Novel Strategy for Designing Photochromic Ceramic: Reversible Upconversion Luminescence Modification and Optical Information Storage Application in the PbWO:Yb, Er Photochromic Ceramic.

Inorganic photochromic material is an available medium to obtain optical information storage. The photochromic property of the inorganic material is mainly from the defects of the host. However, the formation of defects in the host is uncontrollable, in particular, the revisable formation and removement of defects are difficult.

Reversible Modulated Upconversion Luminescence of MoO:Yb,Er Thermochromic Phosphor for Switching Devices.

Reversible modulation of upconversion luminescence induced by the external field stimuli exhibits potential applications in various fields, such as photoswitches, optical sensing, and optical memory devices. Herein, a new MoO:Yb,Er thermochromic phosphor was synthesized via a high-temperature solid-state method, and the reversible color modification of the MoO:Yb,Er phosphor was obtained by alternating the sintering conditions either in a reducing atmosphere or in air. The color of the MoO:Yb,Er phosphor changed from light-yellow to blue under sintering in the reducing atmosphere and returned back after sintering again in air.