Temperature-Dependent Phase Stable Hybrid Halide Perovskite Films by Chemical Vapor Deposition

Methylammonium lead iodide (MAPbI3-xClx) thin films were synthesized using chemical vapor deposition. Temperature-dependent grazing incidence synchrotron-based X-ray diffraction measurements confirm that the structure of MAP-bI(3-x)Cl(x), where Cl acts more like a dopant, remains throughout in the tetragonal phase in the temperature range of 20-300 K. These studies are further correlated with temperature-dependent photo-luminescence (PL) studies. The PL peak energy monotonically increases with temperature, suggestive of a single-phase behavior. Resistance measurements conducted as a function of temperature show an absence of inflection points, suggesting uniformity in its phase. Between 200 and 325 K, the resistance remains a constant.

Automated summary

Methylammonium lead iodide thin films were successfully synthesized using chemical vapor deposition, and their structure and properties were investigated using X-ray diffraction and photoluminescence. The results showed that the films maintained a tetragonal structure in the temperature range of 20-300 K, displaying a single-phase behavior and uniform phase.