Organic Photovoltaic Structures as Photo-active Electrodes

Matthew P. Gustafson, Noel Clark, Bjorn Winther Jensen, Douglas R. Macfarlane

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

This study demonstrated the novel use of a bulk heterojunction (BHJ), as present in modern organic solar cells, as a light-assisted electrocatalyst for water electrolysis reactions. Two separate organic photo-voltaic electrode structures were designed for targeting both the reduction, (ITO-PET/PEDOT:PSS/ P3HT:PCBM)* and oxidation, (ITO-PET/ZnO/P3HT:PCBM)* reactions of water, denoted as OPE-R and OPE-O respectively. The OPE-R electrode supported both the proton reduction reaction (PRR) and oxygen reduction reaction (ORR) achieving photocurrents of -0.04 mAcm-2 (ORR) and -0.03 mAcm -2 (PRR) and a photovoltage of 0.50 V (ORR) and onset photovoltage at -0.59 V (PRR). By comparison, the OPE-O electrode achieved photocurrents of 0.15 mAcm-2 and photovoltages of 0.35 V for the water oxidation reaction (WOR). Both BHJ designs confirmed evidence of photo-enhanced Bulk Heterojunction Electrode (BHE) activity. The stability and sources of electrode degradation were also studied, with the OPE-O electrode proving to be more stable than the OPE-R electrode, most likely due to the PEDOT:PSS layer and PSS migration in the presence of water. *Indium Tin Oxide (ITO), Polyethylene Terephthalate (PET), Poly(3,4-ethylenedioxythiophene) (PEDOT), Polystyrenesulfonate acid (PSS), Poly(3-hexylthiophene) (P3HT), Phenyl-C 61-Butyric acid Methyl ester (PCBM), Zinc Oxide (ZnO)

Original languageEnglish
Pages (from-to)309-313
Number of pages5
JournalElectrochimica Acta
Volume140
DOIs
Publication statusPublished - 2014 Sep 10
Externally publishedYes

Fingerprint

Electrodes
Polyethylene Terephthalates
Butyric acid
Butyric Acid
Tin oxides
Polyethylene terephthalates
Indium
Zinc Oxide
Heterojunctions
Protons
Esters
Acids
Water
Oxygen
Zinc oxide
Photocurrents
Oxidation
Electrocatalysts
Electrolysis
Degradation

Keywords

  • Heterojunction
  • P3HT:PCBM
  • Photo-enhanced
  • Water electrolysis

ASJC Scopus subject areas

  • Electrochemistry
  • Chemical Engineering(all)

Cite this

Organic Photovoltaic Structures as Photo-active Electrodes. / Gustafson, Matthew P.; Clark, Noel; Winther Jensen, Bjorn; Macfarlane, Douglas R.

In: Electrochimica Acta, Vol. 140, 10.09.2014, p. 309-313.

Research output: Contribution to journalArticle

Gustafson, Matthew P. ; Clark, Noel ; Winther Jensen, Bjorn ; Macfarlane, Douglas R. / Organic Photovoltaic Structures as Photo-active Electrodes. In: Electrochimica Acta. 2014 ; Vol. 140. pp. 309-313.
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