新穎螢光粉用於白光LED封裝之製備與發光特性研究

發光二極體(light-emitting diodes, LEDs)是近幾年迅速崛起的固態發光元件，因其具有照明壽命長、輕量、節省電力、熱損耗低等優點，故可作為取代白熾燈泡、螢光燈、高壓放電燈等的新技術及產品。由於在螢光粉混合調光的過程中，會因為缺乏紅色放光的貢獻，而導致其演色指數較低。因此目前有許多研究著重於開發新穎的紅光螢光粉來解決這個問題。本研究以固態反應法在空氣氣氛下成功合成摻雜銪離子與釤離子之磷酸鹽、矽酸鹽、硼酸鹽螢光粉，如NaYPO4F:Eu3+, La5BSi2O13:Eu3+, Ca2Y8(SiO4)6O2:Sm3+ 和 La6Ba4Si6O24F2:Sm3+，並且透過各式儀器分析探討其結構與發光特性，如使用X光繞射及結構精算來探討其晶格大小、晶格常數與離子半徑之關係；光致發光譜、變溫光致發光譜、電致發光譜、時間解析光譜則是分析螢光粉的發光特性在不同的電流、溫度、不同摻雜濃度下其光譜性質造成的影響。在應用方面，本研究也對提及的螢光粉做LED封裝測試，並探討其色溫、演色指數、CIE色度座標等LED特性分析。

關鍵字

螢光粉；發光二極體

並列摘要

In recent years, white light-emitting diodes (W-LEDs) has become attractions due to their high brightness, environmentally friendly, long lifetime, well energy efficiency, and less power consumption. Therefore, it is considered as a new next generation light source. However, they fail to achieve higher color rendering because of the lack of red component in blending of different color phosphors. Hence, it is necessary to find red emission phosphors for application. In this study, we discussed on two kinds of rare earth ions and successfully synthesized the samples via a high temperature solid state reaction at air atmosphere. The rare earth ion as mentioned in this thesis are europium and samarium, which could emit red and orange-red emission light when excited by n-UV chip or blue LED chip. To further discussion, we used a series of analysis such as X-ray diffraction, crystal structure refinement, photoluminescence (PL) spectra, temperature-dependence photoluminescence (TL) spectra, EL spectra, decay lifetime, diffuse reflection spectra, LED fabrication, CIE coordinate and so on to identify the luminescent properties of NaYPO4F:Eu3+, La5BSi2O13:Eu3+, Ca2Y8(SiO4)6O2:Sm3+ and La6Ba4Si6O24F2:Sm3+ phosphors.

並列關鍵字

phosphor ； LED

參考文獻

[1] M. S. Shur, R. Zukauskas, Solid-state lighting: toward superior illumination, Proceedings of the IEEE, 93 (2005) 1691-1703.

[2] L. L.n.d. Wikipedia., in.

[4] J. Sun, J. Lai, J. Zhu, Z. Xia, H. Du, Luminescence properties and energy transfer investigations of Sr2B2O5:Ce3+, Tb3+ phosphors, Ceramics International, 38 (2012) 5341-5345.

[5] I. V. B. Maggay, P. C. Lin, W. R. Liu, Enhanced luminescence intensity of novel red-emitting phosphor-Sr3Lu2(BO3)4:Bi3+, Eu3+ via energy transfer, Journal of Solid State Lighting, 1 (2014) 13.

[6] I. V. B. Maggay, P. C. Lin, W. R. Liu, Investigation of luminescence properties and the energy transfer mechanism of Li6Lu(BO3)3:Ce3+, Tb3+ green-emitting phosphors, RSC Advances, 5 (2015) 5591-5597.

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新穎螢光粉用於白光LED封裝之製備與發光特性研究

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