One-step precipitation of stable perovskite CsPbBr 3 quantum dots in silicate glass by picosecond laser pulses

Abstract

One-step precipitation of CsPbBr 3 QDs in silicate glass was successfully achieved by picosecond laser pulses. Enabled by spatially selective modification, luminescent QDs are well protected by the inorganic glass matrix. The combination of high-power and high-speed scanning system provides a convenient and flexible route for large-scale in situ fabrication of CsPbBr 3 QDs. The dependence of photoluminescence (PL) intensity and absorption band was systematically investigated, and the formation mechanism was briefly discussed. Notable stabilities of CsPbBr 3 QDs against moisture, high temperature as well as ultraviolet (UV) radiation were verified by water-proof and thermal/UV-dependent PL tests. Prospective use for light-emitting device and anti-counterfeiting were also demonstrated.