Layered and Pb-Free Organic-Inorganic Perovskite Materials for Ultraviolet Photoresponse: (010)-Oriented (CH3NH3)2MnCl4 Thin Film

Organic-inorganic perovskite materials show impressive performance in photovoltaics, photodetectors, light emitting diodes, lasers, sensors, medical imaging devices, and other applications. Although Organic-inorganic lead perovskites have shown good performance in numerous fields, they contain toxic Pb, which is expected to cause environmental pollution in future large-scale applications. Thus, the pbotoelectric properties of Pb-free organic-inorganic perovskite materials should be developed and studied. In this paper, we report on the photoresponse of Pb-free organic-inorganic hybrid manganese perovskite (CH3NH3)(2)MnCl4. To the. best of our knowledge, this study demonstrates the first t-time that organic-inorganic hybrid manganese perovskites are used for this type of application. We found that the solution-processed MA(2)MnCl(4) thin film tends to be oriented along the b-axis direction on the TiO2 surface. The evident photoresponse of the FTO/TiO2/MA(2)MnCl(4)/carbon electrode devices was observed under 10-30 Hz flashlight frequencies and a 330 nm light beam This simple, green, and low-cost photoresponsive device is beneficial for the future industrial production of optical recorders and optical memory devices.