Toward interaction of sensitizer and functional moieties in hole-transporting materials for efficient semiconductor-sensitized solar cells

Sang Hyuk Im, Choong Sun Lim, Jeong Ah Chang, Yong Hui Lee, Nilkamal Maiti, Hi Jung Kim, Md K. Nazeeruddin, Michael Grätzel, Sang Il Seok

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195 Citations (Scopus)

Abstract

Sb2S3-sensitized mesoporous-TiO2 solar cells using several conjugated polymers as hole-transporting materials (HTMs) are fabricated. We found that the cell performance was strongly correlated with the chemical interaction at the interface of Sb2S3 as sensitizer and the HTMs through the thiophene moieties, which led to a higher fill factor (FF), open-circuit voltage (Voc), and short-circuit current density (Jsc). With the application of PCPDTBT (poly(2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b']dithiophene)-alt-4, 7(2,1,3-benzothiadiazole)) as a HTM in a Sb2S3-sensitized solar cell, overall power conversion efficiencies of 6.18, 6.57, and 6.53% at 100, 50, and 10% solar irradiation, respectively, were achieved with a metal mask.

Original languageEnglish
Pages (from-to)4789-4793
Number of pages5
JournalNano Letters
Volume11
Issue number11
DOIs
Publication statusPublished - 2011 Nov 9

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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    Im, S. H., Lim, C. S., Chang, J. A., Lee, Y. H., Maiti, N., Kim, H. J., Nazeeruddin, M. K., Grätzel, M., & Seok, S. I. (2011). Toward interaction of sensitizer and functional moieties in hole-transporting materials for efficient semiconductor-sensitized solar cells. Nano Letters, 11(11), 4789-4793. https://doi.org/10.1021/nl2026184