Purple photochromism in Sr2SnO4:Eu3+ with layered perovskite-related structure

Abstract

We report photochromism (PC) in Sr2SnO4:Eu3+ with layered perovskite-related structure. The Sr2SnO4:Eu3+ turned purple upon irradiation with UV light (λ < 350 nm), and the colored Sr2SnO4:Eu3+ returned to its initial colorless state when visible light (λ = 400–700 nm) was irradiated. Furthermore, the PC was strongly dependent on the firing temperature; purple color upon UV irradiation can be enhanced by increasing the firing temperature, which was attributed to an increase of the Sr vacancies in the host lattice from the results of crystal structure analysis. This suggests that controlling the lattice defect plays an important role for enhancing the PC performance.

High‐Temperature Photochromism of Fe‐Doped SrTiO3 Caused by UV‐Induced Bulk Stoichiometry Changes

“…In analogy to the voltage‐induced electrochromism due to a redistribution of oxygen vacancies in Fe:STO (electrocoloration), one might thus also expect existence of light‐induced photochromism. Photochromic effects based on color centers have been frequently reported for oxides with metals (SrTiO 3 , TiO 2 , and many other oxides) . However, those photochromic experiments usually take place around room temperature or much below and the corresponding phenomena are not caused by oxygen stoichiometry changes of the bulk under illumination.…”

Reversible upconversion switching for Ho/Yb codoped (K,Na)NbO3 ceramics with excellent luminescence readout capability

“…Within the last few years, there are several reports on inorganic photochromic compounds, such as TiO 2 , WO 3 , MoO 3 , Fe‐doped SrTiO 3 , etc . Some new inorganic bulk materials with outstanding photochromic performance have also been recently exploited, including BaMgSiO 4 :Eu 2+ , Sr 2 SnO 4 :Eu 3+ , Mg 4 Ga 8 Ge 2 O 20 :Cr 3+ , Pb(Zr,Ti)O 3 , and so forth . Unfortunately, these inorganic materials exhibiting luminescent modulation or switching behavior are rather rarely observed in literature, except for only metal oxide V 2 O 5 .…”

“…[8][9][10][11] Some new inorganic bulk materials with outstanding photochromic performance have also been recently exploited, including BaMgSiO 4 :Eu 2+ , Sr 2 SnO 4 :Eu 3+ , Mg 4 Ga 8 Ge 2 O 20 :Cr 3+ , Pb(Zr,Ti)O 3 , and so forth. [12][13][14][15] Unfortunately, these inorganic materials exhibiting luminescent modulation or switching behavior are rather rarely observed in literature, except for only metal oxide V 2 O 5 . 16 Therefore, it is of great importance to develop new inorganic photochromic materials with high luminescent switching performance from both a scientific and a practical point of view.…”

Reversible luminescence modulation of Ho‐doped K0.5Na0.5NbO3 piezoelectrics with high luminescence contrast

“…The advantages of inorganic photochromic materials have stimulated a revival of interest in recent years. Many new inorganic photochromic materials are discovered by researchers, such as MoO 3 , WO 3 , Sr 2 SnO 4 :Eu, BaMgSiO 4 :Eu, and Pb(Zr,Ti)O 3 etc . Nevertheless, these inorganic materials mentioned above hardly exhibit luminescent switching performance.…”