Fig. 14. J–V characteristic (light and dark) of (a) Pb-based PSC (with 2PACz HTL) and (b) Pb–Sn-based PSC (with PEDOT:PSS HTL) with a scan rate of 100 mV s−1; Nyquist plot of (c) a Pb-based PSC and (d) a Pb–Sn-based PSC recorded under irradiation with a 470 nm LED at open circuit and at 25 °C. Figure reprinted with permission from ref. 165.
