Luminescence and Energy Transfer of Dual-Emitting Solid Solution Phosphors (Ca,Sr)₁₀Li(PO₄)₇:Ce³⁺,Mn²⁺ for Ratiometric Temperature Sensing

Abstract

A series of novel dual-emitting solid solution phosphors, (Ca,Sr) 10 Li(PO 4 ) 7 :Ce 3+ , Mn 2+ (CSLP:Ce 3+ ,Mn 2+ ), were synthesized by high-temperature solid-state method. CSLP:Ce 3+ ,Mn 2+ exhibits both Ce 3+ violet emission and Mn 2+ red emission under UV excitation. It is found that Sr 2+ partial substitution of Ca 2+ could result in enhancement of Mn 2+ emission intensity and blue-shift of Mn 2+ emission wavelength, which is due to site symmetry reduction and polyhedron expansion, respectively. The Ce 3+ −Mn 2+ energy transfer (ET) is efficient (∼90%), and the ET mechanism is dipole−dipole interaction. The application potential of CSLP:Ce 3+ ,Mn 2+ in optical thermometry was studied by exploiting the temperature sensitivity of the fluorescent intensity ratio (violet/red). It is found that the intensity ratio of the Ce 3+ and Mn 2+ emission peak linearly related to the temperature from 293 to 473 K with sensitivity of 0.40% K −1 . These results reveal that CSLP:Ce 3+ ,Mn 2+ may be a potential candidate for a luminescent ratiometric thermometer with wide temperature range.

Tuning the Bi3+-photoemission color over the entire visible region by manipulating secondary cations modulation in the ScVxP1−xO4:Bi3+ (0 ≤ x ≤ 1) solid solution

“…In most cases, realization of single Eu 2+ , Ce 3+ , Bi 3+ , or Mn 2+ ion doped tunable solid solutions is based upon how to manipulate isostructural ions that feature the same valence but different radii at the same coordination number (CN). For example, Ji et al reported the Ce 3+ tunable emission in the Ba2-xSrxSiO4:Ce 3+ (x = 0 → 1.8, λem = 391 → 411 nm) [18]; Fu et al reported the Eu 2+ tunable emission in the Sr2.97-xBaxMgSi2O8:Eu 2+ ,Dy 3+ (x = 0 → 2.0, λem = 434 → 464 nm) [19]; Dai et al showed the Eu 2+ tunable emission in the (K1-x,Nax)SrPO4:Eu 2+ (x = 0 → 0.6, λem = 446 → 498 nm) [20]; Zhang et al realized and presented the Mn 2+ tunable emission in the (Ca1-aSra)10Li(PO4)7:0.09Mn 2+ (a = 0 → 0.4, λem = 642 → 632 nm) [21]; and Kang et al recently reported the (Yx,Luy,Scz)VO4:Bi 3+ (x → y → z; λem = 566 → 576 → 635 nm) tunable solid solution [22].…”

A novel dazzling Eu3+‐doped whitlockite‐type phosphate red‐emitting phosphor for white light‐emitting diodes

“…Whitlockite β‐Ca 3 (PO 4 ) 2 and its derivatives have been extensively investigated because of their ferroelectric properties, their use for bioceramic applications, and their utility as potential phosphors for w‐LEDs . So far, some Ca 3 (PO 4 ) 2 luminescence materials, such as Ca 8 MgLu(PO 4 ) 7 : Ce 3+ , Tb 3+ , Mn 2+ , (Ca,Sr) 10 Li(PO 4 ) 7 : Ce 3+ , Mn 2+ , and Ca 8 MgY(PO 4 ) 7 : Eu 2+ , Mn 2+ have been widely studied . Moreover, Ca 8 ZnLa(PO 4 ) 7 : Eu 2+ , Mn 2+ phosphor, whose luminescence properties and energy transfer have been reported by Liu and coworkers .…”

Tunable color emission in LaScO3:Bi3+,Tb3+,Eu3+ phosphor

“…The maximum values of S a and S r are calculated to be 0.118 K −1 (473.15 K) and 0.795% K −1 (448.15 K), respectively. It is a good set of values, compared to many previous studies . So, Bi 3+ ‐Eu 3+ co‐doped LaScO 3 phosphor have good optical thermometric performance.…”