Unraveling the Enhanced Electrical Conductivity of PEDOT:PSS Thin Films for ITO-Free Organic Photovoltaics

Sheng Hsiung Chang, Chien Hung Chiang, Feng Sheng Kao, Chuen Lin Tien, Chun Guey Wu

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

We present the structure and the optical and mechanical properties of highly conductive PEDOT:PSS (1:2.5 wt%, PH1000) thin films fabricated with and without an immersion treatment process using a solution containing 67% ethylene glycol and 33% hexafluoro-isopropyl alcohol, by volume. The enhanced electrical conductivity of the PEDOT:PSS thin films originated from the formation of a conducting PEDOT network in combination with an increased electron concentration due to the conformational changes in the PEDOT chains. The modified PEDOT:PSS thin film was used as a transparent anode electrode for P3HT:PCBM blended film-based photovoltaics, resulting in a power conversion efficiency of 3.28% under 1-sun illumination.

Original languageEnglish
Article number8400307
JournalIEEE Photonics Journal
Volume6
Issue number4
DOIs
StatePublished - 1 Aug 2014

Keywords

  • Optoelectronic materials
  • organic materials
  • photovoltaics

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