Upconversion luminescence and temperature sensing properties of Yb(MoO):Ln (Ln = Ho, Tm, Er) phosphors based on energy transfer
Yb 2 (MoO 4 ) 3 :Ln 3+ (Ln = Ho, Tm, Er) phosphors were synthesized by a hydrothermal method with further calcination. The crystal structure and morphology of the samples were characterized by X-ray diffraction and scanning electron microscopy. The effects of rare earth ion interaction in the Yb 2 (...
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Veröffentlicht in: | CrystEngComm 2023-10, Vol.25 (38), p.5452-546 |
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Zusammenfassung: | Yb
2
(MoO
4
)
3
:Ln
3+
(Ln = Ho, Tm, Er) phosphors were synthesized by a hydrothermal method with further calcination. The crystal structure and morphology of the samples were characterized by X-ray diffraction and scanning electron microscopy. The effects of rare earth ion interaction in the Yb
2
(MoO
4
)
3
:Ln
3+
phosphors on the upconversion (UC) luminescence properties and energy transfer process at different doping concentrations were discussed. It is concluded that by doping Ho
3+
, Tm
3+
, and Er
3+
in the Yb
2
(MoO
4
)
3
host, the phosphors emit orange-yellow, blue and green light, respectively, and the energy transfer from Yb
3+
→ Ho
3+
/Er
3+
and Yb
3+
→ Tm
3+
is a two and three photon process, respectively. Under the excitation of a 980 nm laser, by changing the Ho
3+
/Tm
3+
ratio in doped Yb
2
(MoO
4
)
3
, we have realized the transition of phosphors from cold white light to warm white light. The temperature sensitivity of the
2
H
11/2
and
4
S
3/2
energy levels of Yb
2
(MoO
4
)
3
:Er
3+
in the range of 323-573 K was studied by the FIR technology. The experimental results show that the maximum absolute sensitivity was 0.0081 K
−1
at 573 K and the maximum relative sensitivity was 0.01 K
−1
at 323 K. Compared with other materials, the Er
3+
doped Yb
2
(MoO
4
)
3
phosphor is an excellent optical temperature sensing material.
Yb
2
(MoO
4
)
3
:Ln
3+
(Ln = Ho, Tm, Er) phosphors were synthesized by a hydrothermal method with further calcination. |
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ISSN: | 1466-8033 |
DOI: | 10.1039/d3ce00497j |