Preparation and upconversion luminescence properties of Ba5SiO4Cl6: Yb3+, Er3+, Li+ phosphors | Zendy

Yang Jian-Zhi | Zendy; Qiu Jianbei | Zendy; Yang Zheng-Wen | Zendy; Zhiguo Song | Zendy; Yong Yang | Zendy; Zhou Da-Cheng | Zendy

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Preparation and upconversion luminescence properties of Ba5SiO4Cl6: Yb3+, Er3+, Li+ phosphors

Author(s) -

Yang Jian-Zhi,

Qiu Jianbei,

Yang Zheng-Wen,

Zhiguo Song,

Yong Yang,

Zhou Da-Cheng

Publication year - 2015

Publication title -

acta physica sinica

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.199

H-Index - 47

ISSN - 1000-3290

DOI - 10.7498/aps.64.138101

Subject(s) - phosphor , luminescence , photon upconversion , materials science , excited state , doping , ion , excitation , emission intensity , analytical chemistry (journal) , optoelectronics , photochemistry , atomic physics , chemistry , physics , organic chemistry , quantum mechanics , chromatography

The Ba5SiO4Cl6: Yb3+, Er3+, Li+ phosphor has been prepared by high temperature solid state reaction, and their upconversion (UC) luminescence properties and mechanisms are investigated. The UC emission bands located at 525 nm (2H11/24I15/2), 548 nm (4S3/24I15/2), and 662 nm (4F9/24I15/2) due to Er3+ are observed under the excitation of 980 nm. UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+ phosphors is increased with increasing Er3+ and Yb3+ concentration due to the energy transfer enhancement of Er3+ and Yb3+. Based on the relations of UC luminescence intensity and excitation light power, the UC luminescence mechanisms are discussed. At a low excited power (below 0.8 W), the two-photon processes are involved in both green and red UC emission mechanisms. When the power exceeds 0.9 W, the green and red UC emission is a four-photon process. One new and interesting UC emission mechanism may occur in the Ba5SiO4Cl6: Yb3+, Er3+ phosphors. Both green and red UC emissions at a higher pumping power are generated by photon avalanche UC process. Influence of Li+ doping on the UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+ phosphors is investigated. Result demonstrates that Li+ ion doping could enhance the UC luminescence of Ba5SiO4Cl6: Yb3+, Er3+, which is attributed to the distortion of the local symmetry around Er3+.

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