Photoluminescence and EPR studies of narrowband ultraviolet B emitting trivalent gadolinium activated CaLaAl3O7 phosphors

Synthesis and study of optical properties of a Gd3+‐doped NaYF4 phosphor for phototherapy lamp application

“…Therefore, many scholars have described the use of Gd 3+ ‐doped inorganic luminescent materials for phototherapy lamp applications. Examples are MgF 2 :Gd 3+ [17], NaYF 4 :Gd [18], Y 7 O 6 F 9 :Pr 3+ ,Gd 3+ [19], LiSrAlF 6 :(5%)Ce,(1%)Gd [20], BaAl 2 O 4 :Gd 3+ [21], Gd 3+ ‐doped SrZrO 3 [22], Gd‐doped NaBaPO 4 [23], and Gd 3+ ‐doped ZrO 2 [24].…”

Achieving multicolour and multimodal luminescence in Ca3Al2Ge3O12:Bi3+/Ln3+(Ln = Tb, Eu, Sm, and Dy) persistent phosphors for multiple applications

“…Persistent luminescent (PersL) materials present the fascinating ability to store excitation energy, a special optical phenomenon in which the material has the ability to emit light for seconds to hours after the excitation source (e.g., ultraviolet (UV), X-ray, gamma rays or visible light) has been removed. [1][2][3][4][5] At the other end of the spectrum in the shorter wavelength UV region (200-400 nm), especially UVB persistent phosphors, which exhibit excellent afterglow properties and can be activated by a wide range of available light sources (e.g., UV lamps) given the advantage of their excellent invisibility (invisible to the naked eye), UV luminescent materials are promising for a wide range of applications in environmental, biological and medical fields, [6][7][8][9][10][11] however, for some important new applications (anti-counterfeiting or information storage), this phosphor has not yet been fully explored. [12][13][14] Counterfeiting phenomena are widespread in all aspects of economics and social life and pose a global security threat to both individuals and society.…”