Ultrasonic irradiation-promoted one-step preparation of Mn-doped CsPbClxBr3-x perovskite nanocrystals with a diminished reaction order
Shuhong Xu, Hao Wu, Chunlei Wang, Dayan Ban
Southeast University, China
University of Waterloo, Canada
: J Nanomater Mol Nanotechnol
Abstract
The incorporation of impurity cation as a way of introducing various novel functionalities provides an additional level of control over the electronic and optical properties of perovskite nanocrystals (NCs). However, the conventional post-synthetic cation exchange approaches suffer from large time and energy consumption. In this work, we developed a novel one-pot method to synthesize Mndoped CsPbClxBr3-x NCs by merit of sonochemical technique, achieving dramatically rapid reduce of time and energy consumption. The localized hot spots with high transient temperature, pressure, and cooling rate, as well as an excellent stirring action of ultrasonic preparation facilitate the diffusion of Mn2+ in perovskite lattice. Besides, further reaction kinetics investigation reveals an apparent decrease of reaction order from original method (2.4) to our ultrasound-assisted method (1.0).
Biography
E-mail: xush@seu.edu.cn
