Bright green-emitting nanophosphor for dual-mode up/down-conversion luminescence

Title
Bright green-emitting nanophosphor for dual-mode up/down-conversion luminescence
Authors
장호성우경자임기필
Keywords
nanophosphor; upconversion; downconversion; photoluminescence
Issue Date
2012-12
Publisher
EL2012 e-proceedings
Abstract
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 ultraviolet light.
URI
http://pubs.kist.re.kr/handle/201004/44369
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KIST Publication > Conference Paper
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