Effect of atmospheres on the open-circuit photovoltage of nanoporous TiO2/poly(3-hexylthiophene) heterojunction solar cell

Akira Watanabe, Atsuo Kasuya

研究成果: Article査読

49 被引用数 (Scopus)

抄録

Photovoltaic properties of the nanoporous titanium dioxide TiO 2/poly(3-hexylthiophene) heterojunction solar cell are studied by photovoltammetry under periodic photoirradiation, which is effective in examining the photo- and dark-current potential profiles simultaneously in the same experiment. The open-circuit voltage (Voc) of the TiO 2/poly(3-hexylthiophene) cell significantly depends on the atmosphere in the measurements. Accompanying the increase of the dark current, the photovoltammogram in vacuo shows the lower Voc than that in air. The stepwise increase of the dark current after pulse irradiation is observed in the transient current-time profiles for the TiO2/poly(3-hexylthiophene) cell in vacuo. The difference spectra of the TiO2/poly(3- hexylthiophene) cell during photoirradiation in vacuo show the increase of a broad absorption band attributed to trapped charge carriers in the near-IR region, which is the origin of the dark current increment. The photovoltaic properties of the TiO2/poly(3-hexylthiophene) heterojunction are seriously affected by the trapped charge carriers.

本文言語English
ページ(範囲)358-366
ページ数9
ジャーナルThin Solid Films
483
1-2
DOI
出版ステータスPublished - 2005 7月 1

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 表面および界面
  • 表面、皮膜および薄膜
  • 金属および合金
  • 材料化学

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