOMO energy level was more sensitive to change in donor group than LUMO one. Photovoltaic performances of P2- and P5-dye-sensitized solar cells were systematically investigated in terms of the effects of co-adsorbent concentration, TiO₂ film thickness and TiCl₄ post-treatment. Under the best condition, the P5 dye showed the conversion efficiency of 2.62%, while the P2 dye exhibited much higher efficiency of 5.89% due to broader absorption.

Original language	English
Pages (from-to)	2571-2577
Number of pages	7
Journal	Synthetic Metals
Volume	159
Issue number	23-24
DOIs	https://doi.org/10.1016/j.synthmet.2009.09.013
State	Published - Dec 2009

Bibliographical note

Funding Information:
This work was supported by the KIST internal projects under contract 2E20980 and the MOCIE new and renewable energy R&D project under contract 2006-N-PV12-P-05 . This work was also in part supported by the Sungkyunkwan University internal project. We thank Jong-Gyu Baek and Noh Jin Myung for providing the TiO 2 pastes.

Keywords

Dye-sensitized
Electron donor
HOMO-LUMO energy tuning
Metal-free organic sensitizer
Photovoltaics
Solar cell

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.synthmet.2009.09.013

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@article{b4383938b2db46c4be8ac1d43ba8fdc5,

title = "Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties",

abstract = "This paper describes the effects of donating ability in a D (donor)-π-A (acceptor) structured organic dye on the HOMO and LUMO energy levels and photovoltaic performance in dye-sensitized solar cell. Two different dyes were synthesized based on the cyanoacetic acid as an acceptor and the phenyl-thiophene as a π-conjugated bridge, where one contains a diethyl amino group (P2) and the other has an ethoxy group (P5) as the donor. The HOMO-LUMO energy gap was significantly influenced by donor group, where change of ethoxy donor with stronger amino one in donating ability decreased the energy gap from 2.84 eV to 2.21 eV. Moreover, it was also found that HOMO energy level was more sensitive to change in donor group than LUMO one. Photovoltaic performances of P2- and P5-dye-sensitized solar cells were systematically investigated in terms of the effects of co-adsorbent concentration, TiO2 film thickness and TiCl4 post-treatment. Under the best condition, the P5 dye showed the conversion efficiency of 2.62%, while the P2 dye exhibited much higher efficiency of 5.89% due to broader absorption.",

keywords = "Dye-sensitized, Electron donor, HOMO-LUMO energy tuning, Metal-free organic sensitizer, Photovoltaics, Solar cell",

author = "Park, {Se Woong} and Son, {Kyung In} and Ko, {Min Jae} and Kyungkon Kim and Park, {Nam Gyu}",

note = "Funding Information: This work was supported by the KIST internal projects under contract 2E20980 and the MOCIE new and renewable energy R&D project under contract 2006-N-PV12-P-05 . This work was also in part supported by the Sungkyunkwan University internal project. We thank Jong-Gyu Baek and Noh Jin Myung for providing the TiO 2 pastes.",

year = "2009",

month = dec,

doi = "10.1016/j.synthmet.2009.09.013",

language = "English",

volume = "159",

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journal = "Synthetic Metals",

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T1 - Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties

AU - Park, Se Woong

AU - Son, Kyung In

AU - Ko, Min Jae

AU - Kim, Kyungkon

AU - Park, Nam Gyu

N1 - Funding Information: This work was supported by the KIST internal projects under contract 2E20980 and the MOCIE new and renewable energy R&D project under contract 2006-N-PV12-P-05 . This work was also in part supported by the Sungkyunkwan University internal project. We thank Jong-Gyu Baek and Noh Jin Myung for providing the TiO 2 pastes.

PY - 2009/12

Y1 - 2009/12

N2 - This paper describes the effects of donating ability in a D (donor)-π-A (acceptor) structured organic dye on the HOMO and LUMO energy levels and photovoltaic performance in dye-sensitized solar cell. Two different dyes were synthesized based on the cyanoacetic acid as an acceptor and the phenyl-thiophene as a π-conjugated bridge, where one contains a diethyl amino group (P2) and the other has an ethoxy group (P5) as the donor. The HOMO-LUMO energy gap was significantly influenced by donor group, where change of ethoxy donor with stronger amino one in donating ability decreased the energy gap from 2.84 eV to 2.21 eV. Moreover, it was also found that HOMO energy level was more sensitive to change in donor group than LUMO one. Photovoltaic performances of P2- and P5-dye-sensitized solar cells were systematically investigated in terms of the effects of co-adsorbent concentration, TiO2 film thickness and TiCl4 post-treatment. Under the best condition, the P5 dye showed the conversion efficiency of 2.62%, while the P2 dye exhibited much higher efficiency of 5.89% due to broader absorption.

AB - This paper describes the effects of donating ability in a D (donor)-π-A (acceptor) structured organic dye on the HOMO and LUMO energy levels and photovoltaic performance in dye-sensitized solar cell. Two different dyes were synthesized based on the cyanoacetic acid as an acceptor and the phenyl-thiophene as a π-conjugated bridge, where one contains a diethyl amino group (P2) and the other has an ethoxy group (P5) as the donor. The HOMO-LUMO energy gap was significantly influenced by donor group, where change of ethoxy donor with stronger amino one in donating ability decreased the energy gap from 2.84 eV to 2.21 eV. Moreover, it was also found that HOMO energy level was more sensitive to change in donor group than LUMO one. Photovoltaic performances of P2- and P5-dye-sensitized solar cells were systematically investigated in terms of the effects of co-adsorbent concentration, TiO2 film thickness and TiCl4 post-treatment. Under the best condition, the P5 dye showed the conversion efficiency of 2.62%, while the P2 dye exhibited much higher efficiency of 5.89% due to broader absorption.

KW - Dye-sensitized

KW - Electron donor

KW - HOMO-LUMO energy tuning

KW - Metal-free organic sensitizer

KW - Photovoltaics

KW - Solar cell

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M3 - Article

AN - SCOPUS:71649101413

SN - 0379-6779

VL - 159

SP - 2571

EP - 2577

JO - Synthetic Metals

JF - Synthetic Metals

IS - 23-24

ER -

Effect of donor moiety in organic sensitizer on spectral response, electrochemical and photovoltaic properties

Abstract

Bibliographical note

Keywords

UN SDGs

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