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  本文選題：二氧化鈦納米線陣列　切入點：染料敏化　出處：《東北師范大學(xué)》2014年碩士論文

【摘要】：一維單晶TiO2納米線陣列由于其優(yōu)異的光生電荷分離與輸運特性而受到光電化學(xué)研究領(lǐng)域的廣泛關(guān)注。特別是TiO2單晶納米線陣列的可控制備與光電轉(zhuǎn)換應(yīng)用是近年來國內(nèi)外研究的熱點。本文分別采用水熱和溶劑熱方法研究了一維TiO2納米線陣列生長的影響因素，獲得了制備高比表面積TiO2納米線陣列的制備方法，并得到了光電轉(zhuǎn)換效率高達(dá)5.46%的染料敏化太陽能電池器件。具體研究內(nèi)容如下： 采用水熱合成方法制備了二氧化鈦納米線陣列，研究了生長基底、反應(yīng)時間、鹽酸含量以及氯化鈉、鹽酸多巴胺、PVP、PEG等添加劑對水熱體系中二氧化鈦納米線陣列生長的影響規(guī)律。研究結(jié)果表明，反應(yīng)體系中鹽酸及氯化鈉的增加明顯抑制了二氧化鈦納米線徑向的生長。 采用溶劑熱合成方法制備二氧化鈦納米線陣列，研究了反應(yīng)前驅(qū)物（鈦源、DEG、鹽酸）濃度、反應(yīng)時間、反應(yīng)溫度等對溶劑熱體系中二氧化鈦納米線陣列生長的影響規(guī)律。研究結(jié)果表明，溶劑熱體系有利于大長徑比二氧化鈦納米線陣列的生長，在短時間可以制備出高比表面積、高密度取向生長納米線陣列。 以2小時溶劑熱反應(yīng)制備的二氧化鈦納米線陣列為光陽極，組裝染料敏化太陽能電池器件。研究了鈦酸納米片（TN）晶種層、熱退火及紫外臭氧處理對電池器件性能的影響。結(jié)果表明，預(yù)先沉積的TN層不僅為TiO2納米線的生長提供成核位點，同時有效地阻擋了電解質(zhì)溶液與FTO表面的電荷復(fù)合，其所構(gòu)建的電池器件的光電轉(zhuǎn)換效率達(dá)到了4.36%，比未沉積TN層的納米線陣列光陽極電池器件提高6%。進一步的UV/O3處理，有效地去除了TiO2納米線陣列表面的碳?xì)堄�，，使其所�?gòu)建電池的光電轉(zhuǎn)換效率進一步提高到5.46%，顯示出優(yōu)異的太陽能光電轉(zhuǎn)換特性。
[Abstract]:One-dimensional single crystal TiO2 nanowire arrays have attracted wide attention in the field of photochemistry for their excellent photocharge separation and transport properties. In particular, the controllable fabrication and photoelectric conversion of TiO2 single crystal nanowire arrays have been widely used in recent years. In this paper, the factors affecting the growth of one-dimensional TiO2 nanowire arrays were studied by hydrothermal and solvothermal methods. The preparation method of TiO2 nanowire array with high specific surface area was obtained, and the photoelectricity conversion efficiency of the dye sensitized solar cell device was up to 5.46%. The detailed research contents are as follows:. Titanium dioxide nanowire arrays were prepared by hydrothermal synthesis. The growth substrate, reaction time, hydrochloric acid content and sodium chloride were studied. The effect of additives such as dopamine hydrochloride and PVP- PEG on the growth of titanium dioxide nanowires array in hydrothermal system was studied. The results showed that the increase of hydrochloric acid and sodium chloride obviously inhibited the radial growth of titanium dioxide nanowires. TIO _ 2 nanowire arrays were prepared by solvothermal synthesis. The concentration of the precursor (titanium source DEG, hydrochloric acid) and the reaction time were studied. The effect of reaction temperature on the growth of TIO _ 2 nanowire arrays in solvothermal system. The results show that solvothermal system is favorable to the growth of TIO _ 2 nanowire arrays with large aspect ratio and high specific surface area can be prepared in a short time. Nanowire arrays were grown with high density orientation. The dye sensitized solar cell devices were assembled with titanium dioxide nanowire arrays prepared by 2 hours solvothermal reaction as photoanode. The seed layer of TNO _ 3 nanocrystalline titanate was studied. The effects of thermal annealing and ultraviolet ozone treatment on the performance of TiO2 devices show that the pre-deposited TN layer not only provides nucleation sites for the growth of TiO2 nanowires, but also effectively blocks the charge recombination between electrolyte solution and FTO surface. The photoelectric conversion efficiency of the fabricated battery device is 4.36, which is 6 times higher than that of the undeposited TN layer nanowire array photoanode battery device. Further UV/O3 treatment can effectively remove the carbon residue on the surface of TiO2 nanowire array. The photovoltaic conversion efficiency of the battery is further improved to 5.46, showing excellent photovoltaic conversion characteristics.
【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB383.1;TM914.4

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