本文選題：UV-LED　切入點(diǎn)：CdS量子點(diǎn)　出處：《上海師范大學(xué)》2015年碩士論文　論文類(lèi)型：學(xué)位論文

【摘要】：近年來(lái),發(fā)光二極管(LED)憑借其高效節(jié)能的優(yōu)勢(shì)逐步得到人們的青睞,隨之而來(lái)對(duì)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(dǎo)體發(fā)光材料在LED方面的應(yīng)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(xiàn)衍射(XRD)、場(chǎng)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(jiàn)吸收光譜(UV-Vis)、熒光光譜儀(PL)等檢測(cè)手段對(duì)樣品進(jìn)行光電性能分析。在本文第二章中,運(yùn)用高溫注射法成功合成了3-5納米左右的Cd S半導(dǎo)體準(zhǔn)零維結(jié)構(gòu),研究了Cd S納米材料的熒光性能,并將其應(yīng)用在硅基太陽(yáng)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(zhì)結(jié)構(gòu),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(zhì)結(jié)構(gòu),解決了大規(guī)模生產(chǎn)的工藝問(wèn)題,本文研究了其交錯(cuò)生長(zhǎng)的纖鋅礦晶相結(jié)構(gòu)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(zhì)Na2Mg PO4F的晶體基本構(gòu)成:是以Na2Mg F2O11為晶胞堆積成的柱狀結(jié)構(gòu),磷原子在柱列之間排列,從而形成Na2Mg PO4F晶體。通過(guò)Eu2+-Mn2+離子的摻雜濃度的調(diào)節(jié)得到了可從藍(lán)紫光到橙黃光的光色可調(diào)的熒光粉,并能適應(yīng)LED的實(shí)際工作環(huán)境�？偠灾�,材料顯示了在LED上的潛在應(yīng)用價(jià)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(xué)位授予單位】：上海師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TQ422;TN312.8

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本文編號(hào)：1605349