成果归属作者：

夏志国

成果归属机构：

材料科学与工程学院

作者：

Xia, Zhiguo ; Liu, Ru-Shi

单位：

China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China;Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan

摘要：

A series of new luminescent emission-tunable phosphors Ca2Al3O6F:Ce3+,Tb3+ have been synthesized by a high temperature solid-state reaction. The UV-vis reflectance, photoluminescence emission and excitation spectra, the lifetime, and the effect of Tb3+ concentration are investigated in detail. The intense green emission is realized in the Ca2Al3O6F:0.08(3+),0.05Tb(3+) phosphors on the basis of the highly efficient energy transfer from Ce3+ to Tb3+ with an efficiency of over 90%. The energy transfer mechanism from Ce3+ to Tb3+ in the Ca2Al3O6F host was ascribed to the exchange interactions, and the formation of the Ce-Ce clusters and Ce-Tb clusters should be the reason for the high energy transfer efficiency. The critical distance of the energy transfer has also been calculated by the concentration-quenching method. These results indicate that the Ca2Al3O6F:Ce3+,Tb3+ phosphors have potential applications as a near UV-convertible phosphor for white light-emitting diodes because of its broad excitation in the near-ultraviolet range and the efficient green emission light.

基金：

National Natural Science Foundations of China [51002146, 41172053]; Ph.D. Programs Foundation of Ministry of Education of China [20090022120002]; Fundamental Research Funds for the Central Universities [2010ZY35, 2011YYL131]; National Science Council of Taiwan [NSC 97-2113-M-002-012-MY3, NSC 97-3114-M-002-005]

语种：

英文

DOI：

10.1021/jp304722z

来源：

JOURNAL OF PHYSICAL CHEMISTRY C,2012(29):15604-15609.

出版日期：

2012-07-26

提交日期：

2017-12-14

引用参考：

Xia, Zhiguo; Liu, Ru-Shi. Tunable Blue-Green Color Emission and Energy Transfer of Ca2Al3O6F:Ce3+,Tb3+ Phosphors for Near-UV White LEDs[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2012(29):15604-15609.