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. 2020 Oct 22;10:18055. doi: 10.1038/s41598-020-75070-0

Figure 4.

Figure 4

(a) J-V characteristics and (b) EQE spectra of PTB7-Th:PC71BM based PSCs using p- and fZnO NPs as ETLs comparing with as-prepared and aged for 2 months of each NPs. (c) J–V characteristics and (d) EQE spectra of PTB7-Th:IEICO-4F and PBDB-T:IT-M based PSCs with fZnO NPs as ETLs.