Luminescence of rare-earth ions in Ca3(BO3)2

Synthesis and luminescent properties of phosphor

“…Eu 3þ energy transfer [14]. The weak peak at 395 nm is assigned to Eu 3þ 7 F 2 5 L transition, which suggested that the high quantum efficiency of the Eu 3þ luminescence excitation into the charge transfer transition (CTS) of an electron from the oxygen 2p state to a Eu 3þ 4f state [15]. It can also be observed in Fig.…”

Luminescence of Ce3+ ions in alkaline earth borophosphates

“…In the other type, the charge compensation is provided by an interstitial oxygen ion (O i ). This mechanism of charge compensation was proposed before for Ce 3+ ions in M 3 (BO 3 ) 2 (M = Ca, Sr) [23]. It is reasonable to assume that for SrBPO 5 :Ce 3+ the dominant center (Ce I ) with emission maxima at 318 and 338 nm consists of a Ce 3+ ion on an Sr 2+ site without a nearby charge compensator (Ce • Sr ).…”

Luminescent properties and performance tune of novel red-emitting phosphor CaInBO4: Eu3+

“…2 presents the excitation spectrum of representative CIBO: 0.09Eu phosphor (l em ¼ 613 nm) at room temperature. The broad absorption band centered at 256 nm originating for the chargetransfer (CT) transition from the filled 2p shell of the O 2À to the partially filled 4f shell of Eu 3þ [27]. Several sharp lines in the range of 300e500 nm corresponding to the 4fe4f transitions of Eu 3þ ions are observed in the excitation spectrum.…”