Enhancement of organic solar cell efficiency by patterning the PEDOT: PSS hole transport layer using nanoimprint lithography

Je Hong Choi, Hak Jong Choi, Ju Hyeon Shin, Hyeong Pil Kim, Jin Jang, Heon Lee

Research output: Contribution to journalArticle

19 Citations (Scopus)


In order to improve the conversion efficiency of organic photovoltaic (OPV) cells, nano-patterned poly (3,4-ethylenedioxythiophene) poly (styrenesulfonate) (PEDOT:PSS) was used as a hole transfer layer (HTL). Using nanoimprint lithography, a process that is easily applied to large-area substrates, a spherical array of PEDOT:PSS droplets was formed. The effect of the PEDOT:PSS nanostructure was characterized by optical and electrical measurements. Because the hemispherical array of PEDOT:PSS scatters light efficiently, absorption of the incident light increases when the nanostructured layer is employed. The conversion efficiency of the nano-patterned OPV cells is 25% larger than that of non-patterned OPV cells, due to the increase in short-circuit current (J sc).

Original languageEnglish
Pages (from-to)3180-3185
Number of pages6
JournalOrganic Electronics: physics, materials, applications
Issue number12
Publication statusPublished - 2013 Oct 18



  • Nanoimprint lithography
  • Organic photovoltaics
  • Patterning

ASJC Scopus subject areas

  • Biomaterials
  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering
  • Chemistry(all)
  • Condensed Matter Physics

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