Dynamical optical investigation of polymer/fullerene composite solar cells

Dynamical optical investigation of polymer/fullerene composite solar cells

We investigate organic polymer/fullerene (P3HT/PCBM) bulk heterojunction solar cells by means of photoinduced absorption spectroscopy (PIA). The dynamic properties of the charge carriers are studied in the temperature range of 5 K to 200 K by recording the PIA signal in the frequency domain. The mob...

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Veröffentlicht in:Physica Status Solidi (b) 2008-04, Vol.245 (4), p.714-719
Hauptverfasser: Voigt, S., Zhokhavets, U., Al-Ibrahim, Maher, Hoppe, H., Ambacher, O., Gobsch, G.
Format: Artikel
Sprache:eng
Schlagworte:
71.38.−k
72.40.+w
72.80.Le
Applied sciences
Energy
Exact sciences and technology
Natural energy
Photovoltaic conversion
Solar cells. Photoelectrochemical cells
Solar energy
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Zusammenfassung:We investigate organic polymer/fullerene (P3HT/PCBM) bulk heterojunction solar cells by means of photoinduced absorption spectroscopy (PIA). The dynamic properties of the charge carriers are studied in the temperature range of 5 K to 200 K by recording the PIA signal in the frequency domain. The mobility and the lifetime of the positive polarons are de‐ termined. The dependence of the short circuit current on the incident light intensity is also investigated. Finally, the properties of annealed and not annealed solar cells are compared. As the most interesting result, the appearance of two polaron species on different time scales is observed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
ISSN:0370-1972
1521-3951
DOI:10.1002/pssb.200743382