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Figure 2
(a) Depth-dependent volume fraction (composition) profiles of PTB7 (blue dash–dotted curve) and PC71BM (red solid curve), together with porosity (black dashed curve), for the N-1.5 film along the film depth direction Zn (140 nm film thickness). The (I) surface zone, (II) main active layer and (III) interface zone above the PEDOT-PSS conducting layer are marked. The sadh–dotted line for 47% marks a reference volume fraction of PTB7 in the spin-cast solution. (b) Parallel information extracted for the D-1.5 film of a film thickness of 95 nm, showing a much smoother transition zone from the active layer to the PEDOT:PSS conducting layer.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 6| December 2024| Pages 1871-1883
https://doi.org/10.1107/S1600576724010082
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