fig4
![Non-fused ring acceptors for organic solar cells](https://image.oaes.cc/30f6d980-3b22-422f-9d4c-9b498e30db3f/4372.fig.4.jpg)
Figure 4. Chemical structures of representative non-fused ring acceptors with A-D-A'-D-A structure.
Figure 4. Chemical structures of representative non-fused ring acceptors with A-D-A'-D-A structure.
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