摘要
脉冲激光溅射法 (PLD) ,作为一种制备高质量薄膜的方法 ,被广泛地用于制备超导、铁电等薄膜。用PLD法制备的Yb3+ 和Er3+ 共掺杂氟化物薄膜的上转换发光性质。在 978nmLD激发下 ,薄膜发出强烈的橙色光 ,用日立 -F45 0 0光谱仪测量了其上转换发光光谱 ,观测到了Er3+ 很强的2 H9/2 →4 I1 5/2 (4 0 8nm) ,2 H1 1 /2 →4 I1 5/2 (5 2 0nm) ,4 S3/2 →4 I1 5/2 (5 5 0nm)和4 F9/2 →4 I1 5/2 (65 0nm)跃迁发射峰。给出了上转换发光强度随激发强度的关系 ,分析了其上转换发光机制及紫色上转换发光增强的原因。
Yb 3+ Er 3+ co doped amorphous Zn 0.3 Al 0.25 Pb 0.3 Li 0.1- x Yb y Er x F 2.05+2 x +3 y fluoride films were prepared by pulsed laser deposition (PLD). Very intense violet, green, red and considerably strong ultraviolet (UV) up conversion emissions were observed under the infrared excitation at 950 nm. In comparison with other Yb 3+ Er 3+ co doped systems reported previously, the violet and UV emissions of the film are enhanced greatly, which is attributed to the intensification of APTE (Addition de Potons par Transfer d′ Energie) between Yb 3+ and Er 3+ in the films induced by the enrichment of Yb concentration.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2001年第6期526-528,共3页
Journal of the Chinese Society of Rare Earths
基金
国家重点基础研究发展规划 (973稀土G19980 613 0 9)
中国科学院重点基金
国家自然科学基金资助项目 (5 9872 0 42 )
