Bright yellow up-conversion in a LaOF containing Er3+ and Yb3+

2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD) Pub Date : 2016-07-06 DOI:10.1109/AM-FPD.2016.7543638

Keito Ohyama, T. Nonaka, Shin-ichi Yamamoto

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Abstract

LaF₃, metal-oxide system for use as the base material, containing Er³⁺ and Yb³⁺ for host crystal of rare-earth (RE) elements were prepared by solid state reaction method and its upconversion (UC) luminescence excited by 980 nm laser was studied. The effects of firing temperature, LaF3 with Er³⁺, Yb³⁺ concentrations on the UC emission behavior were examined. The LaOF product sintered at ffOO °C contained LaF₃ phases and exhibited strong green and red emissions arising due to the ²H_11/2, ⁴S_3/2→⁴Ii_5/2 and ⁴F_9/2→⁴Ii_5/2 transitions for Er³+ ion, respectively. Bright yellow color by the mixing of green and red colors was observed in the LaOF product doped with 0.01 at.% Er³⁺ and 0.01 at.% Yb³⁺. It suggests that LaOF : Er³⁺, Yb³⁺ is a potential material for the yellow upconversion phosphor.

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含有Er3+和Yb3+的LaOF中的亮黄色上转换

采用固相反应法制备了以Er3+和Yb3+为基体材料的金属氧化物体系LaF3，并对其在980 nm激光激发下的上转换发光进行了研究。考察了烧成温度、LaF3与Er3+、Yb3+浓度对UC发射行为的影响。在ffOO°C下烧结的LaOF产物中含有LaF3相，Er3+离子分别发生2H11/2、4S3/2→4Ii5/2和4F9/2→4Ii5/2跃迁，产生强烈的绿色和红色辐射。在0.01 at掺杂的LaOF产物中观察到绿色和红色混合的亮黄色。% Er3+和0.01 at。% Yb3 +。这表明LaOF: Er3+， Yb3+是一种有潜力的黄色上转换荧光粉材料。

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2016 23rd International Workshop on Active-Matrix Flatpanel Displays and Devices (AM-FPD)

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