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

Figure 1

(a) Schematic view of the device architecture. (b) Vacuum energy level diagram for each material used in this study. (c) Chemical structure of the polymer donor PTB7 and the fullerene-derivative PC₇₁BM.

(a)

(b)

(c)