Improvement of nonlinear response for the power conversion efficiency with light intensities in cobalt complex electrolyte system

Yong Hui Lee, Jin Hyuck Heo, Sang Hyuk Im, Hi Jung Kim, Choong Sun Lim, Tae Kyu Ahn, Sang Il Seok

Research output: Contribution to journalArticle

7 Citations (Scopus)


A vertically aligned TiO2 photoelectrode with sufficient space between TiO2 nanorods was synthesized by sacrificial templating of ZnO nanorods grown on a dense TiO2 layer/FTO film. The more expanded pore space in the TiO2 nanorod film than conventional mesoscopic TiO2 film greatly reduces the mass transport problem of cobalt electrolyte in the vicinity of the Sb2S3 sensitizer in Sb2S3-sensitized photoelectrochemical solar cells. Therefore, the nonlinearity of the power conversion efficiency (PCE) under illumination intensity was greatly relieved to 5.0% (0.1 sun), 4.7% (0.5 sun), and 3.7% (1 sun) in a TiO2-nanorod-based Sb2S 3-sensitized solar cell, whereas the efficiency of a mesoscopic-TiO2-based solar cell was significantly degraded to 5.3% (0.1 sun), 3.8% (0.5 sun), and 2.3% (1 sun).

Original languageEnglish
Pages (from-to)63-69
Number of pages7
JournalChemical Physics Letters
Publication statusPublished - 2013 Jun 6
Externally publishedYes


ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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