Effect of temperature and magnetic field on the photocurrent response of biomolecular bulk-hetero junction

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ABSTRACT The photocurrent responses were investigated for the biomolecular bulk-hetero junction of chlorophyll a (Chl- a) and 1-(3-methoxycarbonyl)-propyl-1-phenyl-1-phenyl-(6,6)C 61 (PCBM) in the temperature range between 300 K and 1.5 K under the magnetic field up to 8 T. The chopped-light photocurrent decreases on lowering the temperature. Below 10 K, photocurrent decrease was obser ved under the applied magnetic field. Decay of the photocurr ent observed at 10 K was ascribed to the formation of the charged trap under light irradiation. The magnetic field effect (MFE) observed in this device was found to be very similar to that observed in P3HT:PCBM bulk-hetero junction at low temperatures. Keywords: Bulk-hetero junction, magnetic-field effect, photocurrent, chlorophyll, biomolecular compound 1. INTRODUCTION Organic solar cells have been intensively studied because of their features such as low cost, low weight, and mechanical flexibility. 1 A power conversion efficiency of more than 6% has now been reached at illuminations of 200 milliwatts per square centimeter.

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詳細情報 詳細情報について

  • CRID
    1871428067583161472
  • DOI
    10.1117/12.918704
  • ISSN
    0277786X
  • データソース種別
    • OpenAIRE

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