Luminescence properties of Eu2+-activated KMg4(PO4)3 for blue-emitting phosphor

Mechanisms of Li+Ions in the Emission Enhancement of KMg4(PO4)3:Eu2+for White Light Emitting Diodes

“…Figure presents the Li + concentration-dependent photoluminescence emission (PL) and excitation (PLE) spectra of KMg 4 (PO 4 ) 3 :0.02Eu 2+ , x Li + ( x = 0–0.06). As illustrated in Figure a, the PL spectra of the KMg 4 (PO 4 ) 3 :Eu 2+ ,Li + present a broad blue emission band extending from 400 to 525 nm and peaking at 450 nm, which is consistent with the previously reported 4f 6 5d–4f 7 transition of the Eu 2+ ions . The correlations between the normalized emission intensity, peak wavelength, and Li + concentration are depicted in the inset of Figure a, respectively.…”

“…As illustrated in Figure 2a, the PL spectra of the KMg 4 (PO 4 ) 3 :Eu 2+ ,Li + present a broad blue emission band extending from 400 to 525 nm and peaking at 450 nm, which is consistent with the previously reported 4f 6 5d−4f 7 transition of the Eu 2+ ions. 33 The correlations between the normalized emission intensity, peak wavelength, and Li + concentration are depicted in the inset of Figure 2a, respectively. It is observed that emission intensity increased with increasing Li + doping up to 0.025 mol %, wherein a maximum enhancement was achieved.…”

An efficient blue-emitting Sr5(PO4)3Cl:Eu2+ phosphor for application in near-UV white light-emitting diodes

“…6 Furthermore, the Eu 2+ ion can emit light from UV to infrared with a broad band emitting luminescence on different host matrices since the involved 5d orbital of the Eu 2+ ion is external and strongly influenced by the crystal field. 12 Due to these excellent properties, Eu 2+ ion-doped phosphors have been widely studied in LED applications. [13][14][15][16] Previous studies show that Eu 2+ ion-activated phosphors have low synthesis temperature, high thermal stability and high luminescence efficiency.…”

Highly Efficient and Thermally Stable Ba0.75Al11O17.25: Eu2+, Mn2+ Phosphor with Dual Narrowband Blue and Green Emissions: A Promising Candidate for Wide Gamut Displays

“…The emission is originated from the emitting of Eu 2+ ions and peaked at 450 nm with a relatively narrow FWHM of 51 nm. [ 25–29 ] Next, by fixing the Eu 2+ concentration of 8%, Mn 2+ ions were further codoped into the host. As we can see, besides the 450 nm emission band, the PL spectrum of the BAO: 8%Eu 2+ , y %Mn 2+ ( y = 4, 6, 8, 10, 12) samples each shows an additional green emission band peaked at 515 nm with an extremely narrow bandwidth of 27 nm, which is due to the 4 T 1 → 6 A 1 transition of Mn 2+ ions ( Figure a) and consistent with the spectra observed in Mn 2+ single doped BAO phosphors.…”