TY  - JOUR
PY  - 2008//
TI  - Dynamical optical investigation of polymer/fullerene composite solar cells
JO  - Physica Status Solidi (B)
A1  - Voigt, S.
A1  - Zhokhavets, U.
A1  - Al‐Ibrahim, Maher
A1  - Hoppe, H.
A1  - Ambacher, O.
A1  - Gobsch, G.
SP  - 714
EP  - 719
VL  - 245
IS  - 4
N2  - 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)<p /> 
LA  - 
SN  - 0370-1972
UR  - http://dx.doi.org/10.1002/pssb.200743382
ID  - ref1
ER  -