Controlled growth of dibenzotetraphenylperiflanthene thin films by varying substrate temperature for photovoltaic applications

Ying Zhou, Tetsuya Taima, Yosei Shibata, Tetsuhiko Miyadera, Toshihiro Yamanari, Yuji Yoshida

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

We investigate the growth of a novel organic photovoltaic material, dibenzotetraphenylperiflanthene (DBP) thin film by ultra-high-vacuum evaporation. It is shown that the surface morphology and crystalline order of DBP thin films are greatly changed by growth temperature. Especially, at 90 °C, the DBP exhibits a unique orientated growth with long well-directional grain structures. The power conversion efficiency of the device using DBP grown at 90 °C is enhanced by a factor of 61% relative to that of the device using DBP grown at room temperature due to the improvements in photocurrent, open-circuit voltage and fill factor. The results indicate the feasibility of the controlled growth of DBP thin films, which plays a crucial role in improving the performances of photovoltaic devices.

Original languageEnglish
Pages (from-to)2861-2866
Number of pages6
JournalSolar Energy Materials and Solar Cells
Volume95
Issue number10
DOIs
Publication statusPublished - 2011 Oct 1
Externally publishedYes

Keywords

  • Controlled growth
  • DBP thin film
  • Organic photovoltaic
  • Surface morphology
  • Vacuum evaporation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films

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