Luminescence and energy transfer of a color tunable phosphor: Tb³⁺ and Eu³⁺ co-doped ScPO₄

Abstract

The PL spectra of ScPO4:0.03Tb3+, yEu3+ (y = 0–0.05) phosphors under N-UV excitation (λex = 370 nm) and the tunable luminescence.

Luminescence properties and energy transfer in Tb3+ and Eu3+ co-doped Ba2P2O7 phosphors

“…The average decay time of Eu 3+ increases from 2.10 to 5.81 ms as the increase of the concentration of Tb 3+ from 0.02 to 0.08, the results conrmed the exist of energy transfer from Tb 3+ to Eu 3+ ions. 34,35 When the Tb 3+ beyond 8% mol, the average decay time of Eu 3+ is shortened oppositely, which is corresponding to the widely known concentration quenching effect happened in high concentration.…”

Tunable emission from LiBaBO3:Eu3+;Bi3+ phosphor for solid‐state lighting

“…The broad blue–greenish emission at 493 nm is attributed to the 4f 6 5d 1 → 4f 7 electronic dipole‐allowed transitions of Eu 2+ ions, suggesting that some of the Eu 3+ ions were reduced to Eu 2+ ion. Xu et al . also reported the coexistence of Eu 2+ and Eu 3+ emissions in LiBaBO 3 host.…”

“…Recently, solid‐state lighting based on white light‐emitting diodes (wLEDs) has become a prevailing trend in illumination technology due to the significant advantages of wLEDs, for example, high luminous efficiency, low energy consumption, long lifetime and being environmental friendliness. Therefore, there is great potential for wLEDs to be considered as next‐generation light sources . To date, wLEDs have been used widely as next‐generation solid‐state lighting (SSL) in many fields such as traffic signals, mobile phones, and residential and industrial lighting .…”

Luminescence properties and energy transfer behavior of colour-tunable white-emitting Sr4Al14O25 phosphors with co-doping of Eu2+, Eu3+ and Mn4+

“…20 The other excitation spectra monitored at 619 nm consists of the broad bands from 200 nm to 350 nm, which is generated from the charge-transfer band (CTB) between Eu 3+ and O 2À with the peak at 261 nm, and the series of narrow bands from 350 nm to 550 nm form from the f-f transition of Eu 3+ within its 4f 6 conguration. 21 The PL spectra with different excitation factors are demonstrated in Fig. 5(b).…”