Wet chemical synthesis of BiPO₄:Eu³⁺ phosphor for w‐LED application

Abstract

The synthesis of BiPO 4 :Eu 3+ phosphors has been achieved via a wet chemical process. X-ray diffraction patterns show that the phase of the as-prepared samples matches very well with the standard BiPO 4 structure. At 395 nm, the highest excitation intensity was observed. Following 395 nm excitation, two characteristic emission peaks at 592 nm and 616 nm were shown. At 0.5 mol% of Eu 3+ ions, concentration quenching occurred. The particle size is within the micrometre range, according to the scanning electron microscope magnification. The chromaticity coordinates for wavelengths 592 nm and 616 nm are (x = 0.586, y = 0.412) and (x = 0.682, y = 0.317), respectively. The findings imply that the prepared phosphor may be used to create white light-emitting diodes.

Photoluminescence characteristics of novel Sm3+ ions‐doped La1.4Al22.6O36 phosphor for n‐UV w‐LED

“…Excitation spectra of La 1.4 Al 22.6 O 36 :Sm 3+ phosphor are shown in Figure 4. Photoluminescence excitation (PLE) spectra were recorded at wavelengths 330–430 nm and monitored at 604 nm for Sm 3+ ion‐doped La 1.4 Al 22.6 O 36 phosphors with Sm 3+ ions having f–f transitions with 4 H 9/2 , 6 H 3/2 , 4 D 1/2 , 4 F 7/2 , and 4 M 19/2 from 6 H 5/2 at 347, 364, 378, 405, and 419 nm, respectively, along the PLE spectrum [27, 28]. Because of the 6 H 5/2 → 4 F 7/2 transition, the highest excitation spectra were observed at 405 nm.…”

“…Phosphor is essential in the production of w-LEDs, which are regarded as the next-generation lighting source because of their long lifetime, high efficiency, and function [5][6][7]. The upcoming aluminate phosphors have received increasing attention as an essential inorganic luminescent material due to their marked qualities such as improved luminous efficiency, superior chemical stability, and no radiation [8][9][10]. Inorganic materials doped with trivalent lanthanide ion have recently become the cynosure of scientists in the entire field of science and technology due to their excellent physicochemical properties and plausible applications in various areas such as solid-state lighting (SSL), display panels, phosphor-converted white light-emitting diodes (pc-w-LEDs), and various electronic devices [11][12][13][14].…”

Structural, morphological, and photoluminescence properties of RE (RE = Dy3+, Eu3+, Sm3+)‐doped CaAlBO4 phosphor synthesized by combustion method

“…The PL emission spectra of the Eu 3+ activated CaAlBO 4 phosphor are shown in Figure 9a. The Eu 3+ ‐doped CaAlBO 4 phosphor exhibits emission at 591 and 613 nm under excitation at 395 nm, which is attributed to the 5 D 0 → 7 F 1 and 5 D 0 → 7 F 2 electronic transitions of Eu 3+ ions, respectively [29–33]. Among these two characteristics peaks, the most intense and sharp peak is located at 613 nm.…”

Photoluminescence properties of Pb5(PO4)3Br:RE (RE = Dy3+, Eu3+ and Tb3+) phosphor synthesised using solid‐state method

“…The characteristic emission peaks of Pb 5 (PO 4 ) 3 Br:Eu 3+ phosphor are observed in the region of 580-720 nm and correspond to 5 D 0 ! 7 F J (J = 0, 1, 2, 3 and 4) transitions of Eu 3+ ions [23][24][25][26]. The emission observed at 591 and 614 nm is attributed to the 5 D 0 !…”