Simple brush-painting of Ti-doped In2O3 transparent conducting electrodes from nano-particle solution for organic solar cells

Jin A. Jeong, Ye Jin Jeon, Seok Soon Kim, Boo Kyoung Kim, Kwun Bum Chung, Han Ki Kim

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this work, we have demonstrated that simple brush-painted Ti-doped In2O3(TIO) films can be used as a cost effective transparent anodes for organic solar cells (OSCs). By the direct brushing of TIO nanoparticles ink and rapid thermal annealing (RTA), we can simply obtain TIO electrodes with a low sheet resistance of 28.25 /□ and a high optical transmittance of 85.48% under atmospheric ambient conditions. In particular, the brush painted TIO films showed a much higher mobility (33.4 cm2/V s) than that of previously reported solution-process transparent oxide films (1-5 cm2/V s) due to the effects of the Ti dopant with higher Lewis acid strength (3.06) and the reduced contact resistance of TIO nanoparticles. The OSCs fabricated on the brush-painted TIO films exhibited cell-performance with an open circuit voltage (Voc) of 0.61 V, shot circuit current (J sc) of 7.90 mA/cm2, fill factor (FF) of 61%, and power conversion efficiency (PCE) of 2.94%. This indicates that brush-painted TIO film is a promising cost-effective transparent electrode for printing-based OSCs with its simple process and high performance.

Original languageEnglish
Pages (from-to)241-250
Number of pages10
JournalSolar Energy Materials and Solar Cells
Volume122
DOIs
StatePublished - Mar 2014

Keywords

  • Brush-painting
  • Indium titanium oxide
  • Organic solar cells
  • Rapid thermal annealing
  • Transparent electrode

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