本文選題：熒光硅納米顆粒 + 熒光可調(diào)�。� 參考：《蘇州大學(xué)》2015年碩士論文

【摘要】：近年來,小尺寸(2.5-5 nm)熒光硅納米顆粒因其獨(dú)特的光學(xué)性質(zhì)(如,強(qiáng)且穩(wěn)定的熒光)和良好的生物相容性,被廣泛研究并用于光學(xué)應(yīng)用。本文中,利用熒光硅納米顆粒作為新型光轉(zhuǎn)換器,我們介紹了一種基于小尺寸(~3.7 nm)熒光硅納米顆粒的光轉(zhuǎn)換器用于構(gòu)建新型白光發(fā)光二極管(light-emitting diodes,LEDs)。我們優(yōu)化了之前報(bào)道的微波輔助合成熒光硅納米顆粒的方法,通過調(diào)控反應(yīng)前體溶液的p H值(從堿性調(diào)整到酸性),制備得到光色可調(diào)的熒光硅納米顆粒(從藍(lán)光到黃綠光),最大發(fā)射波長(zhǎng)從454 nm調(diào)整到545 nm。特別地,在前體溶液p H值為4條件下制備得到的熒光硅納米顆粒呈現(xiàn)黃綠色熒光,且發(fā)射峰較寬,適合于白光光譜的構(gòu)建。進(jìn)一步地,我們將其作為光轉(zhuǎn)換器并用于構(gòu)建白光LED。制備得到的LED的流明效率為13 lm/W,CIE(Commission Internationale de l'Eclairage)指數(shù)為(0.3041,0.3129),CRI(Color Rendering Index)指數(shù)為82,色溫指數(shù)為7982 K。
[Abstract]:In recent years, fluorescent silicon nanoparticles with small size (2.5-5 nm) have been widely studied and used in optical applications because of their unique optical properties (such as strong and stable fluorescence) and good biocompatibility. In this paper, using fluorescent silicon nanoparticles as a new type of optical converter, we introduce an optical converter based on small size (3.7 nm) fluorescent silicon nanoparticles to construct a new type of white light-emitting diode light-emitting diodes (LEDs). We optimized the microwave assisted synthesis of fluorescent silicon nanoparticles previously reported. By adjusting the pH value of the reaction precursor solution (from alkaline to acidic), the photochromatic and tunable fluorescent silicon nanoparticles (from blue light to yellowish green light) were prepared. The maximum emission wavelength was adjusted from 454 nm to 545 nm. In particular, when the pH value of precursor solution is 4, the fluorescent silicon nanoparticles exhibit yellowish green fluorescence, and the emission peak is wide, which is suitable for the construction of white light spectrum. Further, we use it as an optical converter and to build a white LED. The lumen efficiency of the prepared LED is 13lm / W ~ (-1) Internationale de lcloirage) index is 0.3041 ~ 0.3129C ~ (3 +) Rendering index is 82, and the color temperature index is 7982 K.
【學(xué)位授予單位】：蘇州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN312.8;TB383.1

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本文編號(hào)：1908865