Table 1. Parameters Determined from Ellipsometry and Raman Spectra for Selected Samples Studied in This Work^a.

deposition	Δn(2.5 eV)	ε∞	Ep(eV)	Γp(eV)	ω (cm–1)	Δω (cm–1)
PEDOT:PSS Sigma-Aldrich 483095 (1:1.6 ratio by weight)
BC	0.20	2.68	1.28	0.51	1422	41
DC	0.36	2.78	1.48	0.70	1422	41
DC & DMSO	0.15	2.59	1.67	0.82	1427	41
PEDOT:PSS Heraeus Clevios AI4083 (1:6 ratio by weight)
BC	0.01	2.52	1.27	0.67	1437	44
BC	0.12	2.58	1.03	0.72	1432	42
DC	0.12	2.56	1.01	0.74	1431	43
DC & DMSO	0.04	2.68	1.10	0.74	1429	39

^aThe deposition methods are abbreviated as BC (blade coating) and DC (drop casting). The birefringence Δn = n_e – n_o is given at an energy of 2.5 eV as an indication of the optical anisotropy of each film. The Drude parameters correspond to the ordinary component.