Performance enhancement of perovskite solar cell on AZO substrate via atomic layer deposited TiO2 layer

In this study, TiO
₂
thin film is prepared between the aluminum-doped zinc oxide (AZO) substrate and SnO
₂
electron transfer layer by low temperature atomic layer deposition (ALD). Perovskite solar cell (PSC)is fabricated with the device of AZO/TiO
₂
/SnO
₂
/FA
_0.7
MA
_0.2
PbCs
_0.1
Br
_0.67
I
_2.33
/Sprio-OMeTAD/Au. Results show that, with the introduction of TiO
₂
thin film, the stacked electron transfer layer (TiO
₂
/SnO
₂
) exhibits more better transmittance of light and charges extraction ability that lead to increase of the short circuit current density (J
_sc
).