Effect of sorbitol doping in PEDOT: PSS on the electrical performance of organic photovoltaic devices

Sungeun Park, Sung Ju Tark, Donghwan Kim

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Organic photovoltaic cells have important advantages, such as low cost and mechanical flexibility. The conducting polymer poly(3,4 ethylenedioxy-thiophene) :poly(styrene sulfonate) (PEDOT:PSS) has been widely used as an interfacial layer or a polymer electrode in polymer electronic devices, such as photovoltaic devices and light-emitting diodes. In this report, we discuss the direct current (DC) conductivity of PEDOT:PSS films containing various weight ratios of sorbitol dopant. The work function is shown to steadily decrease with increasing dopant content. With different dopant contents, illuminated current-voltage photovoltaic characteristics were observed. Ultraviolet photoelectron spectroscopy (UPS) analysis revealed that the work function of the PEDOT:PSS was affected by its sorbitol content. The morphologies of the doped PEDOT:PSS films were characterized by atomic force microscopy (AFM). For the device fabrication, we made organic photovoltaic cells by a spin-coating process and Al deposition by thermal evaporation. The sorbitol dopant is able to improve the efficiency of the device.

Original languageEnglish
Pages (from-to)1299-1301
Number of pages3
JournalCurrent Applied Physics
Volume11
Issue number6
DOIs
Publication statusPublished - 2011 Nov 1

Fingerprint

Thiophenes
Styrene
Sorbitol
Thiophene
sulfonates
thiophenes
polystyrene
Doping (additives)
Photovoltaic cells
photovoltaic cells
Polymers
Ultraviolet photoelectron spectroscopy
Thermal evaporation
ultraviolet spectroscopy
Conducting polymers
polymers
Spin coating
conducting polymers
Light emitting diodes
coating

Keywords

  • Organic solar cells
  • PEDOT:PSS
  • Sorbitol
  • UPS

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

Cite this

Effect of sorbitol doping in PEDOT : PSS on the electrical performance of organic photovoltaic devices. / Park, Sungeun; Tark, Sung Ju; Kim, Donghwan.

In: Current Applied Physics, Vol. 11, No. 6, 01.11.2011, p. 1299-1301.

Research output: Contribution to journalArticle

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