Influence of charge accumulation of photogenerated carriers in the vicinity of donor/acceptor interface on the open-circuit voltage of zinc-porphyrin/ C60 heterojunction organic photovoltaic cells

Soh Ryuzaki, Jun Onoe

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14 Citations (Scopus)

Abstract

The correlation between open-circuit voltage (VOC) and built-in potential (Vbi) upon photo-irradiation in the vicinity of the donor/acceptor (D/A) interface in zinc-octaethylporphyrin [Zn(OEP)]/C 60 heterojunction photovoltaic (OPV) cells is investigated by examining the capacitance-voltage (C-V) characteristics. Charge accumulation of photogenerated carriers in the vicinity of the D/A interface is found to enlarge Vbi of both D [Zn(OEP)] and A (C60) films in the vicinity of the interface. In addition, it is noted that VOC is in good agreement with the sum of Vbi of each film in the vicinity of the D/A interface. This suggests that charge accumulation of photogenerated carriers in the vicinity of the D/A interface plays a key role in determining V OC for solar cells.

Original languageEnglish
Article number265102
JournalJournal Physics D: Applied Physics
Volume44
Issue number26
DOIs
Publication statusPublished - Jul 6 2011
Externally publishedYes

Fingerprint

Photovoltaic cells
photovoltaic cells
Porphyrins
Open circuit voltage
open circuit voltage
Volatile organic compounds
porphyrins
Heterojunctions
heterojunctions
Zinc
zinc
volatile organic compounds
Solar cells
Capacitance
Irradiation
Electric potential
capacitance-voltage characteristics
solar cells
zinc hematoporphyrin
irradiation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

Cite this

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title = "Influence of charge accumulation of photogenerated carriers in the vicinity of donor/acceptor interface on the open-circuit voltage of zinc-porphyrin/ C60 heterojunction organic photovoltaic cells",
abstract = "The correlation between open-circuit voltage (VOC) and built-in potential (Vbi) upon photo-irradiation in the vicinity of the donor/acceptor (D/A) interface in zinc-octaethylporphyrin [Zn(OEP)]/C 60 heterojunction photovoltaic (OPV) cells is investigated by examining the capacitance-voltage (C-V) characteristics. Charge accumulation of photogenerated carriers in the vicinity of the D/A interface is found to enlarge Vbi of both D [Zn(OEP)] and A (C60) films in the vicinity of the interface. In addition, it is noted that VOC is in good agreement with the sum of Vbi of each film in the vicinity of the D/A interface. This suggests that charge accumulation of photogenerated carriers in the vicinity of the D/A interface plays a key role in determining V OC for solar cells.",
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N2 - The correlation between open-circuit voltage (VOC) and built-in potential (Vbi) upon photo-irradiation in the vicinity of the donor/acceptor (D/A) interface in zinc-octaethylporphyrin [Zn(OEP)]/C 60 heterojunction photovoltaic (OPV) cells is investigated by examining the capacitance-voltage (C-V) characteristics. Charge accumulation of photogenerated carriers in the vicinity of the D/A interface is found to enlarge Vbi of both D [Zn(OEP)] and A (C60) films in the vicinity of the interface. In addition, it is noted that VOC is in good agreement with the sum of Vbi of each film in the vicinity of the D/A interface. This suggests that charge accumulation of photogenerated carriers in the vicinity of the D/A interface plays a key role in determining V OC for solar cells.

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