Single Crystal Perovskite Microplate for High-Order Multiphoton Excitation

Single crystal perovskite microplates are fundamentally and technologically very important to developing high-order (n >= 3) multiphoton excitation. This study reports the preparation of high-quality single crystal perovskite microplates through the controlled release of lead ions from the confined species within a metal-organic framework. The resulting free-standing MAPbBr(3) (MA = CH3NH3+) and CsPbBr3 single crystals of rectangular microplates exhibit excellent multiphoton excitation behaviors, as demonstrated in their five-photon-excited photoluminescence and three-photon-pumped stimulated emission with the threshold of 159 mJ cm(-2), providing the promise of exploring high-quality single crystal perovskite microplates for functional optoelectronic and photonics applications.