本文選題：UV-LED　切入點：CdS量子點　出處：《上海師范大學》2015年碩士論文　論文類型：學位論文

【摘要】：近年來,發(fā)光二極管(LED)憑借其高效節(jié)能的優(yōu)勢逐步得到人們的青睞,隨之而來對LED用熒光材料的研究也逐漸引起極大的重視。本文旨在研究近紫外寬帶激發(fā)的LED用熒光材料,分別研究了半導體發(fā)光材料在LED方面的應用以及一種Eu2+-Mn2+離子共摻的氟磷酸鹽(Na2Mg PO4F:Eu2+,Mn2+)熒光材料,利用X-射線衍射(XRD)、場發(fā)射掃描電子顯微鏡(SEM)、高分辨透射電子顯微鏡(TEM)、紫外-可見吸收光譜(UV-Vis)、熒光光譜儀(PL)等檢測手段對樣品進行光電性能分析。在本文第二章中,運用高溫注射法成功合成了3-5納米左右的Cd S半導體準零維結構,研究了Cd S納米材料的熒光性能,并將其應用在硅基太陽能電池上,與原片相比總電池效率有將近22.6%的提升;用同樣的方法合成了微納米Zn O以及Zn O/Cd S異質結構,其熒光性能得到大幅度提高。用傳統(tǒng)的高溫固相法合成的Zn O/Cd S異質結構,解決了大規(guī)模生產(chǎn)的工藝問題,本文研究了其交錯生長的纖鋅礦晶相結構和較穩(wěn)定的熒光性能,并成功完成了稀土銪離子摻雜。在本文第三章中,我們用高溫固相法合成并研究了基質Na2Mg PO4F的晶體基本構成:是以Na2Mg F2O11為晶胞堆積成的柱狀結構,磷原子在柱列之間排列,從而形成Na2Mg PO4F晶體。通過Eu2+-Mn2+離子的摻雜濃度的調節(jié)得到了可從藍紫光到橙黃光的光色可調的熒光粉,并能適應LED的實際工作環(huán)境�？偠灾�,材料顯示了在LED上的潛在應用價值。
[Abstract]:In recent years, light emitting diode (LED) has been gradually favored by people because of its advantages of high efficiency and energy saving, and the research of fluorescent materials for LED has been paid more and more attention. The purpose of this paper is to study near-ultraviolet broadband excited fluorescent materials for LED. The applications of semiconductor luminescent materials in LED and a fluorophosphate (Na _ 2mg PO4F:Eu2 PO4F:Eu2 _ 2) fluorescent material co-doped with Eu2 -Mn2 ions were studied. The optoelectronic properties of the samples were analyzed by means of X-ray diffraction, field emission scanning electron microscopy (SEM), high resolution transmission electron microscope (TEM), UV-Vis-vis absorption spectroscopy (UV-Vis) and fluorescence spectrometer (PLL). Three to five nanometers of CDs semiconductors were successfully synthesized by high temperature injection method. The fluorescence properties of CDs nanomaterials were studied and applied to silicon based solar cells. The total cell efficiency was improved by nearly 22.6% compared with the original chip. Micro nano ZnO and Zn O / CD S heterostructures were synthesized by the same method, and their fluorescence properties were greatly improved. The conventional high temperature solid state synthesis of Zn O / CD S heterostructures solved the technological problems of large-scale production. In this paper, the crystal structure and stable fluorescence properties of wurtzite have been studied, and the doping of rare earth europium ions has been successfully completed. We have synthesized and studied the basic crystal composition of matrix Na2Mg PO4F by high temperature solid state method: it is a columnar structure with Na2Mg F _ 2O _ 11 as the unit cell, and the phosphorus atoms are arranged among the columns. Thus, Na2Mg PO4F crystal was formed. By adjusting the doping concentration of Eu2 -Mn2 ion, the luminous phosphors, which can be adjusted from blue violet light to orange and yellow light, were obtained and can adapt to the actual working environment of LED. The material shows the potential application value in LED.
【學位授予單位】：上海師范大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ422;TN312.8

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本文編號：1605349