本文關(guān)鍵詞：多金屬氧酸鹽納米晶功能材料開(kāi)發(fā)及光伏性質(zhì)研究　出處：《東北師范大學(xué)》2015年博士論文　論文類(lèi)型：學(xué)位論文

  更多相關(guān)文章： 多金屬氧酸鹽 納米晶 功能材料 光伏效應(yīng) 太陽(yáng)能電池

【摘要】：多金屬氧酸鹽(Polyoxometalates),簡(jiǎn)稱(chēng)多酸(POMs),因組成結(jié)構(gòu)的多樣性,多功能性和穩(wěn)定性,使其在光學(xué),電學(xué)和催化等領(lǐng)域備受關(guān)注,并成為人們解決近年來(lái)日漸凸顯的能源和環(huán)境問(wèn)題的新方向之一。本文中我們主要致力于構(gòu)筑多酸基多功能納米晶光伏材料,通過(guò)依次與Zn O,表面活性劑和金屬有機(jī)骨架相結(jié)合構(gòu)筑各種多酸基納米功能材料。將成功制備的各種多酸基納米功能材料應(yīng)用于制備染料敏化太陽(yáng)能電池和量子點(diǎn)太陽(yáng)能電池中,最終獲得了電池光伏性能的顯著提升。1.通過(guò)簡(jiǎn)單的溶劑熱路線(xiàn)首次成功合成了多酸(H3PW12O40)基Zn O納米粒子并將其制備成光陽(yáng)極薄膜用于組裝染料敏化太陽(yáng)能電池(DSSCs),測(cè)試其整體光電轉(zhuǎn)換效率達(dá)2.7%,這比不含有多酸的純Zn O膜效率高出49.2%。此外我們還對(duì)其他Keggin型多酸包括W系,Mo系及其鉀鹽(K3PW12O40)的DSSCs性能進(jìn)行了研究。結(jié)果證明含W系多酸HXMW12O40(M=P,x=3;M=Si,Ge,x=4)的引入顯著提高DSSCs的性能,這是由于W系多酸增加了DSSCs的電子壽命和減小了暗電流。選擇適當(dāng)?shù)腍3PW12O40的濃度對(duì)獲取優(yōu)越的DSSCs性能十分關(guān)鍵。這為多酸復(fù)合半導(dǎo)體納米材料的光伏應(yīng)用打開(kāi)了一扇窗。2.我們首次開(kāi)發(fā)了Keggin型無(wú)機(jī)-有機(jī)雜化多酸[(CH3)4N]5[PW11O39Rh CH2COOH]?6H2O(PW11Rh-COOH)光敏劑用于組裝多酸敏化太陽(yáng)能電池(PSSCs)。通過(guò)電化學(xué)測(cè)試,固體紫外漫反射光譜,表面光電壓譜和X-射線(xiàn)光電子能譜等證實(shí)PW11Rh-COOH具有十分優(yōu)異的光伏響應(yīng),這是因?yàn)槠渚哂懈玫目梢?jiàn)光敏感性,與Ti O2相匹配的能級(jí)和更高的電荷分離效率。該工作為篩選合適帶隙和能級(jí)的多酸納米晶光伏材料提供了指導(dǎo)。3.我們成功制備了首例DODA+包裹的光敏性多酸[PW11O39Rh CH2CO2H]5-液晶納米材料。采用理論計(jì)算方法模擬了多酸陰離子周?chē)鶧ODA+的電荷分布。表面光電壓譜(SPS)測(cè)試證明復(fù)合物在光照下具有光伏效應(yīng)并展示出類(lèi)似P型半導(dǎo)體材料的特征,這為開(kāi)發(fā)基于表面活性劑包裹多酸的液晶納米材料的光電應(yīng)用鋪設(shè)了一條新路。4.在能源和材料領(lǐng)域,獲得高分散小尺寸納米晶材料對(duì)于改善材料的光電和催化性能至關(guān)重要。這里,我們發(fā)展了一種新策略用于在Ti O2表面負(fù)載高分散小尺寸~1nm的K6Co W12O40(Co W12)納米晶材料,采用金屬有機(jī)骨架MIL-101封裝合適尺寸的多酸,防止多酸聚集,隨后燒結(jié)破壞MOF骨架,將多酸均勻分散到納米Ti O2支撐膜中制備光陽(yáng)極組裝量子點(diǎn)敏化太陽(yáng)能電池(QDSCs),能夠顯著提升QDSCs性能。這一策略具有普適性,不僅為MOF材料這個(gè)龐大家族的應(yīng)用研究提供了一條新的途徑,并且有望在制備各種量子點(diǎn)尺寸金屬氧化物和其它多酸納米晶功能材料領(lǐng)域有所貢獻(xiàn)。
[Abstract]:Polyoxometalates (Polyoxometalates), referred to as multi acid (POMs), because the diversity of structure, function and stability, so that in the optical, electrical and catalytic fields has attracted much attention, and has become one of the new direction of the people to solve the energy and environmental problems become increasingly prominent in recent years. In this paper we mainly. Committed to build a multi acid based multifunctional nanocrystalline photovoltaic materials, followed by Zn and O, surface active agent and metal organic framework combined to build a variety of polyoxometalate based functional nanomaterials. Polyoxometalate based nano functional materials used in the preparation of dye-sensitized solar cell and quantum dot solar cells will be successfully prepared, finally obtained the first successful synthesis of Polyoxometalates significantly enhance.1. cell photovoltaic performance through simple solvothermal route (H3PW12O40) based Zn O nanoparticles and prepared a photoanode for dye-sensitized assembly The solar cell (DSSCs), test the overall photoelectric conversion efficiency of 2.7%, the pure Zn O film does not contain more efficiency than acid 49.2%. higher than that in addition we have on the other Keggin type polyoxometalates including W, Mo and potassium (K3PW12O40) DSSCs were studied. The results showed that W containing acid system HXMW12O40 (M=P, x=3; M=Si, Ge, x=4) was introduced to improve the performance of DSSCs, this is because the W system increases the electron lifetime of DSSCs acid and reduced the dark current. Choose a proper concentration of H3PW12O40 is the key to obtain the excellent performance of DSSCs. The photovoltaic application as much acid compound semiconductor nano materials open a window for the first time.2. we developed Keggin type inorganic organic hybrid poly [(CH3) 4N]5[PW11O39Rh CH2COOH]? 6H2O (PW11Rh-COOH) photosensitizer for assembled acid sensitized solar cell (PSSCs). The electrochemical test, UV visible diffuse reflectance spectroscopy, table Surface photovoltage spectroscopy and X- ray photoelectron spectroscopy confirmed that PW11Rh-COOH has very excellent photovoltaic response, this is because it has better visible light sensitivity, energy level matching with Ti O2 and higher charge separation efficiency. This work is selected with acid nanocrystalline photovoltaic materials and energy gap provides we successfully prepared the first guide.3. DODA+ coated photosensitive acid [PW11O39Rh CH2CO2H]5- liquid crystal nano materials were prepared. By theoretical calculation method to simulate the charge distribution around DODA+ polyoxoanions. Surface photovoltage spectroscopy (SPS) test proved that the compound has the photovoltaic effect under illumination and display characteristics similar to the P type semiconductor material this, for the development of optoelectronic applications of liquid crystal nano material coated surfactants polyoxometalate based on laying a new path of.4. in the energy and material field, high dispersion small size nanocrystalline material To improve the photoelectric and catalytic properties of essential materials. Here, we developed a new strategy for the high dispersion of small size ~1nm K6Co W12O40 Ti O2 (Co load on the surface of W12) nanocrystalline materials, the acid metal organic framework MIL-101 package size, prevent acid accumulation, then sintered to destroy MOF skeleton. The acid is uniformly dispersed into nano Ti O2 support membrane prepared in light anode assembling quantum dot sensitized solar cell (QDSCs), can significantly improve the performance of QDSCs. This method is universal, not only provides a new way for the application of MOF material in this huge family, and is expected in the field of preparation all the size of quantum dots and other multi metal oxide nanocrystalline materials contribute to acid function.

【學(xué)位授予單位】：東北師范大學(xué)
【學(xué)位級(jí)別】：博士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB34;TM914.4

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相關(guān)期刊論文 前1條

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本文編號(hào)：1384633