标题: | 利用AMPS-1D分析及优化矽基薄膜太阳能电池 Analysis and Optimization of Si-based Thin Film Solar Cells Using AMPS-1D |
作者: | 黄正宇 Huang, Jeng-Yu 余沛慈 Yu, Pei-Chen 光电工程学系 |
关键字: | 薄膜太阳能电池;非晶矽;AMPS-1D;Thin film solar cells;a-Si;AMPS-1D |
公开日期: | 2010 |
摘要: | 矽基薄膜太阳能电池的结构比起矽晶圆太阳能电池要来的复杂,因此在制程上非常的耗时,如果要优化它们会是一个庞大的工程。我们利用AMPS-1D模拟软体来建立矽基薄膜太阳能电池模型,分析与优化它们并试图与制程结合在一起,藉由此种方式可以有效的优先找出改良元件效率的因素或者是避免在制程上不需要的测试,已减少实际实验所需的时间。 本篇论文的第一部分是在介绍AMPS-1D模拟软体如何运作及参数的认识和模型的建立,以及透过不同量测方式来建立模型的完整性。在第二部份的分析及讨论会先分别利用建立的模型去计算非晶矽、非晶矽锗、微晶矽薄膜和双接面太阳能电池的转换效率,接着在模型上变动一些制程上可以去改变的元件参数如掺杂浓度、厚度、能隙等等,去看其对转换效率的影响如何,并去解释这些影响效率的因素,从这些数值计算和讨论结果可以找到优化方法。 在非晶矽上,我们发现P型层和I型层以及TCO功函数对效率的改善有很大帮助;而非晶矽合金在适当调变能隙下或是利用缓冲层有助于元件优化;微晶矽部份,我们分成薄膜和元件结构讨论,找出薄膜最适合的掺杂和微晶矽的优化结果,当我们优化完单一接面的的矽基薄膜太阳能电池后,我们利用这些优化完毕的子电池模型来堆叠制作高效率双接面的矽基薄膜太阳能电池,分别是非微晶堆叠和非晶矽堆叠非晶矽锗的薄膜太阳能电池,我们的高效率双接面太阳能电池模型效率在非微晶堆叠可达9.34%;在非晶矽堆叠非晶矽锗则具有10.15%的效率。 Since the structures of silicon-based thin film solar cells are more complex than Monocrystalline-silicon solar cells, it is time-consuming in processing. For this reason, to optimize Si-based thin film solar cells in processing is a lot of work. In order to solve this problem, we are use the AMPS-1D simulation program to set up models of Si-based thin film solar cells and combine with the process, moreover, we are analysis and optimize these models in simulation results. It will save us much time on experiments. In the first session of my thesis, the mathematical modeling and solution techniques of AMPS-1D had been introduced. Each parameter for setting up model was mentioned and I will list and introduce all of parameters to different material thin film solar cells’ models. In addition, measuring methods used to set up more complete models were also introduced. In the next session, first theoretically optimize the amorphous (a-Si:H) and the microcrystalline (μc-Si:H) devices characteristics, and then perform studies for micromorph and a-Si:H/a-SiGe:H tandem solar cells. In optimization, we modify various fabrication parameters with numerical calculation for each sub cell models and explain how they affect efficiency. For a-Si:H, AMPS-1D show that the TCO work function has a strongly influence on the open-circuit voltage. Moreover, the power conversion efficiency is optimized for the absorber’s layer thickness and mobility gap, also for the p-layer’s doping concentration. Finally, we are present a-Si alloyed model that has better efficiency, too. The studies next indicate a critical doping concentration of μc-Si:H films which limited the barrier height of a grain boundary (GB). Furthermore show the calculation results in different crystalline volume fraction (XC) and fabrication parameters such like absorber’s layer thickness and quality. These are enough to improve μc-Si:H solar cell efficiency . After optimizing sub cell each other, we combine the individual junctions and construct high efficiency tandem solar cells. Our models are present high efficiency 9.34% in a micromorph cell, and high efficiency of 10.15% in a-Si/a-SiGe tandem cell. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT079724535 http://hdl.handle.net/11536/45119 |
显示于类别: | Thesis |
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