Co-precipitation synthesis and optical properties of green-emitting Ba2MgSi2O7:Eu2+ phosphor

Hydrothermal synthesis, characterization, and color-tunable luminescence properties of Bi2MoO6:Eu3+ phosphors

“…With the further increase the doping concentration to 20%, the luminescent intensity of Eu 3+ ions sharply decreased due to the concentration quenching effect. This result indicates that there is an efficient energy transfer from MoO 6 6 to Eu 3+ ions in Bi 2 MoO 6 :Eu 3+ phosphors under UV light excitation. 26 The doping concentration of luminescent centers is an important factor inuencing the phosphor performance.…”

“…This approach provides white LEDs with excellent color rendering index, but a similar drawback arises as in uorescent lamps, owing to the strong reabsorption of the blue light by the red and green phosphors. 6 In this regard, a single-phase full-color emitting phosphor, which can be avoided by using single emitting component phosphors with higher luminous efficiency and excellent color rendering index, is considered to be potentially useful because of small color aberration, high color rendering, and low cost. Therefore the researches on single-phase full-color emitting phosphors are rapidly increasing and have become one of the hot research topics in the phosphor community.…”

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

“…After reaching a threshold value when the distance reaches the critical distance, the PL intensity decreases, as shown in Figures 5a&b. It could be explained by the quenching phenomenon by concentration [31][32][33]. To further study how the luminescent quenching phenomenon occurs, the critical distance (Rc) has been calculated by following the Blasse equation [31,34,35]:…”

Thermally Stable Phosphor KBa2(PO3)5:Eu2+ with Broad-Band Cyan Emission Caused by Multisite Occupancy of Eu2+

“…The calculated results of various Eu 2+ concentration samples are 747.97, 707.23, 683.55, 679.09, and 632.42 ns for x = 0.005, 0.01, 0.02, 0.03, and 0.04, respectively. Such a magnitude lifetime of several hundred nanoseconds was usually observed in many other Eu 2+ -doped phosphors, such a s L i 2 S r S i O 4 : E u 2 + , C e 3 + , 5 6 C a 2 B O 3 C l : E u 2 + , 5 7 Ba 2 MgSi 2 O 7 :Eu 2+ , 58 and Sr 3 SiO 5 :Eu 2+ . 59 On the other hand, gradually decreasing the lifetime from 747.97 to 632.42 ns with increasing Eu 2+ concentration suggests that concentration quenching happened.…”