Figure 3
From: Spiro-Phenylpyrazole/Fluorene as Hole-Transporting Material for Perovskite Solar Cells
(a) Structural diagram of the hole-only cell Au/HTM/Au for electrochemical impedance measurement. (b) The typical Nyquist plot of Au/WY-1/Au measured at −0.4 V and its fitting curve using an equivalent circuit (inset). (c) The calculated hole mobility of HTMs vs. applied bias.
