Treating the Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) Surface with Hydroquinone Enhances the Performance of Polymer Solar Cells

Sujung Park, Myung Joo Cha, Jung Hwa Seo, Jinhee Heo, Dong Chan Lim, Shinuk Cho

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The introduction of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as a standard hole transport layer greatly increased the efficiency of early organic solar cells. However, because PEDOT:PSS has a metallic property, it can still form a barrier by means of metal-semiconductor contact at its interface with the photoactive layer. In this study, we modified the PEDOT:PSS surface with hydroquinone (HQ) to remove that barrier. HQ treatment of the PEDOT:PSS surface lowered the hole transport barrier at the interface between the PEDOT:PSS and the active layer. In addition, because of the secondary doping effect of HQ, the sheet resistance of the PEDOT:PSS surface decreased by almost 2 orders of magnitude. As a result, the device fabricated with the HQ-modified PEDOT:PSS showed a 28% increase in efficiency compared to the device without HQ treatment. Modifying the PEDOT:PSS surface with HQ solution is an easy way to effectively boost the performance of polymer solar cells.

Original languageEnglish
Pages (from-to)41578-41585
Number of pages8
JournalACS applied materials & interfaces
Volume10
Issue number48
DOIs
StatePublished - 5 Dec 2018

Keywords

  • PEDOT:PSS
  • hole transport layer
  • hydroquinone
  • organic photovoltaic
  • surface modification

Fingerprint

Dive into the research topics of 'Treating the Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate) Surface with Hydroquinone Enhances the Performance of Polymer Solar Cells'. Together they form a unique fingerprint.

Cite this