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Published on: January 22, 2019
Optimization of CsPbBr3/PVDF composite for enhanced UV photodetection application
Amr Elattar1, Okenwa Okoli1,2, Tarik Dickens1
1Industrial & Manufacturing Engineering, FAMU-FSU College of Engineering 2525 Pottsdamer St. Tallahassee Florida 32310 USA aelattar@fsu.edu dickens@eng.famu.fsu.edu.
Abstract:
Halide perovskites have exhibited great research impact for developing innovative materials with novel properties. Here, we report the synthesis of different caesium lead bromide perovskites using different (Cs/Pb) molar ratios and fabrication of their corresponding perovskite/polyvinylidene fluoride (PVDF) composites, as well as study of their structural and UV-photodetection properties. Spin-coated perovskite/PVDF composite thin films revealed strong oriented XRD diffraction peaks along the c-axis direction (00l) with homogeneously distributed perovskite microcrystals in the polymer matrix. The high-Cs containing perovskite/PVDF composite, with Cs/Pb (3/1) molar ratio, demonstrated the highest green emission under UV light and its corresponding UV-photodetector exhibited the highest UV photo-responsivity. These results highlight the importance of structural modulation and additive manufacturing for tailoring the optoelectronic properties of halide perovskites.
