Excellent thermal stability and high quantum efficiency orange-red-emitting AlPO4:Eu3+ phosphors for WLED application

Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

“…It is noticed that the particle size is varying from submicrometers to several micrometers. As shown in Figure 1b, both two crystalline phases AlPO4 (JCPDS 11-0500) [22] and CrO3 (JCPDS 32-0285) [21] are co-existed in the XRD of the obtained sample. In which, the peaks at 2θ = 21.9; 25.55; 28.30; 31.24, and 36.03 respectively correspond to (111), ( 020), ( 021), ( 112) and (220) planes of the orthorhombic AlPO4 structure (JCPDS 11-0500) [21,22].…”

“…As shown in Figure 1b, both two crystalline phases AlPO4 (JCPDS 11-0500) [22] and CrO3 (JCPDS 32-0285) [21] are co-existed in the XRD of the obtained sample. In which, the peaks at 2θ = 21.9; 25.55; 28.30; 31.24, and 36.03 respectively correspond to (111), ( 020), ( 021), ( 112) and (220) planes of the orthorhombic AlPO4 structure (JCPDS 11-0500) [21,22]. Figure 2 illustrates PLE and PL spectra of the AlPO4:0.3%Cr 3+ phosphor air-annealed at 1500 °C for 5h (λex = 395 nm).…”

Carbon Dots‐in‐EuAPO‐5 Zeolite: Triple‐Emission for Multilevel Luminescence Anti‐Counterfeiting

“…Previous studies have demonstrated that Eu 3+ can enter the framework of aluminophosphates by replacing Al 3+ . [25][26][27][28][29] To prove this, a series of experiments and characterizations were carried out. Fluorescence emission and excitation spectra of EuCl 3 aqueous solution were measured (Figure S5, Supporting Information).…”

“…More importantly, studies have demonstrated that Eu 3+ can enter the framework of aluminophosphate materials by substituting framework Al atoms to form red phosphors. [25][26][27][28][29] In this work, Eu 3+ is introduced into AlPO 4 -5 zeolite along with CDs by an in situ solvent-free thermal crystallization method. The prepared CDs@EuAPO-5 composite shows triple emissions trigged by two simple excitation lights, which includes pink fluorescence mainly associated with Eu 3+ , blue fluorescence and green RTP associated with CDs.…”

Advantageous Occupation of Europium(III) in the B Site of Double-Perovskite Ca2BB′O6 (B = Y, Gd, La; B′ = Sb, Nb) Frameworks for White-Light-Emitting Diodes

“…As far, RE ion activated luminescent materials have been used in various fields, including luminescent thermometers, solid-state lighting (SSL), latent fingerprint detection, field emission display, anti-counterfeiting marking, solar cells, drug delivery, and so on. − Europium­(III) (Eu 3+ ), as one of the most important members of the RE family, has attracted much interest from worldwide scholars, because the Eu 3+ -activated luminescent materials would exhibit excellent properties of good quantum yield (QY), color purity, thermal stability, strong emission, etc. as high-efficiency red-emitting phosphors due to the electric dipole of the 5 D 0 → 7 F 2 position for various optical applications, such as Ba 2 Y 5 B 5 O 17 :Bi 3+ /Eu 3+ , CaCO 3 :Eu 3+ , AlPO 4 :Eu 3+ , Ca 5 (PO 4 ) 2 SiO 4 :Eu 3+ , and Sr 3 ZnTa 2 O 9 :Eu 3+ . − Particularly, Eu 3+ -activated luminescent materials have been promising for white-light-emitting diodes (WLEDs) as a red-emitting phosphor based on red–green–blue (RGB) theory, which could achieve high color rendering index (CRI > 80) and low correlated color temperature (CCT < 7000 K). It not only overcomes the shortcomings of the conventional method of a yellow-emitting phosphor (Y 3 Al 5 O 12 :Ce 3+ ) covered on a blue chip but also maintains the superior performances of long service time, energy-saving, high luminous efficiency, good color purity, and so on. − Briefly, there is still a certain value in investigating Eu 3+ -activated luminescent materials and their potential applications in the future.…”