發(fā)布時間：2018-05-04 10:51

  本文選題：長余輝發(fā)光材料 + 摻雜　； 參考：《閩南師范大學》2017年碩士論文

【摘要】：長余輝發(fā)光材料是一種蓄光節(jié)能的綠色環(huán)保材料,在標識物、日用工藝品等廣泛應用。發(fā)光性能優(yōu)異、化學性能穩(wěn)定、綠色環(huán)保、制造成本低成為衡量長于輝發(fā)光材料的重要指標。磷酸鹽長余輝發(fā)光材料具有綠色環(huán)保、化學性能穩(wěn)定、且易制作等優(yōu)點。本研究首次報道新型藍綠色長余輝發(fā)光材料ZrP_2O_7:Mn~(2+)的制備。采用高溫固相合成法制備以ZrP_2O_7為主體材料,以Zr4+作為發(fā)光中心制備藍綠色長余輝發(fā)光材料。通過摻雜低價態(tài)的金屬離子以及稀土敏化離子以提高材料的發(fā)光性能。對材料進行XRD測試并對其物相進行分析,所制備的各種摻雜材料ZrP_2O_7:Mn~(2+),M均歸屬于標號為PDF:49-1079的標準圖譜,摻雜未造成物相的改變但引起晶胞的微小收縮并對材料的結構性能有所改善;對材料進行激發(fā)發(fā)射光譜測試,并對激發(fā)峰及發(fā)射峰所對應的微觀能級躍遷進行歸屬,其中位于412 nm、400 nm、382 nm、369 nm及332 nm及附近的激發(fā)峰分別歸屬于Mn~(2+)的6A1→4T1(4G)、6A1→4T2(4G)、6A1→4E、4A1(4G)、6A1→4T2(4D)及6A1→4E(4D)能級躍遷,493 nm附近的發(fā)射峰來自于Zr4+,屬于藍光范疇,在545 nm處有一個很弱的發(fā)射峰,屬于綠光范圍,歸屬于Mn~(2+)離子4T1g→6A1g的能級躍遷,與所觀察的藍綠光一致;對材料的余輝衰減性能進行測試,材料的目測余輝時間可以達到3小時以上;對材料進行熱釋光譜的測試,并計算其能級陷阱,陷阱深度介于0.2-0.5 eV,深度較合適。通過對材料進行低價離子(Na+、K+、Sr~(2+))摻雜,替代Zr4+以制造材料的內部氧空位缺陷,增加氧缺陷濃度。氧缺陷濃度的增加有利于材料發(fā)光性能的改善;此外,摻雜離子的引入也有利于制造深度更加合適的能級陷阱,從而改善材料的發(fā)光性能;引入稀土離子(Dy3+、Pr3+、Sm3+)作為敏化離子,利用敏化離子的發(fā)射峰能級與發(fā)光中心離子能級的交錯以達到把敏化離子吸收的光能轉移給發(fā)光中心從而改善材料的發(fā)光性能。材料被光照射后其電子將由基態(tài)躍遷到激發(fā)態(tài)并在材料內部中產生電子空穴對。處于激發(fā)態(tài)的電子會弛豫到比較低的能級狀態(tài),其中大部分直接返回到基態(tài)發(fā)光,而少部分會被陷阱所捕獲并在熱擾動下被釋放出來躍遷回基態(tài)發(fā)出光而起到余輝作用。此外因光激發(fā)而產生的電子空穴對會在晶格中遷移并在遷移過程中發(fā)生相遇而覆滅發(fā)光,電子空穴對的壽命影響材料的余輝性能。
[Abstract]:Long afterglow luminescent material is a kind of green environmental protection material, which is widely used in marking, daily handicraft and so on. Luminescence performance, chemical stability, green environmental protection, low manufacturing cost have become an important index to measure the length of luminescent materials. Phosphates long afterglow luminescent materials have the advantages of green environment, stable chemical properties and easy to manufacture. The preparation of a novel blue-green long afterglow phosphor (ZrP_2O_7:Mn~(2) is reported for the first time. The blue-green long afterglow phosphors were prepared by high temperature solid state synthesis with ZrP_2O_7 as the main material and Zr4 as the luminous center. The luminescence properties of the materials were improved by doping metal ions and rare earth sensitized ions. The materials were tested by XRD and their phases were analyzed. All kinds of doped materials, ZrP_2O_7:Mn~(2 + M, were assigned to the standard spectrum of PDF:49-1079. Doping did not change the phase, but caused the tiny shrinkage of the unit cell and improved the structure and properties of the material. The excitation emission spectrum of the material was measured, and the microscopic energy level transition corresponding to the excitation peak and the emission peak was assigned. The emission peaks near 369nm, 332nm and 332nm of 412Nm ~ (1) ~ (4nm) ~ (3 ~ (2) ~ (3) ~ (2) and ~ (3) ~ (32) nm) belong to Zr4 and belong to the category of blue light, respectively, and the emission peaks of 4A1 ~ (4A ~ (1) ~ (4A ~ (1) ~ (4A ~ (1) ~ (4T _ (2) ~ (4D) and 6A1 _ (4E) ~ (4D) are from Zr4 and belong to the category of blue light, and the emission peaks near the excitation peaks are located at 412nm and 332nm, respectively. There is a very weak emission peak at 545nm, which belongs to the green light range and belongs to the energy level transition of Mn~(2) ion 4T1g 6A1g, which is consistent with the observed blue-green light, and the decay performance of the afterglow of the material is measured. The visual luminescence time of the material can reach more than 3 hours, and the pyrorelease spectrum of the material is measured, and its energy level trap is calculated. The depth of the trap is between 0.2-0.5 EV, and the depth is more suitable. In order to make the internal oxygen vacancy defects and increase the concentration of oxygen defects, the Zr4 was replaced by the doping of Na ~ (2 +) -K ~ (2 +) ~ (2 +) ~ (2 +) in the materials. The increase of oxygen defect concentration is beneficial to the improvement of the luminescence performance of the material, in addition, the introduction of doping ions is also beneficial to the fabrication of energy level traps with more suitable depth, thus improving the luminescent properties of the materials. Rare earth ion (Dy3 + Pr3 + Sm 3) was introduced as sensitized ion. The luminescent properties of the sensitized ion were improved by the interleaving of the emission peak energy level of the sensitized ion and the ion level of the luminous center to transfer the light energy absorbed by the sensitized ion to the luminescent center. When the material is irradiated by light, the electrons will transition from ground state to excited state and the electron hole pair will be generated in the material. The electrons in the excited state will relax to the lower energy level state, most of them will return directly to the ground state to emit light, while a few will be trapped by the trap and released under the thermal disturbance to transfer back to the ground state to emit light, which will play an afterglow effect. In addition, the electron hole pair generated by light excitation will migrate in the lattice and meet during the migration process, and the lifetime of the electron hole pair will affect the afterglow properties of the material.
【學位授予單位】：閩南師范大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O482.31

【參考文獻】

相關期刊論文 前10條

1 胡正發(fā);孟濤;張偉;崔躍鵬;羅莉;王銀海;;Dy~(3+)離子摻雜的全色熒光粉Ca_9La(PO_4)_7的制備及發(fā)光特性[J];物理化學學報;2013年10期

2 新梅;胡禮中;;Luminescence properties of ZnS:Cu, Eu semiconductor nanocrystals synthesized by a hydrothermal process[J];Chinese Physics B;2013年08期

3 劉自然;鐘瑞霞;;γ-Zn_3(PO_4)_2:Mn~(2+),Ga~(3+)的發(fā)光性質及能量傳遞[J];中國稀土學報;2013年02期

4 邱濤;季振國;孔哲;李紅霞;張爾攀;;長余輝夜光材料Sr_4Al_(14)O_(25):(Eu,Dy)的制備及性能優(yōu)化(英文)[J];無機材料學報;2012年12期

5 李向果;梁振華;彭桂花;;燃燒合成納米Y_2O_2S:Eu~(3+),Mg~(2+),Ti~(4+)紅色長余輝發(fā)光材料[J];韶關學院學報;2012年08期

6 王志軍;李妍;王穎;李盼來;郭慶林;楊志平;;Eu~(2+)在KNaCa_2(PO_4)_2中的發(fā)光及晶體學格位[J];無機材料學報;2011年07期

7 陳小博;李毅東;艾鵬飛;譚寧會;劉應亮;;沉淀法合成藍色長余輝發(fā)光材料Sr_2MgSi_2O_7∶Eu~(2+),Dy~(3+)[J];無機化學學報;2010年01期

8 周亮;周永慧;鄭佑軒;游效曾;;β-Zn_3(PO_4)_2∶Mn~(2+),B~(3+)長余輝發(fā)光材料的性能[J];發(fā)光學報;2008年06期

9 姜偉棣;;長余輝發(fā)光材料的研究進展[J];材料導報;2007年08期

10 洪樟連;張朋越;黃秋平;樊先平;王民權;;Y_2O_2S:0．03Eu,0．03Ti的長余輝特性及Ti向Eu~(3+)的余輝傳能機制[J];無機材料學報;2006年02期

，

本文編號：1842749