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. 2018 Mar 5;8(17):9409–9413. doi: 10.1039/c8ra00243f

Fig. 4. (a) Cross-section of perovskite solar cells with the structure FTO/TiO2/perovskite/Spiro-OMeTAD/Au. (b) SEM of the perovskite films. (c) IPCE and (d) J–V curves of devices based on different HTMs. The J–V curves were scanned at speed of 10 mV s−1.

Fig. 4