本文選題：多金屬氧酸鹽　切入點(diǎn)：光電導(dǎo)　出處：《東北師范大學(xué)》2017年碩士論文

【摘要】：當(dāng)今世界,一次性能源的儲量日漸減少,多種新型優(yōu)質(zhì)能源逐漸走上了歷史舞臺。其中,太陽能取自于大自然,儲量“無限”,因此,太陽能的有效開發(fā)成為研究人員關(guān)注的熱點(diǎn)之一,其中,太陽能電池可以實(shí)現(xiàn)太陽能到電能的轉(zhuǎn)換。酞菁,結(jié)構(gòu)穩(wěn)定、價(jià)格低廉、吸光范圍較寬,作為釕類化合物的替代物廣泛應(yīng)用于染料敏化太陽能電池中,但電池整體的效率仍然比較低。多酸可以做為“電子中介”捕獲和傳遞光生電子,進(jìn)而提高半導(dǎo)體材料的光伏性能;另外,AgNPs獨(dú)特的光化學(xué)特性有利于改善染料對光的吸收,良好的導(dǎo)電性能有利于加速電子轉(zhuǎn)移,提高電子注入效率。本文,首先探究了Keggin型鎢系列多酸的光電導(dǎo)性能,然后,利用多酸能夠傳導(dǎo)電子的特點(diǎn)以及銀納米粒子獨(dú)特的等離子體共振效應(yīng)和良好的導(dǎo)電性能,分別將多酸和多酸-銀納米粒子作為修飾成分,應(yīng)用于酞菁敏化太陽能電池,探究它們對電池光伏性能的促進(jìn)作用。1.制備了以對稱性酞菁為敏化劑的染料敏化太陽能電池。實(shí)驗(yàn)數(shù)據(jù)表明,相比以單獨(dú)的TiO_2為光陽極的電池,經(jīng)過多酸修飾后,電池的轉(zhuǎn)換效率提高了150%。這主要是因?yàn)槎嗨岬囊肟梢詼p少光生電子與染料/電解液的復(fù)合,促進(jìn)光生電子的轉(zhuǎn)移。并且我們通過EIS、OCVD等測試驗(yàn)證了上述解釋。2.通過原位合成技術(shù),以POM為還原劑,制備了POM-AgNPs復(fù)合物,將其作為修飾成分,摻雜到酞菁敏化太陽能電池的光陽極之中。相比于單獨(dú)使用多酸進(jìn)行修飾,經(jīng)過多酸-銀納米粒子的共同修飾后,電池的性能得以明顯改善。這主要是因?yàn)殂y納米粒子可以通過等離子體共振效應(yīng)促進(jìn)染料對光的吸收,并且其良好的導(dǎo)電性能可以加速光生電子的轉(zhuǎn)移,進(jìn)而改善電池的光伏性能。3.采用刮涂技術(shù),制備了一系列Keggin型鎢系列多酸薄膜,通過電流-電壓曲線測試和光電流測試探究其光電導(dǎo)性能。光電流測試表明,Keggin型多酸具有穩(wěn)定且可重復(fù)的光電流響應(yīng),其中,PW_(12)展示了最強(qiáng)的光電流響應(yīng),另外,利用PW_(12)光導(dǎo)器件探究了對乙醇?xì)怏w的傳感能力,這是首次使用多酸作為氣體傳感材料。
[Abstract]:In today's world, the reserves of disposable energy are dwindling, and a number of new and high-quality energy sources have gradually entered the historical stage. Among them, solar energy is taken from nature and its reserves are "unlimited," so, The effective development of solar energy has become one of the hot topics that researchers pay attention to. Among them, solar cells can realize the conversion of solar energy to electricity. Phthalocyanine is stable in structure, low in price and wide in light absorption range. As a substitute for ruthenium compounds, it is widely used in dye sensitized solar cells, but the overall efficiency of the cell is still relatively low. Polyacids can be used as "electronic intermediary" to capture and transfer photogenerated electrons. In addition, the unique photochemical properties of AgNPs are conducive to improving the absorption of light by dyes, and good conductivity is conducive to accelerating electron transfer and increasing the efficiency of electron injection. The photoconductivity of Keggin series of tungsten polyacids was studied, and then the unique plasmon resonance effect and good conductivity of silver nanoparticles were obtained by using the characteristics of polyacid to conduct electrons. Polyacid and polyacid-silver nanoparticles were used as modifiers for phthalocyanine sensitized solar cells. The photovoltaic properties of photovoltaic cells were investigated. 1. Dye sensitized solar cells with symmetrical phthalocyanine as sensitizer were prepared. The experimental data showed that compared with the cells with single TiO_2 as photoanode, the cells were modified by polyacid. The conversion efficiency of the battery has been increased by 150. This is mainly because the introduction of polyacids can reduce the combination of photogenerated electrons and dye / electrolyte. To promote photoelectron transfer. And we verified the above explanation by means of EIS-OCVD and other tests. 2. Through in situ synthesis technology, POM-AgNPs complex was prepared with POM as the reducing agent, as the modified component. Doped into the photoanode of phthalocyanine sensitized solar cell. Compared with using polyacid alone, the photoanode is modified by polyacid-silver nanoparticles. This is due to the fact that silver nanoparticles can promote the absorption of dye light through the plasmon resonance effect, and its good conductivity can accelerate the transfer of photogenerated electrons. In order to improve the photovoltaic performance of the cell. 3. A series of Keggin series of tungsten polyacid films were prepared by scraping technique. The photoconductivity was investigated by current-voltage curve test and photocurrent test. The photocurrent test showed that the Keggin polyacid had a stable and repeatable photocurrent response, among which PWS / 12 showed the strongest photocurrent response. The sensing ability of ethanol gas is investigated by using the PW12) photoconductive device, which is the first time that polyacid is used as a gas sensing material.
【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】：2017
【分類號】：TM914.4

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