Figure 2 | Scientific Reports

Figure 2

From: Toward Improved Lifetimes of Organic Solar Cells under Thermal Stress: Substrate-Dependent Morphological Stability of PCDTBT:PCBM Films and Devices

Figure 2

AFM height images of (a) neat PEDOT:PSS and (b) ZnO substrates; as cast PCDTBT:PC60BM (1:2) blend films (~85–100 nm thick) on (c) PEDOT:PSS and (d) ZnO substrates; blend films thermally annealed at 85 °C and 140 °C on (e,g) PEDOT:PSS and (f,h) ZnO substrates, respectively, investigating the nanoscale crystallisation behaviour of PC60BM. The height scale is Δz = 20 nm for all images, except (b) at 70 nm.

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