Mechanoluminescence of Dy doped strontium aluminate nanophosphors

UV excited green luminescence of SrAl2O4:Eu2+, Dy3+ nanophosphor

“…The principle peaks were identified as the (011), ( 211), (220), (211), and (031) planes that characterize the where D is the average crystallite size, k is Scherrer's constant equal to 0.90, b is the full-width at half-maximum (FWHM), and h is the diffraction angle. The size of the particle computed by using the Debye-Scherrer formula was 25 nm [18]. SrAl 2 O 4 undergoes a phase transition from monoclinic to hexagonal at 800°C.…”

Preparing and testing the reliability of long-afterglow SrAl2O4:Eu2+, Dy3+ phosphor flexible films for temperature sensing

“…The TC and XLG tests led to minimal destruction of the crystal structure, and the small band widths and absence of a broad background in the diffractogram indicate that the phosphors retained their high crystallinity. However, a clear change was observed aer the HT aging tests, whereby the SAOED is hydrolyzed to new substances and the principal crystalline phase of the phosphor transforms to Sr 3 -Al 2 (OH) 12…”

“…This indicates that the SAOED is not stable in a high humidity environment; instead, it will decompose into a mixture of Sr 3 Al 2 (OH) 12 and SrAl 3 O 5 (OH), and strontium ions will react with carbon dioxide in the air to form strontium carbonate. Fig.…”

“…4,5 Recently, the SrAl 2 O 4 :Eu 2+ , Dy 3+ phosphor has received considerable research attention because of its stability and environmentally friendly properties, with various applications such as emergency signage, watch dials, luminous paints, traffic signs, and children's toys. [6][7][8][9][10] There are many techniques to manufacture strontium aluminate, such as sol-gel synthesis, 7 continuous solid-phase synthesis, 11 combustion, 12 and hightemperature solid-state method. 13 The high-temperature solidstate method synthesizes the phosphor with the highest crystallinity.…”

Influence of fluxing agent on the luminescence properties of SrAl2O4:Eu2+ nanophosphors

“…We have The average crystallite size was determined from the XRD pattern parameters according to the Debye Scherrer equation D = kλ/βcosθ, where D is the average crystallite size, k is Scherrer's constant equal to 0.90, β is the full-width at halfmaximum (FWHM), and θ is the Bragg's angle. For the sample having 7.5% of H 3 BO 3, the size of the particle computed by using Debye Scherrer formula was 45 nm[17][18].…”