Fabrication and Characterization of PCBM:P3HT Bulk Heterojunction Solar Cells Doped with Germanium Phthalocyanine or Germanium Naphthalocyanine

Kazumi Yoshida, Takeo Oku, Atsushi Suzuki, Tsuyoshi Akiyama, Yasuhiro Yamasaki

Department of Materials Science, The University of Shiga Prefecture, Shiga, Japan.
Department of New Business, Orient Chemi- cal Industries Co. Ltd., Osaka, Japan.

DOI: 10.4236/msa.2013.44A001                

Abstract

[6,6]-phenyl C₆₁-butyric acid methyl ester: poly (3-hexylthiophene) bulk heterojunction solar cells doped with germanium phthalocyanine or germanium naphthalocyanine were fabricated and characterized. Photovoltaic properties of the solar cells with inverted structures were investigated by optical absorption, current density-voltage characteristic and incident photon to current conversion efficiency. These germanium phthalocyanine and germanium naphthalocyanine blended as the third component absorbed light with wavelength longer than 700 nm. Morphology of solar cells was investigated by atomic force microscopy, and energy levels of the solar cells were discussed for power conversion efficiency.

Keywords

Organic Solar Cell; Inverted Structure; Phthalocyanine; Germanium; P3HT; PCBM

Conflicts of Interest

The authors declare no conflicts of interest.

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