發(fā)布時間：2018-02-03 06:07

  本文關(guān)鍵詞： 金銀合金三角盒納米顆粒 局域表面等離激元 有機太陽能電池 二氧化硅包覆　出處：《太原理工大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：與無機太陽能電池相比,有機太陽能電池有很多顯而易見的優(yōu)點:成本低廉,原材料來源豐富,適合大面積生產(chǎn),良好的柔韌性等。但因為其自身原因仍然深受低能量轉(zhuǎn)化效率的阻礙,無法實現(xiàn)商業(yè)化生產(chǎn)。在有機太陽能電池中摻入金屬納米顆粒是一種有效提高其能量轉(zhuǎn)化效率的方法。通過激發(fā)金屬納米顆粒的局域表面等離激元效應(yīng),其場增強和光散射效應(yīng)會在活性層中大幅度提高對光的吸收能力。而且最新的研究也表明金屬納米顆粒還可以提高有機太陽能電池的電學(xué)性能。本論文具體工作如下:(1)在本文中,我們利用種子溶液生長法和置換反應(yīng)成功合成了金銀合金三角盒納米顆粒。在基于PTB7:PC70BM正置結(jié)構(gòu)的有機太陽能電池的緩沖層和活性層界面摻入金銀合金三角盒納米顆粒,通過優(yōu)化其濃度,我們將器件的能量轉(zhuǎn)化效率從6.58%提高到了7.11%,短路電流密度從13.36mA/cm2提高到了15.01mA/cm2,相比標(biāo)準(zhǔn)器件各自提高了8.1%和12.4%。通過我們系統(tǒng)的研究,我們發(fā)現(xiàn)金銀合金三角盒納米顆粒的引入不僅僅使得活性層的光吸收在一個寬譜范圍內(nèi)有提高,而且還使得激子在PTB7和PC70BM界面處的分離率提高。雖然顆粒的摻入也使得器件的漏電流升高,但其帶來的載流子遷移率的提高效果更勝一籌,這使得最終器件表現(xiàn)出的填充因子的下降顯得微不足道。本論文的工作將有助于高性能,低成本的有機太陽能電池的發(fā)展。(2)為了進(jìn)一步提高金銀合金三角盒納米顆粒的分散性和穩(wěn)定性,我們利用硅酸四乙酯(TEOS)在堿性條件下水解的原理成功在金銀合金三角盒納米顆粒外面包覆了一層二氧化硅的殼,起到阻止內(nèi)部金屬顆粒被氧化和分散顆粒的作用。通過紫外可見光吸收光譜和TEM圖證明了通過這種方法確確實實將金銀合金三角盒納米顆粒包覆成功。包覆成功后的金銀合金三角盒納米顆�？梢匀苡诟嗳軇�,為金銀合金三角盒納米顆粒將來的應(yīng)用提供了廣泛的空間。最后,我們對本論文的工作做了總結(jié)和展望,提出了未來的研究方向。
[Abstract]:Compared with inorganic solar cells, organic solar cells have many obvious advantages: low cost, abundant raw materials, suitable for large-scale production. Good flexibility and so on. But because of its own reasons are still hampered by low energy conversion efficiency. The incorporation of metal nanoparticles in organic solar cells is an effective way to improve the efficiency of energy conversion. The field enhancement and light scattering effect will greatly improve the absorption of light in the active layer. The latest research also shows that metal nanoparticles can also improve the electrical properties of organic solar cells. As follows:. (. 1) in this paper. We successfully synthesized gold and silver alloy triangular box nanoparticles by seed solution growth and displacement reaction. The interface of buffer layer and active layer of PC70BM positive structure organic solar cell is doped with gold and silver alloy triangular box nanoparticles. By optimizing its concentration, we increase the energy conversion efficiency from 6.58% to 7.11 and the short-circuit current density from 13.36 Ma / cm ~ 2 to 15.01 Ma / cm ~ 2. Compared with the standard devices, the improvement of 8.1% and 12. 4 respectively. Through our system research. We find that the introduction of gold and silver alloy triangular box nanoparticles not only increases the light absorption of the active layer in a wide spectrum range. It also increases the separation rate of exciton at the interface between PTB7 and PC70BM. Although the doping of particles also increases the leakage current of the device, the effect of the increase of carrier mobility is better. This makes the decrease of filling factor of the final device appear insignificant. The work of this paper will contribute to the high performance. Development of low-cost organic solar cells) in order to further improve the dispersion and stability of gold and silver alloy triangular box nanoparticles. Using the principle of tetraethyl silicate (TEOS) hydrolysis in alkaline condition, we successfully coated a layer of silica shell on the surface of gold and silver alloy triangular box nanoparticles. It can prevent the inner metal particles from being oxidized and dispersed. The ultraviolet and visible absorption spectra and TEM diagram prove that the gold and silver alloy triangular box nanoparticles are successfully coated by this method. The successful gold and silver alloy triangular box nanoparticles can be dissolved in more solvents. It provides a wide range of space for the application of gold and silver alloy triangular box nanoparticles in the future. Finally, we summarize and prospect the work of this paper, and propose the future research direction.
【學(xué)位授予單位】：太原理工大學(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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本文編號：1486644