不同摻雜量對微波燒結法製備Sr2SiO4：Eu^3+螢光粉之微結構與發光特性之影響

Effect of Eu Doping Concentrations on Micro-Structure and Optical Properties of Sr2SiO4: Eu^3+ Phosphor Prepared Using Microwave Sintering Method

楊茹媛(R. Y. Yang) ； 楊育愷(Y. K. Yang) ； 陳皇宇(H. Y. Chen) ； 張守進(S. J. Chang)

《鑛冶：中國鑛冶工程學會會刊》 55卷2期 (2011/06) Pp. 90-94

https://doi.org/10.30069/MM.201106.0009

摘要

本文以微波燒結法製備Sr2SiO4摻雜Eu^3+之螢光粉，並討論不同摻雜量（Sr2-xSiO4: xEu^3+, x=0.05, 0.1, 0.2, 0.3,）對其微結構與發光特性之影響。燒結溫度為1200℃，並持溫60min，在空氣氣氛下進行燒結，最後以自然爐冷方式冷卻。本實驗主要的分析係使用掃描式電子顯微鏡（Scanning Electron Microscope, SEM）、X-光粉末繞射儀（X-ray Diffraction, XRD）、光致發光光譜儀（Photoluminescence Spectrum, PL）探討其微結構與光學特性。本實驗結果由SEM觀察得知，銪含量x=0.1時，於燒結溫度1200℃下燒結所得之Sr2SiO4：Eu^3+螢光粉其粉末晶粒尺寸較大。在XRD分析下，皆無二次相的形成，為α-Sr2SiO4正交晶體，顯示銪摻雜量的多寡皆不會造成主體晶格的變化。其中，光致發光光譜儀係以λex= 395 nm作為入射激發光源（Excitation），可於617nm的波長處產生明顯的放射光譜（Emission）。當銪含量x=0.1時，於燒結溫度1200℃下燒結所得之Sr2SiO4：Eu^3+螢光粉可得到最佳之發光強度。

關鍵字

螢光粉 ； 光致發光 ； LED ； 微波加熱法

並列摘要

In this paper, Sr2SiO4 phosphors doped with Eu^3+ (x= 0.05, 0.1, 0.2, 0.3) to substitute Sr^3+ element were synthesized by microwave sintering at 1200°C for 60 min in air. Scanning electron microscope (SEM), X-ray diffraction (XRD), and photoluminescence spectrum (PL) were utilized to analyze the micro-structure and optical properties. SEM imaging showed that the grain size of phosphor powder was larger when the doped Eu^3+ concentration was 0.1 (x=0.1). X-Ray diffraction analysis showed that the phosphors in the present study were orthorhombic structure indicating that the amount of doped europium does not change the main lattice. When λex= 395 nm, the emission spectrum was evident at the 617 nm indicating that Sr2SiO4 doped with Eu^3+ (x=0.1) had good emission intensity.

並列關鍵字

Phosphor ； photoluminescence ； LED ； microwave sintering method