Photo-generated carrier dynamics in the vicinity of the donor/acceptor interface of organic solar cells

Soh Ryuzaki, Jun Onoe

Research output: Contribution to journalArticle

Abstract

Change in electronic states before and after photo-irradiation at a Donor/Acceptor (D/A) interface in organic solar cells consisting of zinc-porphyrin and fullerene films has been examined using in situ impedance spectroscopy (IS), which makes it possible to non-destructively measure a built-in potential (Vbi) of both D and A films at the D/A interface. The accumulation of photo-generated carriers in the vicinity of the D/A interface was found to increase the Vbi of both D [Zn(OEP)] and A [C60] films at the interface. In addition, it was noted that the sum of Vbi obtained on photo-irradiation was in good agreement with the open-circuit voltage (VOC), of which the origin is still unsolved for organic solar cells. Thus, the charge accumulation of photo-generated carriers in the vicinity of the D/A interface plays a key role in determining V OC.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalElectronics and Communications in Japan
Volume96
Issue number8
DOIs
Publication statusPublished - Aug 2013
Externally publishedYes

Fingerprint

Organic Solar Cells
solar cells
Irradiation
Porphyrins
Electronic states
Open circuit voltage
Fullerenes
Volatile organic compounds
Porphyrin
Zinc
irradiation
Spectroscopy
volatile organic compounds
open circuit voltage
porphyrins
Impedance
fullerenes
zinc
Voltage
Charge

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Physics and Astronomy(all)
  • Signal Processing
  • Applied Mathematics

Cite this

Photo-generated carrier dynamics in the vicinity of the donor/acceptor interface of organic solar cells. / Ryuzaki, Soh; Onoe, Jun.

In: Electronics and Communications in Japan, Vol. 96, No. 8, 08.2013, p. 1-8.

Research output: Contribution to journalArticle

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