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. 2020 Sep 25;59(49):22117–22125. doi: 10.1002/anie.202008724

Figure 4.

Figure 4

a) Architecture of n‐i‐p PNCs based solar cells in planar structure studied in this work. b) Cross‐sectional SEM image of CsSn0.6Ge0.4I3 NCs‐based solar cell, observed at 3 kV. c),d) J–V curves of the champion Sn‐PNCs and SnGe‐PNCs based solar cells (c) under 1 sun illumination (forward and backward scans with a scan rate of 10 mV s−1) and (d) in dark condition (forward scan) while dash line shows the fitting to extract series resistance. The inset picture shows the appearance of a typical CsSn0.6Ge0.4I3 NCs‐based solar cell.