溶膠凝膠法製備摻雜銪、釤之鍶矽酸鹽螢光體發光特性研究

本研究利用溶膠凝膠法一次燒成製備Sr2SiO4:Re(Re=Eu3+、Sm3+)螢光體與溶膠凝膠法二次燒成製備Sr2SiO4:Eu2+，探討在不同的製程參數下對其微結構與光激發光特性之影響。在大氣環境中燒成的Sr2SiO4:Eu3+螢光體，發現隨著激活劑濃度的增加，發光強度也跟著變強。以618 nm 波長監測下，得到395 nm處有最強的激發峰，再以395 nm激發得到紅色範圍的578 nm、587 nm、589 nm、594 nm、612 nm、618 nm、651 nm、654 nm、686 nm、701 nm等放射峰，符合5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F3、5D0→7F4等電子遷移。在大氣環境中燒成的Sr2SiO4:Sm3+螢光體，以598 nm波長監測下，得到405 nm處有最強的激發峰，再以405 nm激發得到橘紅色範圍的561 nm、569 nm、598 nm、604 nm、607 nm、644 nm、650 nm等放射峰，符合4G5/2→6H5/2、4G5/2→6H7/2、4G5/2→6H9/2等電子遷移。在還原氣氛下燒成的Sr2SiO4:Eu2+螢光體，以327 nm激發得到放射峰495 nm的4f7(8S7/2)→4f6(7Fj)5d1遷移之藍綠光放射，屬於Eu2+九配位發光中心;以385 nm激發得到放射峰554 nm的4f7(8S7/2)→4f6(7Fj)5d1遷移之黃綠光放射，屬於Eu2+十配位發光中心。

關鍵字

螢光體；溶膠凝膠法； Sr2SiO4

並列摘要

The research is attempted to synthesize Sr2SiO4:Re(Re=Eu3+、Sm3+) phosphor by using one step fired sol-gel method and Sr2SiO4:Eu2+ by using two step fired sol-gel method. Study several controlling factors that could affect the phosphor’s luminescence characteristics, such as firing temperature, firing time, doped with different amounts of the activator. Under air atmosphere to synthesize Sr2SiO4:Eu3+ phosphors, we could observe the intensity of emission spectrum would trend to increase when the molar fraction of Eu was enhanced. The excitation spectrum monitored at 618 nm, obtained the strongest excitation peak at 395 nm, and the emission spectrum excited by 395 nm, showed red light wavelength range that were 578 nm、587 nm、589 nm、594 nm、612 nm、618 nm、651 nm、654 nm、686 nm、701 nm, they were correspond to 5D0→7F0、5D0→7F1、5D0→7F2、5D0→7F3、5D0→7F4 transitions, respectively. Under air atmosphere to synthesize Sr2SiO4:Sm3+ phosphors, the excitation spectrum monitored at 598 nm, obtained the strongest excitation peak at 405 nm, and the emission spectrum excited by 405 nm, showed orange light wavelength range that were 561 nm、569 nm、598 nm、604 nm、607 nm、644 nm、650 nm, they were correspond to 4G5/2→6H5/2、4G5/2→6H7/2、4G5/2→6H9/2 transitions, respectively. Under reduction atmosphere to synthesize Sr2SiO4:Eu2+ phosphors, the emission spectrum excited by 327 nm, showed blue-green emission peak at 495 nm that due to 4f7(8S7/2)→4f6(7Fj)5d1 transition of nine oxygen coordinated Eu2+ site ; the emission spectrum excited by 385 nm, showed yellow-green emission peak at 554 nm that due to 4f7(8S7/2)→4f6(7Fj)5d1 transition of ten oxygen coordinated Eu2+ site.

並列關鍵字

phosphor ； sol-gel method ； Sr2SiO4

參考文獻

[2] 黃建晃, 新世代節能環保照明—白光LED, 生活科技教育月刊, 三十八卷

[29] 許家豪, 矽酸鍶與鋁酸鍶螢光材料之製備與螢光特性分析, 碩士論文,

國立台灣大學化學工程研究所, 台北, 2006。

頁,2009年3月

[5] 陳嬿如,Sol-Gel法製備Mg2SiO4:Eu3+螢光體與其光激發光特性之研究,

國際替代計量

溶膠凝膠法製備摻雜銪、釤之鍶矽酸鹽螢光體發光特性研究

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