Table 2.

Parameters from device characterization

	Jsat [mA cm−2]	GMAX [cm−3 s −1]	μ [cm2 V–1 s−1]	β [cm3 s−1]	τ [μs]	λ
THF	11.97	3.44 × 10−21	1.14 × 10−4	2.61 ×10−13	1.46	2.95
Water (SDS)	11.25	3.35 × 10−21	6.88 × 10−5	1.89 × 10−13	1.45	2.36
Water (F127)	12.01	3.26 × 10−21	4.04 × 10−4	1.72 × 10−13	1.81	1.89

Summary of calculated charge generation, collection, transport and recombination parameters in optimized P3HT:o-IDTBR solar cells: saturation current (J_sat); maximum rate of free charge carrier generation in saturation regime (G_MAX); charge carrier mobility (μ) and bimolecular recombination coefficient (β) from photo-CELIV measurements; charge carrier lifetime (τ), and recombination exponent (λ) from TPV&CE measurements