太陽電池之抗反射層高效構形探討

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Title:	太陽電池之抗反射層高效構形探討 The high efficient topographic studies of anti-reflection of solar cell
Authors:	謝明勳
Contributors:	應用化學研究所
Keywords:	吸收率半導體高效率光亮度太陽能 solar cell solar design
Date:	2006
Issue Date:	2014-08-23 16:17:13 (UTC+8)
Abstract:	太陽能是一種使用方便、不受地形所限制的能源，而且它具有取之不竭用之不盡的特性，太陽電池即是一種能將太陽能有效轉換成電能的元件，所以太陽電池一直是先進國家的研究重點。因太陽電池的研究，大都著重在光電轉換率上，其光電轉換率的研究可分為兩個大方向。 1.為半導體材料電子能階躍遷上要如何提昇的研究，太陽電池的發展最早可以追朔至19世紀中，而砷化鎵GaAs太陽電池的研究發展則開始於西元1955年D.A.Janny〔1〕等人，當時的效率大約為5%，相較於矽太陽電池而言，效率低且發展慢。直到西元1972年為止室溫下的砷化鎵GaAs太陽電池在效率上一直未曾超越矽太陽電池。但是在西元1975年到西元1985年間，砷化鎵GaAs太陽電池在效率上有了長足的進步，這是由於PN接面品質的改善以及製程技術的進步所致。 2.為光學上光源的入射、折射、反射、穿透、吸收如何能達較高效率的研究，一般半導體材料對入射光的反射率約為0.3，也就是當光線入射到太陽電池表面時，約有30%的入射光會被反射掉，有介以此為了提昇及減少光學上的損耗，本論文利用幾何光學來描述光線在太陽電池的路經行為，即所謂的光線追跡法(Ray Tracing)。光線追跡法即是透過光線追蹤，分析光線在物件之間的行徑，並以取樣方式，得到光亮度及分佈。本論文利用此方法，設計了一種新的高效型太陽電池的構造，其架構原理為將抗反層設計為Micro Lens 其優點是;可以將光源有效聚光射入電層及在光源反射時，也可有效的反射回電極層，並比較現已量化之太陽電池的架構作比分析，依其數據顯示可顯提昇7~18%的光源吸收率。 solar emerge is a useful and unlimited power. the solar cell is a tool which can translate solar emerge to electric emerge, so it is always a research project focal point in the advanced country。In the recently research , it always focus on the optic-electric transition efficiency，that can be distinguished unto 1.How to increase electric energy level of the transmission in the semi-conductor material. The research of solar cell can be traced back to 19 century, solar cell was made by GaAs beginning from 1955 by D.A.Janny ，The efficiency is about 5 percents. only and comparing with solar cell made by Si The efficiency of GaAs could not exceed That of Si until to 1972.。In the 1975 to 1985,it The efficiency of GaAs made a lot of improvement. This is due to the progress of P-N junction qualities and the process technology. 2.How to improve the efficiency under fundamental physical behaviors In general ,the reflection of incident ray is 0.3 in the semi-conductor, it means there is only 30 percent reflection rate when the sun-light reach to the surface of solar cell. In order to improve the efficiency ,this research studies was used geometry optical to describe the rays path in the solar cell (Ray Tracing),this method is called ray tracing and ray tracing can trace the ray path in the component. It can get a distribution map of luminance by sampling. this studies was used this method to design a high-performance structure was named Micro Lens. The theorem is to design the anti-reflection as Micro lens, it can focus rays to the electric layer even the reflect rays, comparing to the produced structure of solar cell. The final result was shown the efficiency improved about 7 to 18 percents higher
Appears in Collections:	[Department of Chemistry & Graduate Institute of Applied Chemistry ] thesis

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