[9p-N305-1~15] 12.8 Specific theme: Photoelectric Properties, Device Fabrication and Structural Controls of Organic-Inorganic Hybrid Perovskites

3:00 PM - 3:15 PM JST(6:00 AM - 6:15 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-N305-7] Water-Responsive Chromism of Perovskite Nanocrystals Enabled by a Polymethacrylate Matrix

〇Rintaro Ishikawa¹, Jun Matsui², Hinako Ebe² (1.Grad. Sch. Sci. Eng., Yamagata Univ., 2.Fac. Sci., Yamagata Univ.)

Keywords:

Lead halide perovskite nanocrystals,Polymer matrix,Water-responsive chromism

Lead halide perovskite nanocrystals (PNCs) exhibit excellent luminescence properties and have attracted to optoelectronic materials. PNCs exhibit chromism, in which their luminescence behavior changes in response to external stimuli such as humidity, heat, and light. In particular, they have been reported to show high responsiveness to humidity. On the other hand, most reports are limited to humidity responsiveness, and chromism to direct contact with water has not been achieved. This is attributed to the tendency of ionic PNCs to decompose and leak in water. In this study, we prepared PMMA-PNCs composite membranes using polymethyl methacrylate (PMMA), which strongly interacts with Pb²⁺ ions of PNCs via carbonyl groups, as a matrix and succeeded in creating long-term stable and highly sensitive water-responsive chromism materials. This material is expected to be applied to various practical fields that require moisture visualization, such as water leak detection, humidity indicator, and anti-counterfeiting labels.