Indium-Free PTB7/PC₇₁BM Polymer Solar Cells with Solution-Processed Al:ZnO Electrodes on PET Substrates

Figure 2

(a) UV-Vis transmission spectrum of CBD-AZO on PET and of the photoactive layer on CBD-AZO. (b) AFM topography measurements of an AZO layer on PET foil (2 × 2 μm). (c) Photograph of solar cells with solution-processed AZO on PET polymer foil substrate. (d) SEM cross section of the device on PET foil.

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