Study on the halide effect of MA4PbX6?2H2O hybrid perovskites - From thermochromic properties to practical deployment for smart windows

摘要

Thermochromic smart windows empowered by the unique material properties and reversible thermochromism of dihydrated methylammonium lead halide hybrid perovskites (MA(4)PbX(6)center dot 2H(2)O; X: halide) have risen as novel yet promising candidates for thermochromic smart windows, in which the halide plays a crucial role to the functionality and performance. In this study, the effects of halide types and mixing ratios on the thermochromic properties and practical deployment of MA(4)PbX(6)center dot 2H(2)O halide hybrid perovskites are comprehensively studied by extensive fabrication and characterization processes as well as fundamental and applicational investigation tools. The potential perovskite compositions for thermochromic smart window applications are identified with respect to the desired optical properties (i.e. luminous transmittance and solar modulation ability) and transitional properties (i.e. transition temperature, hysteresis width and transition time). Moreover, thermal-regulating performance of the applicable candidate mixed halide hybrid perovskite MA(4)PbI(5)Br(1)center dot 2H(2)O is demonstrated in a model house field investigation. This work provides not only an inclusive database of the thermochromic properties of MA(4)PbX(6)center dot 2H(2)O halide hybrid perovskites, but also an application manual about their deployment for thermochromic smart windows, facilitating the development of smart windows and sustainable buildings.

关键词