KSr4(BO3)3:Pr3+: A new red-emitting phosphor for blue-pumped white light-emitting diodes

Abstract

A novel red phosphor KSr 4 (BO 3) 3 : Pr 3+ was prepared by using a solid-state reaction method, and its photoluminescence and charge compensator effect (Li +) were investigated. The synthesized phosphors were characterized by X-ray diffraction (XRD), scanned electron microscope (SEM) and photoluminescence (PL) spectroscopy. The as-prepared material indicates that Pr 3+ ions occupy Sr 2+ sites in the lattice of KSr 4 (BO 3) 3 with micron-scale irregular morphology. Their excitation bands at 449, 475 and 487 nm are originated from the transitions of 3

Preparation, structural and spectroscopic study of sol-gel-synthesized $$\hbox {Cr}^{3+}$$:$$\hbox {Al}_{2}\hbox {O}_{3}$$ powder

“…PL lifetime of 2 E → 4 A 2 transition experimental curves showed a non-exponential behavior. The experimental data were fitted to the equation [42][43][44] where I(t) is the PL intensity at a time t, I 0 is the PL at t = 0 , 1 is the fast and 2 is the slow decay components. A 1 and A 2 are the amplitude related to each decay components [43].…”

“…A 1 and A 2 are the amplitude related to each decay components [43]. The average lifetimes were calculated using the relation [43,44] (1) For ruby, the long decay time related to the single chromium ion emission and the fast decay time related to the pairs and four paired ions (Nlines) [45,46] are shown in Figure 9b. Since our samples are in relatively high chromium concentration, an increase in the number of pairs is also observed [45,46].…”

Growth and characterization of Na3R(BO3)2 (R = La–Gd) borates: crystal structure, high-temperature behavior, and optical properties

“…60 For Na 3 Gd 1− x Pr x (BO 3 ) 2 , it is common that increasing the Pr concentration leads to quenching as a result of the cross-relaxation process. 69,77,78 The quenching in Na 3 Gd 1− x Sm x (BO 3 ) 2 is due to the non-radiative energy transfer from excited Sm 3+ ion to non-excited Sm 3+ ions or opening of cross-relaxation channels. 69,77,78…”

“…69,77,78 The quenching in Na 3 Gd 1− x Sm x (BO 3 ) 2 is due to the non-radiative energy transfer from excited Sm 3+ ion to non-excited Sm 3+ ions or opening of cross-relaxation channels. 69,77,78…”

CaSn(OH)6 hydroxides, CaSnO3 oxides and CaSnF6 fluorides: Synthesis and structural filiation. Cationic environment impact on Pr3+ doped compounds luminescence

“…Surprisingly, the luminescent properties of rare earth doped perovskite related structure are not largely reported yet [1][2][3][4][5][6][7][8][9]. However, promising results describe the photoluminescence of praseodymium doped perovskite as novel materials for multifunctional devices as the absorption lines of this rare earth overlaps the emission of commercial blue diode [10][11][12][13][14][15][16][17][18][19].…”