Enhanced Photovoltaic Performances of Dye-Sensitized Solar Cells by Co-Sensitization of Benzothiadiazole and Squaraine-Based Dyes

Ashraful Islam, Md. Akhtaruzzaman, Towhid H. Chowdhury, Chuanjiang Qin, Liyuan Han, Idriss M. Bedja, Romain Stalder, Kirk S. Schanze, John R. Reynolds

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Dye-sensitized solar cells (DSSCs) based on a donor-acceptor-donor oligothienylene dye containing benzothiadiazole (T4BTD-A) were cosensitized with dyes containing cis-configured squaraine rings (HSQ3 and HSQ4). The cosensitized dyes showed incident monochromatic photon-to-current conversion efficiency (IPCE) greater than 70% in the 300-850 nm wavelength region. The individual overall conversion efficiencies of the sensitizers T4BTD-A, HSQ3, and HSQ4 were 6.4%, 4.8%, and 5.8%, respectively. Improved power conversion efficiencies of 7.0% and 7.7% were observed when T4BTD-A was cosensitized with HSQ3 and HSQ4, respectively, thanks to a significant increase in current density (JSC) for the cosensitized DSSCs. Intensity-modulated photovoltage spectroscopy results showed a longer lifetime for cosensitized T4BTD-A+HSQ3 and T4BTD-A+HSQ4 compared to that of HSQ3 and HSQ4, respectively.

Original languageEnglish
Pages (from-to)4616-4623
Number of pages8
JournalACS Applied Materials and Interfaces
Volume8
Issue number7
DOIs
Publication statusPublished - 24 Feb 2016

Fingerprint

Conversion efficiency
Coloring Agents
Dyes
Current density
Photons
Spectroscopy
Wavelength
squaraine
Dye-sensitized solar cells
benzo-1,2,3-thiadiazole

Keywords

  • benzothiadiazole dye
  • co-sensitization
  • dye-sensitized solar cell
  • incident photon to current conversion efficiency
  • squaraine dye

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Enhanced Photovoltaic Performances of Dye-Sensitized Solar Cells by Co-Sensitization of Benzothiadiazole and Squaraine-Based Dyes. / Islam, Ashraful; Akhtaruzzaman, Md.; Chowdhury, Towhid H.; Qin, Chuanjiang; Han, Liyuan; Bedja, Idriss M.; Stalder, Romain; Schanze, Kirk S.; Reynolds, John R.

In: ACS Applied Materials and Interfaces, Vol. 8, No. 7, 24.02.2016, p. 4616-4623.

Research output: Contribution to journalArticle

Islam, Ashraful ; Akhtaruzzaman, Md. ; Chowdhury, Towhid H. ; Qin, Chuanjiang ; Han, Liyuan ; Bedja, Idriss M. ; Stalder, Romain ; Schanze, Kirk S. ; Reynolds, John R. / Enhanced Photovoltaic Performances of Dye-Sensitized Solar Cells by Co-Sensitization of Benzothiadiazole and Squaraine-Based Dyes. In: ACS Applied Materials and Interfaces. 2016 ; Vol. 8, No. 7. pp. 4616-4623.
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abstract = "Dye-sensitized solar cells (DSSCs) based on a donor-acceptor-donor oligothienylene dye containing benzothiadiazole (T4BTD-A) were cosensitized with dyes containing cis-configured squaraine rings (HSQ3 and HSQ4). The cosensitized dyes showed incident monochromatic photon-to-current conversion efficiency (IPCE) greater than 70{\%} in the 300-850 nm wavelength region. The individual overall conversion efficiencies of the sensitizers T4BTD-A, HSQ3, and HSQ4 were 6.4{\%}, 4.8{\%}, and 5.8{\%}, respectively. Improved power conversion efficiencies of 7.0{\%} and 7.7{\%} were observed when T4BTD-A was cosensitized with HSQ3 and HSQ4, respectively, thanks to a significant increase in current density (JSC) for the cosensitized DSSCs. Intensity-modulated photovoltage spectroscopy results showed a longer lifetime for cosensitized T4BTD-A+HSQ3 and T4BTD-A+HSQ4 compared to that of HSQ3 and HSQ4, respectively.",
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