Synthesis and luminescence of sub-micron sized Ca3Sc2Si3O12:Ce green phosphors for white light-emitting diode and field-emission display applications

Luminescent properties of UV excitable blue emitting phosphors MSr4(BO3)3:Ce3+ (M = Li and Na)

“…It is believed that the concentration quenching of the present compounds is mainly due to the non-radiative transition among the Ce 3+ ions, which may occur because of the exchange interaction, radiation re-absorption, or multipole-multipole interaction. The exchange interaction is generally responsible for the energy trans- fer of forbidden transitions and the typical distance is about 5Å [11]. Because the 5d-4f transition of Ce 3+ ion is allowed and the PLE and PL spectra do not overlap ( Fig.…”

“…Novel cubic borates MSr 4 (BO 3 ) 3 (M = Li or Na) have been firstly synthesized by Wu, but there are few reports on the luminescent properties of rare earth ions doped these compounds [9,10]. Among rare earth ions, Ce 3+ is an efficient activator for the phosphors applied in the field of lighting because the luminescence color of the Ce 3+ doped phosphor can be tuned from red to UV region, which due to the 5d energetic position of Ce 3+ is sensitive to the host lattice [11,12]. In this work, photoluminescent properties of Ce 3+ doped MSr 4 (BO 3 ) 3 (M = Li or Na) were investigated in detail, which exhibits bright blue emission under the excitation of UV light.…”

Inorganic Phosphor Materials for Lighting

“…This material appears to be a useful phosphor. An alternative synthesis of this phosphor (based on the sol-gel technique) has been described by Liu et al [128].…”

Blue-emitting phosphor M2B5O9Cl: Eu2+ (M Sr, Ca) for white LEDs

“…It is estimated that even if only 50% SSL were to be achieved and displaced current white-lighting technologies, the electricity used for lighting would be cut by 62% [1,2]. However, commercial white light emitting diodes (w-LEDs) produced by combining a blue LED chip with yellow-emitting phosphor cannot meet the requirement of general illumination due to their poor color rendering index (<75) and unsatisfactory high color temperature (>4500 K) because of weak red emission [3,4]. One of the feasibilities to overcome these problems and to obtain the w-LEDs with high performance is using near-ultraviolet LEDs (n-UV LEDs) pumping red, green and blue tricolor phosphors, which provides an excellent color rendering index and the tunable color temperature [5].…”