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Title: A Step Toward Efficient Panchromatic Multi-Chromophoric Sensitizers for Dye Sensitized Solar Cells

Abstract

Panchromatic dyes with absorption profiles extending into the near infra-red are of interest to researchers in the field of dye sensitized solar cells (DSSCs), as they offer potential access to a wide energy range of photons necessary to enhance solar to electric power conversion efficiencies (PCEs). In this report, a porphyrin with a Soret band absorbing at high energy is combined with a squaraine absorbing at low energy $via$ an acetylene linker to form a bichromophoric sensitizer with molar extinctions on the order of 105 M-1 cm-1 and an incident photon-to-current efficiency (IPCE) onset of ~850 nm. Various bulky substituents were installed on both the porphyrin and squaraine moieties, and conjugation was increased with π-bridge spacers to achieve a PCE of 7.6%, which is up to 15% higher than a comparable squaraine-only dye. For the most part, charge injection dynamics indicate slower charge injection rates and lower injection quantum yields for these bichromophoric sensitizers compared to non-porphyrin squaraine-based DSSC sensitizers. Nevertheless, higher PCE was observed for most porphyrincontaining dyes due largely to increased panchromaticity.

Authors:
 [1];  [2];  [2];  [3];  [2];  [1];  [3];  [2];  [1]
  1. Georgia Inst. of Technology, Atlanta, GA (United States). School of Chemistry and Biochemistry and Center for Organic Photonics and Electronics
  2. Georgia Inst. of Technology, Atlanta, GA (United States). Laser Dynamics Lab., School of Chemistry and Biochemistry
  3. Univ. of Oxford (United Kingdom)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Center for Interface Science: Solar Electric Materials (CISSEM)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1369927
Grant/Contract Number:  
SC0001084
Resource Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 27; Journal Issue: 18; Related Information: CISSEM partners with the University of Arizona (lead); Georgia Institute of Technology; National Renewable Energy Laboratory; Princeton University; University of Washington; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 42 ENGINEERING

Citation Formats

Jradi, Fadi M., O’Neil, Daniel, Kang, Xiongwu, Wong, Jinsze, Szymanski, Paul, Parker, Timothy C., Anderson, Harry L., El-Sayed, Mostafa A., and Marder, Seth R. A Step Toward Efficient Panchromatic Multi-Chromophoric Sensitizers for Dye Sensitized Solar Cells. United States: N. p., 2015. Web. doi:10.1021/acs.chemmater.5b02006.
Jradi, Fadi M., O’Neil, Daniel, Kang, Xiongwu, Wong, Jinsze, Szymanski, Paul, Parker, Timothy C., Anderson, Harry L., El-Sayed, Mostafa A., & Marder, Seth R. A Step Toward Efficient Panchromatic Multi-Chromophoric Sensitizers for Dye Sensitized Solar Cells. United States. https://doi.org/10.1021/acs.chemmater.5b02006
Jradi, Fadi M., O’Neil, Daniel, Kang, Xiongwu, Wong, Jinsze, Szymanski, Paul, Parker, Timothy C., Anderson, Harry L., El-Sayed, Mostafa A., and Marder, Seth R. Wed . "A Step Toward Efficient Panchromatic Multi-Chromophoric Sensitizers for Dye Sensitized Solar Cells". United States. https://doi.org/10.1021/acs.chemmater.5b02006. https://www.osti.gov/servlets/purl/1369927.
@article{osti_1369927,
title = {A Step Toward Efficient Panchromatic Multi-Chromophoric Sensitizers for Dye Sensitized Solar Cells},
author = {Jradi, Fadi M. and O’Neil, Daniel and Kang, Xiongwu and Wong, Jinsze and Szymanski, Paul and Parker, Timothy C. and Anderson, Harry L. and El-Sayed, Mostafa A. and Marder, Seth R.},
abstractNote = {Panchromatic dyes with absorption profiles extending into the near infra-red are of interest to researchers in the field of dye sensitized solar cells (DSSCs), as they offer potential access to a wide energy range of photons necessary to enhance solar to electric power conversion efficiencies (PCEs). In this report, a porphyrin with a Soret band absorbing at high energy is combined with a squaraine absorbing at low energy $via$ an acetylene linker to form a bichromophoric sensitizer with molar extinctions on the order of 105 M-1 cm-1 and an incident photon-to-current efficiency (IPCE) onset of ~850 nm. Various bulky substituents were installed on both the porphyrin and squaraine moieties, and conjugation was increased with π-bridge spacers to achieve a PCE of 7.6%, which is up to 15% higher than a comparable squaraine-only dye. For the most part, charge injection dynamics indicate slower charge injection rates and lower injection quantum yields for these bichromophoric sensitizers compared to non-porphyrin squaraine-based DSSC sensitizers. Nevertheless, higher PCE was observed for most porphyrincontaining dyes due largely to increased panchromaticity.},
doi = {10.1021/acs.chemmater.5b02006},
journal = {Chemistry of Materials},
number = 18,
volume = 27,
place = {United States},
year = {Wed Aug 26 00:00:00 EDT 2015},
month = {Wed Aug 26 00:00:00 EDT 2015}
}

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