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Figure 6
(a) The materials composition fit produced by QANT for a mixture of P(NDI2OD-T2) and BFS4 (Deshmukh et al., 2015BB5). The result shows an enrichment of BFS4 at the surface. (b) The full calculated index of refraction for P(NDI2OD-T2). The imaginary component of the refractive index, β, as previously shown in Fig. 4(d), is the absorptive part of the refractive index, whereas the real deviation from 1, δ, is calculated from β by the Kramers–Kronig relations as described in the text if a chemical formula and density are input into QANT.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 1| January 2016| Pages 374-380
doi:10.1107/S1600577515018688
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