本文選題：單晶硅　切入點(diǎn)：各向異性腐蝕　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：光伏發(fā)電是太陽(yáng)能利用的重要組成部分,它是一種用之不竭的、可再生的綠色清潔新能源。對(duì)于光伏產(chǎn)業(yè)而言,永恒不變追求的是低的制造成本和高的轉(zhuǎn)換效率。當(dāng)前,對(duì)于單晶硅太陽(yáng)能電池片,影響太陽(yáng)能電池光電轉(zhuǎn)換效率的重要因素之一是其表面的太陽(yáng)光反射率。在硅片表面織構(gòu)化可以顯著降低太陽(yáng)能電池的表面反射率�，F(xiàn)在,太陽(yáng)能電池單晶硅片的制絨已經(jīng)是一個(gè)相對(duì)完善的工藝,在工業(yè)化大生產(chǎn)制備單晶硅絨面時(shí)最常使用的是堿化學(xué)腐蝕法。在制造單晶硅太陽(yáng)能電池的過(guò)程中,通常利用堿溶液對(duì)晶體硅(100)面和(111)面不同晶向的各向異性腐蝕特點(diǎn),在單晶硅表面腐蝕制絨出類似于“金字塔”形狀的絨面織構(gòu),使得入射光線可以在硅表面多次反射,從而提高硅表面對(duì)入射光線的吸收率,使單晶硅太陽(yáng)能電池的轉(zhuǎn)換效率更高。本文研究之一是在Visua1 C++環(huán)境下,根據(jù)連續(xù)CA算法(原子方法)抽象了硅各向異性腐蝕模型,利用OpenGL技術(shù)(即“開放的圖形程序接口”技術(shù)),建立了硅各向異性腐蝕的三維動(dòng)態(tài)模擬系統(tǒng),從微觀角度模擬硅各向異性腐蝕的動(dòng)態(tài)過(guò)程,并據(jù)此模擬系統(tǒng),配合實(shí)驗(yàn)加以驗(yàn)證,取得了較好的效果。本文還研究了在較短時(shí)間內(nèi),NaOH(氫氧化鈉)+IPA(異丙醇)+制絨添加劑體系腐蝕制絨時(shí)的溶液組分、溫度、時(shí)間和攪拌等因素對(duì)絨面織構(gòu)的影響。發(fā)現(xiàn)金字塔絨面布滿整個(gè)硅表面,且大小在3~5μm時(shí),此時(shí)制作的太陽(yáng)能電池光電轉(zhuǎn)換效率最高。通過(guò)試驗(yàn)組合不同的制絨工藝參數(shù),最終得到了適合天通公司工業(yè)化大生產(chǎn)需要,且成本和效率最佳的工藝:在含1.5wt%NaOH、6vol%IPA和0.4vol%制絨添加劑的溶液中,80℃恒溫,對(duì)單晶硅片處理18min,即可制備出需要的絨面。實(shí)驗(yàn)還發(fā)現(xiàn)攪拌溶液有助于提高腐蝕反應(yīng)速率,制絨前在新配溶液中加入0.25wt%Na2SiO3(硅酸鈉),絨面效果更佳。
[Abstract]:Photovoltaic power generation is an important part of solar energy utilization, it is an inexhaustible, renewable green clean new energy. For the photovoltaic industry, the eternal pursuit is low manufacturing costs and high conversion efficiency. For monocrystalline silicon solar cells, one of the important factors affecting the photovoltaic conversion efficiency of solar cells is the solar reflectivity on the surface. Texture on the surface of silicon wafers can significantly reduce the surface reflectivity of solar cells. The manufacture of single crystal silicon wafers for solar cells is a relatively perfect process. The alkali chemical etching method is the most commonly used in the industrial production of monocrystalline silicon flannels. By using the anisotropic corrosion characteristics of alkali solution on the crystal Si (100) and Si (111) faces in different directions, textures similar to the "pyramidal" shape are produced by etching the surface of the single crystal silicon, so that the incident light can be repeatedly reflected on the silicon surface. Thus, the absorption rate of incident light on silicon surface is improved, and the conversion efficiency of single crystal silicon solar cell is improved. One of the studies in this paper is to abstract the anisotropic corrosion model of silicon based on continuous CA algorithm (atomic method) in Visua1 C environment. In this paper, a three-dimensional dynamic simulation system of silicon anisotropic corrosion is established by using OpenGL technology (that is, "open graphic program interface"). The dynamic process of silicon anisotropic corrosion is simulated from a microscopic point of view, and the simulation system is based on the system. This paper also studies the solution composition and temperature of NaOH (sodium hydroxide) IPA (isopropanol) additive system when corroding the cashmere making system in a short time. The effect of time and agitation on the texture of the suede surface. It was found that the pyramidal flannelette covered the whole silicon surface, and when the size was 3 渭 m, the photovoltaic conversion efficiency of the solar cell was the highest. Finally, a process suitable for the large industrial production needs of Tiantong Company with the best cost and efficiency was obtained: 80 鈩，

本文編號(hào)：1574953