Opto-Electrical Properties of Composite Materials Based on Two Benzotrithiophene Copolymers and Fullerene Derivatives

Table 2

Photovoltaic parameters of P2-based solar cells mixed with different acceptors.

Acceptor	(V)	sc (mA/cm^2)	sc^a (mA/cm^2)	FF (%)	PCE (%)
PC61BM	0.84	6.1	5.9	62.5	3.2
PC71BM	0.83	8.8	8.5	63.1	4.6

^aCalculated from EQE.