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稀土摻雜熒光玻璃的制備與性能研究
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深圳大學(xué)光電工程學(xué)院,,,深圳大學(xué)光電工程學(xué)院,,,

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Preparation and Properties of Low Melting Temperature Phosphor Glass Thick Films for White LEDs
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College of optoelectronic engineering,Shenzhen University,College of Physics and Energy,Shenzhen University,College of Physics and Energy,Shenzhen University,College of optoelectronic engineering,Shenzhen University,Laboratory of Glasses and Ceramics,Institute of Chemistry,CNRS-Université de Rennes I,Campus de Beaulieu, Rennes Cedex,France,Nanshan Industrial Technology Research Institute,Shenzhen University,Nanshan Industrial Technology Research Institute,Shenzhen University

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    摘要:

    采用市面上商用的低熔點(diǎn)玻璃粉、稀土熒光粉與丙烯酸樹脂混合,通過絲印成膜、程序升溫與淬火的方式制備了全無機(jī)低熔點(diǎn)高穩(wěn)定性發(fā)光玻璃。采用DSC、XRD、SEM、激發(fā)發(fā)射光譜等分析手段對(duì)低熔點(diǎn)發(fā)光玻璃進(jìn)行了各種性能分析:從研究中我們發(fā)現(xiàn)稀土熒光粉的平均粒徑大約為18 μm;低熔點(diǎn)玻璃的玻璃化轉(zhuǎn)變溫度為285 ℃,添加適量稀土熒光粉后玻璃化轉(zhuǎn)變溫度升高到305 ℃左右;熒光玻璃膜中有少量孔洞,可以添加適量消泡劑或者延長(zhǎng)保溫時(shí)間來改善;熒光玻璃的晶相為玻璃相,燒結(jié)后出現(xiàn)了稀土熒光粉的特征峰。將0.6 mm厚的熒光玻璃經(jīng)過激光切割(大小為2 mm*2 mm)與疊加藍(lán)光發(fā)光芯片形成發(fā)光模組后測(cè)得熒光玻璃光效為115.5 lm/W,發(fā)光效率為76.2 %。因此,本課題的研究為高光效和高可靠性的小尺寸大電流大功率LED制備提供了有價(jià)值的途徑。

    Abstract:

    Using commercial low melting temperature glass (LMTG) powders, Ce doped Y3Al5O12 (Ce: YAG) and acrylic resin as raw materials, LMTG with Ce: YAG phosphor films for high-power white LEDs have been successfully prepared through silk-screen printing and low-temperature melt-quenching method. The LMTG with Ce: YAG phosphor thick films were studied by Differential Scanning Calorimeter, X-ray Diffraction, Photoluminescence Spectrum, and so on.The results showed that the crystal structure of Ce: YAG phosphor was formed after sintering, the glass phase was still the major phase in low melting temperature phosphor glass (LMTPG) thick films; The glass transition temperature of LMTPG films are around 305 ℃, and their glass melting temperature are around 450 ℃, both of them were significantly lower than ordinary glass. The emission peaks are a broad emission band that the center is located at 553 nm under the wavelength of 441 nm blue light excitation. the chromaticity coordinate was calculated to be (0.3794, 0.4296),the LE is 115.5 lm/W and the IE is 76.2 %. The research results indicated that the LMTPG films can be a novel promising material without any organic principle for high- power white LEDs.

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李海洋,樊博,薛白,阮雙琛,章向華,羅仲寬,李剛.稀土摻雜熒光玻璃的制備與性能研究[J].稀有金屬材料與工程,2018,47(S2):66~69.[Haiyang Li, Bo Fan, Bai Xue, Shuangchen Ruan, Xianghua Zhang, Zhongkuan Luo, Gang Li. Preparation and Properties of Low Melting Temperature Phosphor Glass Thick Films for White LEDs[J]. Rare Metal Materials and Engineering,2018,47(S2):66~69.]
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  • 收稿日期:2017-12-07
  • 最后修改日期:2017-12-07
  • 錄用日期:2018-02-01
  • 在線發(fā)布日期: 2018-11-01
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