A novel single-composition trichromatic white-emitting Sr3.5Y6.5O2(PO4)1.5(SiO4)4.5 : Ce3+/Tb3+/Mn2+ phosphor: synthesis, luminescent properties and applications for white LEDs

Li4SrCa(SiO4)2:Ce3+, a highly efficient near-UV and blue emitting orthosilicate phosphor

“…Co-doping of Ce 3+ -Tb 3+ -Mn 2+ or Eu 2+ -Tb 3+ -Mn 2+ are the two common strategies to achieve white light through energy transfer from sensitizers to activators in single-phase phosphors [9][10][11][12][13][14][15][16][17][18][19][20][21]. Wherein, Ce 3+ /Eu 2+ acts as a sensitizer and a emission component on the short wavelength side, whose excitation and emission bands can be tuned depending on the hosts.…”

Tunable luminescence properties and energy transfer of Ba3NaLa(PO4)3F:Tb3+,Sm3+ phosphors with apatite structure

“…In our host of Ba 3 NaLa(PO 4 ) 3 F, V ¼626.74 Â e 3 , N ¼ 6, and x c ¼0.05, therefore, the critical distance R C is calculated to be 15.86 Â e. In view of the longer distance (more than 5 Â e), the electric multipolar interaction will take place instead of exchange interaction mechanism for energy transfer between Tb 3 þ to Sm 3 þ . According to Dexter's energy transfer expressions of multipolar interaction and Reisfeld's approximation, the following formula can be obtained [29]:…”

“…This result strongly support the energy transfer behavior occur among the Tb 3 þ to Sm 3 þ pairs in Ba 3 NaLa(PO 4 ) 3 F host. In order to further evaluate the critical energy transfer distance (R C ) between the activators in the host, the critical distance of energy transfer R C was calculated by using the concentration quenching method where the critical distance R Tb-Sm between Tb 3 þ and Sm 3 þ can be estimated by the following formula suggested by Blasse [27][28][29][30]:…”

Photoluminescence properties and energy transfer behavior of Eu2+/Tb3+ co-doped Ba3Sc(PO4)3 phosphors

“…Among them, the C and Cu peaks in the spectra were attributed to the electric latex of SEM sample holder. (17) That is to say, the as-prepared Ba 3 Sc(PO 4 ) 3 Variation of the Tb 3+ concentration for the Tb 3+ emission, Eu 2+ emission and energy transfer efficiency of Eu 2+ -Tb 3+ in BSP:0.05Eu 2+ ,yTb 3+ phosphors are shown in Fig. 6.…”

“…(1)(2)(3) Presently, the commercial w-LEDs are fabricated by combining a blue InGaN chip and yellow-emittingY 3 Al 5 O 12 :Ce 3+ (YAG:Ce 3+ ) phosphor. However, this kind of w-LEDs has some disadvantages such as low color rendering index (CRI) and a high correlated color temperature (CCT) due to the lack of sufficient red emission.…”