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. 2014 Mar 7;4:4306. doi: 10.1038/srep04306

Figure 3.

Figure 3

(a) J-V characteristics of inverted PTB7-F20:PC71BM solar cells with and without PC61BM on the ZnO ripple, (b) EQE spectra of the inverted PTB7-F20:PC71BM solar cells with and without the PC61BM layer.