High open-circuit voltage solid-state dye-sensitized solar cells with organic dye

Chao-Yu Chen, Jun Ho Yum, Filippo De Angelis, Edoardo Mosconi, Simona Fantacci, Soo Jin Moon, Robin Humphry Baker, Jaejung Ko, Md K. Nazeeruddin, Michael Grätzel

Research output: Contribution to journalArticlepeer-review

213 Citations (Scopus)

Abstract

Solid-state dye-sensitized solar cells were fabricated using an organic dye, 2-cyanoacrylic acid-4-(bis-dimethylfluoreneaniline)dithiophene (JK2), which exhibits more than 1 V open-circuit potential (Voc). To scrutinize the origin of high voltage in these cells, transient Voc decay measurements and density functional theroy calculations of the interacting dye/semiconductor surface were performed. A negative conduction band shift was observed due to the favorable dipolar field exerted by the JK2 sensitizer to the TiO2 surface, at variance with heteroleptic Ru(ll)-dyes for which an opposite dipole effect was found, providing an increased Voc.

Original languageEnglish
Pages (from-to)2487-2492
Number of pages6
JournalNano letters
Volume9
Issue number6
DOIs
Publication statusPublished - 2009 Jun 10

All Science Journal Classification (ASJC) codes

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

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