Bright green-emitting nanophosphor for dual-mode up/down-conversion luminescence
- Bright green-emitting nanophosphor for dual-mode up/down-conversion luminescence
- 장호성; 우경자; 임기필
- nanophosphor; upconversion; downconversion; photoluminescence
- Issue Date
- EL2012 e-proceedings
- Dual-mode green-emitting nanophosphors showing upconversion and downconversion luminescence were reported.
Green-emitting Gd-substituted β-NaYF4:Yb,Er upconversion nanophosphor was used as a core material and greenemitting
β-NaGdF4:Ce,Tb was served as a shell material. Upconversion photoluminescence intensity was enhanced by
about 11 times due to formation of the luminescent shell, and therefore strong green emission peaks attributed to
2H11/2,4S3/2 → 4I15/2 transitions of Er3+ ions were observed under the excitation of 980 nm near infrared light. In addition,
bright green light was generated from 5D4 → 7F5 transition of Tb3+ ions in the shell under the exciation of 254 nm
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