Strongly quantum-confined Mn2+-doped CsPbBr3 nanocrystals in MCM-41 with pure blue emission

Abstract

Mn²⁺-doped CsPbBr₃ nanocrystals (NCs) within MCM-41 mesophase silica have been prepared via a template-assisted strategy by using MCM-41 as the template. The template-synthesized CsPb_1−xMn_xBr₃ NCs (x = 0–1) with the investigated perovskite compositions are luminescent with 465 nm pure blue light. The coprecipitation of bulk materials can be controlled by varying the amount of Mn²⁺ doping because the formation energy of CsPbBr₃ NCs rises slightly on increasing the Mn²⁺ content and then decreases with the further increase in the Mn²⁺ content. Furthermore, they also exhibit excellent UV and air stability due to the existence of MCM-41 mesoporous silica and can be used as phosphors for solid-state lighting.