Luminescent properties of Eu3+ ions in CaB6O10 polycrystals

Synthesis, structural characterization, and photoluminescence properties of Eu3+‐doped Mg3‐xEux(BO3)2 phosphor

“…Each spectrum has six well resolved bands due to the transitions of excited states, 5 D 0 to the ground state 7 F j (j:0, 1, 2, 3) in the 4f 6 configuration of Eu 3+ ions. These transitions represent as 5 D 0 → 7 F 0 , 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 , 5 D 0 → 7 F 4 , 5 D 0 → 7 F 5 ve 5 D 0 → 7 F 6 transitions at all compounds as luminescence data . The most intensive transition band dominated at 630 nm represents to the magnetic dipole transition of 5 D 0 → 7 F 2 , as red transition, which is called as hyper sensitive transition, which is directly related to the host lattice .…”

“…The six sharp bands are located in the longer wavelength region related to the intra‐configurational f–f transitions of Eu 3+ ions. These transitions are the forbidden Eu 3+ transitions represent as 5 D 4 (318 nm), 5 L 7 (338 nm), 5 L 6 (380 nm), 5 D 3 (400 nm), 5 D 2 (420 nm), and 5 D 1 (480 nm) …”

“…These transitions represent as 5 D 0 → 7 F 0 , 5 D 0 → 7 F 1 , 5 D 0 → 7 F 2 , 5 D 0 → 7 F 3 , 5 D 0 → 7 F 4 , 5 D 0 → 7 F 5 ve 5 D 0 → 7 F 6 transitions at all compounds as luminescence data . The most intensive transition band dominated at 630 nm represents to the magnetic dipole transition of 5 D 0 → 7 F 2 , as red transition, which is called as hyper sensitive transition, which is directly related to the host lattice . Moreover, the optimal concentration or the quenching concentration of europium‐doped magnesium borate compound has been determined as x = 0.010, where the maximum emission intensity is achieved when excited at 394 nm.…”

“…Eu 3+ ion is one of the most popular and efficient dopant to use for a wide range of applications such as laser and luminescent materials because europium ions show good emissions related to electronic transitions of 4f orbitals corresponding to the 5 D 0 ? 7 F J (J:1,2,3,4) transitions, [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] because of these transitions, the Eu 3+ -doped compounds have the high luminescence efficiency. Moreover, magnesium borates are good candidates as host structure owing to their low synthetic temperature and simple preparation process.…”

Synthesis, structural characterization and luminescent properties of a novel europium ternary complex Eu(2-A-4-CBA)3phen

“…The excitation and emission spectra of the complex are shown in Fig.5. In the excitation spectrum, there is an intensive broad band extending from 200 nm to 375nm, which is a charge transfer band (CTB) [20] and dominates large portion of the spectrum, corresponding to the electron transfer from oxygen/nitrogen atom 2p orbital to Eu 3+ 4f empty orbital. And the other weak excitation peak at 396 nm ( 7 F 0 → 5 L 6 ) is assigned to the intra-configurational 4f-4f transition of Eu 3+ .…”