Optoelectronic Properties of Polyvinylidene Fluoride Films Embedded with FAPbBr(3) Nanocrystals Affected by Carrier Kinetics

Polyvinylidene fluoride (PVDF) films embedded with perovskite nanocrystals (NCs) can maintain their stability for a long time under extreme water, oxygen, and acid-alkali environments. In this study, PVDF films embedded with different FAPbBr(3) (FA = formamidinium) NCs are synthesized by employing a fast and direct method, and prototypes of photodetectors utilizing these films are fabricated. The relationships between the optoelectronic performance and the carrier kinetics in the composite film affected by the synthesis temperature are analyzed in detail by employing transient absorption and temperature-dependent spectroscopy. A primitive fixable light-sensitive detector is fabricated so as to broaden the application of PVDF films embedded with different FAPbBr3 NCs in the optoelectronics field. Our results suggest that PVDF films embedded with perovskite NCs can be applied in many semiconductor devices.