Fig. 2: Experimental setup and working mechanism of PPPc. | Nature Communications

Fig. 2: Experimental setup and working mechanism of PPPc.

From: Operando dynamics of trapped carriers in perovskite solar cells observed via infrared optical activation spectroscopy

Fig. 2

a Schematic diagram of CW- and ns-PPPc setups. b \(\triangle {{{{{{\rm{J}}}}}}}_{{{{{{\rm{IR}}}}}}}\) responses of FA0.99Cs0.01PbI3 device under different illumination conditions in CW-PPPc measurement. The \(\triangle {{{{{{\rm{J}}}}}}}_{{{{{{\rm{IR}}}}}}}\) only responded when both pump and push beams illuminated the device simultaneously. c FA0.99Cs0.01PbI3 device photocurrent (\({{{{{{\rm{J}}}}}}}_{{{{{{\rm{Pump}}}}}}}\)) as a function of temperature from 20 °C to 80 °C and from 80 °C to 20 °C at a constant pump intensity. d Flat-band energy diagram of the studied devices and the working mechanism of PPPc showing pathways of hole dynamics.

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