Reversible photoluminescence switching in photochromic material Sr₆Ca₄(PO₄)₆F₂:Eu²⁺ and the modified performance by trap engineering via Ln³⁺ (Ln = La, Y, Gd, Lu) co-doping for erasable optical data storage

Abstract

Photochromism modification by trap engineering via rare earth ion co-dopants for erasable optical data storage.

Realizing nondestructive luminescence readout in photochromic ceramics via deep ultraviolet excitation for optical information storage

“…[13][14][15][16][17][18][19][20][21] Currently, the research on inorganic photochromic materials mainly focuses on transition metal oxides (WO3, MoO3, TiO2, Nb2O5 and V2O5), [22][23][24][25][26][27] ferroelectrics (Na0.5Bi4.5Ti4O15, Na0.5Bi2.5Nb2O9, Bi4Ti3O12, KSr2Nb5O15, SrBi2Nb2O9 and K0.5Na0.5NbO3), 10,11,18,20,21,[28][29][30][31][32][33][34][35][36][37] and other robust oxides (BaMgSiO4, Sr2SnO4 and (Ca,Sr,Ba)5(PO4)3F). [38][39][40][41][42][43][44] For these materials, light-induced changes in physical properties such as refractive index, electron conductivity, magnetic properties, refractive index or absorption spectrum can be regarded as the digital code of "0" and "1", respectively. 30,45 Correspondingly, the recorded information can be read out via measuring the change of those physical parameters such as luminescence intensity, refractive index and electrical conductivity.…”

Rapid high-contrast reversible coloration of Ba3MgSi2O8:Pr3+ photochromic materials for rewritable light-printing

“…Obviously, BMS:0.5%Pr 3+ 16 h H 2 ceramics only need 3 s to acquire 64.4% of its maximum value, which is regarded as one of the shortest time for inorganic photochromic materials. 15,17,18,48–51 The lower phonon energy of BMS:0.5%Pr 3+ 16 h H 2 promotes the electron transfer probability with phonon-assistance for obtaining the fast response time. 52 Apart from strong coloration contrast and fast response, good reversibility and a stable-colored state are also needed for photochromic materials in practical applications.…”

Stimulus‐Responsive Lanthanide MOF Materials Encapsulated with Viologen Derivatives: Characterization, Photophysical Properties and Sensing on Nitrophenols

“…They are sensitive to ultraviolet light and show reversible photochromic behavior, so can be used as secret inks. Photochromic MOFs can be synthesized by doping, inlaying or loading photochromic materials [19] . Common photochromic materials are generally divided into three types: organic materials, inorganic materials, and inorganic‐organic hybrid materials [20] .…”

“…Photochromic MOFs can be synthesized by doping, inlaying or loading photochromic materials. [19] Common photochromic materials are generally divided into three types: organic materials, inorganic materials, and inorganic-organic hybrid materials. [20] To our knowledge, 1,1'-disubstituted-4,4'bipyridinium dications (viologens) are typical organic photochromic materials, which were first discovered and named by Michaelis in 1932.…”