本文選題：稀土　切入點(diǎn)：上轉(zhuǎn)換發(fā)光　出處：《內(nèi)蒙古師范大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：稀土發(fā)光材料是指利用稀土元素獨(dú)特的電子層結(jié)構(gòu)、采用不同激發(fā)方式而使其發(fā)光的稀土功能材料。目前，稀土發(fā)光材料在照明、顯示、生物標(biāo)簽和數(shù)據(jù)儲(chǔ)存等領(lǐng)域有著廣泛的應(yīng)用前景，也正向其他新興技術(shù)領(lǐng)域擴(kuò)展。 本文的主要研究目的是合成尺寸較小形貌規(guī)則的稀土摻雜復(fù)合氟化物納米顆粒，使之應(yīng)用于熒光成像和制造激光器件。我們采用水熱法合成了形貌規(guī)則的β-Na(Y_(1.5-x-y)Na_(0.5))F_6: Yb_x~(3+), Tm_y~(3+)、LiYF_4:Yb_x~(3+), Tm_y~(3+)和β-NaGd_(0.794)Yb_(0.20)Ho_(0.001)Tm_(0.005)F_4納米顆粒，并通過980nm二極管激光器（中國科學(xué)院北京半導(dǎo)體所）激發(fā)下，采用Hitachi F-4600熒光分光光度計(jì)測量了樣品發(fā)射光譜。采用荷蘭Philips公司生產(chǎn)的Pw1830型X-射線粉末衍射儀（XRD，，其X射線波長為λ=0.15406nm）對樣品進(jìn)行了物相分析。利用JEM2010型透射電子顯微鏡（TEM，其工作電壓為200kV）和高分辨透射電子顯微鏡（HRTEM）觀察產(chǎn)物的尺寸和形貌，利用電子能譜儀（EDS）分析樣品的組成。 本論文的主要研究結(jié)果： (1)我們利用水熱合成法制備了形貌規(guī)則的六角相β-Na(Y_(1.5-x-y)Na_(0.5))F_6:Yb_x~(3+),Tm_y~(3+)納米顆粒。XRD和TEM分析結(jié)果顯示納米顆粒平均粒徑約為22nm。不同摻雜濃度的敏化劑Yb~(3+)和激活劑Tm~(3+)的室溫上轉(zhuǎn)換發(fā)射光譜分析結(jié)果表明樣品有紫外、藍(lán)色和紅色5個(gè)發(fā)射帶，其輻射躍遷分別是Tm~(3+)的~1I_6→~3F_4、~1D_2→~3H_6、~1D_2→~3F_4、~G1_4→~3H_6和~1G_4→~3F_4，敏化劑和激活劑最佳摻雜濃度分別為60%和0.6%。(2)我們利用水熱合成法制備了LiYF_4:Yb_x~(3+x),Tm_y~(3+)納米顆粒。XRD和TEM分析結(jié)果顯示納米顆粒平均粒徑約為36nm。不同摻雜濃度的敏化劑Yb~(3+)和激活劑Tm~(3+)的室溫上轉(zhuǎn)換發(fā)射光譜分析結(jié)果表明樣品有紫外、藍(lán)色和紅色5個(gè)發(fā)射帶，其輻射躍遷分別是Tm~(3+)的~1I_6→~3F_4、~1D_2→~3H_6、~1D_2→~3F_4、~1G_4→~3H_6和~1G_4→~3F_4，敏化劑和激活劑最佳摻雜濃度分別為60%和0.6%。此結(jié)果與合成β-Na(Y_(1.5-x-y)Na_(0.5)F_6:Yb_x~(3+),Tm_y~(3+)納米顆粒的結(jié)果一致，表明第一族元素Na和Li作為基質(zhì)復(fù)合氟化物的稀土Yb~(3+)，Tm~(3+)摻雜納米材料的發(fā)光性質(zhì)較相似。 (3)我們利用簡單的水熱法合成了β-NaGd_(0.794)Yb_(0.20)Ho_(0.001)Tm_(0.005)F_4納米顆粒。XRD分析結(jié)果表明樣品為六角物相。同時(shí)我們觀察到了YbF3的兩個(gè)X-射線衍射峰。TEM分析結(jié)果說明，樣品具有橢球和六角兩種形貌，其平均邊長為23nm。室溫上轉(zhuǎn)換發(fā)射光譜分析結(jié)果告訴我們，樣品是由Tm~(3+)離子的藍(lán)色發(fā)光和Ho~(3+)離子的綠色、紅色發(fā)光組成白色上轉(zhuǎn)換發(fā)光。根據(jù)色品分析結(jié)果得知，白色光的色品坐標(biāo)分別為CIE-X=0.2717和CIE-Y=0.2673。
[Abstract]:Rare earth luminescent material is a kind of rare earth functional material which uses the unique electronic layer structure of rare earth elements and uses different excitation ways to make it luminous. At present, rare earth luminescent materials are illuminated and displayed. Biolabelling and data storage have a wide range of applications and are expanding to other emerging technologies. The main purpose of this paper is to synthesize rare earth doped composite fluoride nanoparticles with small size and regular morphology. For use in fluorescent imaging and laser devices, we have hydrothermal synthesis of regular 尾 -NaGdtir 1.5-x-yn NaS-1. 5 / F6: Yb_x~(3: Yb_x~(3, Tm_y~(3 / LiYF4: YbxS, Tm_y~(3) and 尾 -NaGd0.794Ybb / 0.20HoGd0.20 Hob / 0.20 / 0.20 / 0. 001T / T / T / P / P / F4 nanoparticles, excited by a 980nm diode laser (Beijing Semiconductor Institute of the Chinese Academy of Sciences), and by means of a 980nm diode laser (Beijing Semiconductor Institute of the Chinese Academy of Sciences). The emission spectrum of the sample was measured by Hitachi F-4600 fluorescence spectrophotometer. The phase analysis of the sample was carried out by using the Pw1830 X-ray powder diffractometer made by Philips Company of the Netherlands, the X-ray wavelength of which was 位 0.15406nm. the JEM2010 transmission electron display was used to analyze the phase of the sample. The size and morphology of the products were observed by micromirror Tem with a working voltage of 200kV) and HRTEM with high resolution transmission electron microscopy (HRTEM). The composition of the sample was analyzed by electron energy spectrometer (EDS). The main results of this thesis are as follows:. (1) We have prepared hexagonal phase 尾 -NaANGYANGYX (1.5-x-YS) 0.5D, F6: YbxX ~ (3) T _ myY _ (3) by hydrothermal synthesis method. The results of TEM and XRD analysis show that the average particle size is about 22 nm. The sensitizer Yb~(3 with different doping concentration and the activator Tm~(3) have been prepared at room temperature. The results of the analysis are as follows: (1) the average particle size of the hexagonal phase is about 22 nm, and that of the activator Tm~(3) is different from that of the sensitizer (Yb~(3) with different doping concentration. The results of conversion emission spectrum analysis showed that the samples had UV, Blue and red emission bands with radiation transitions of Tm~(3). 鈫

本文編號：1645491