太阳能电池高温应力失效机理及表征方法研究

发布时间：2018-03-30 09:38

本文选题：太阳能电池　切入点：失效机理　出处：《西安电子科技大学》2014年硕士论文

【摘要】：太阳能凭借其取之不尽、用之不竭、清洁无污染等优点而被广泛利用,对太阳能的利用最成功的方式就是太阳能光伏发电,太阳能电池就是一种把光能转换成电能的半导体器件。当电池工作在高温环境中时,电池材料中的潜在缺陷、生产制造过程中引入的杂质和缺陷会被激活,严重影响电池的质量和可靠性。因此,急需找到一种高效、灵敏的可靠性表征方法,分析表征电池在高温应力条件下的失效模式与失效机理。本文综述了太阳能电池高温应力条件下的失效模式和失效机理,归纳总结了噪声的基本知识和太阳能电池中噪声的来源,在此基础之上,制定了太阳能电池高温老化加速实验,设计了测试方案和分析方案,包括偏置电路的设计,噪声测试平台的搭建,表征参量的提取和实验规范流程的设计等。依照测试方案,分别测试了电池实验前后的电学参量和噪声参量,对比分析了电学参量和噪声参量表征方法,实验结果说明噪声参量表征方法能够如实有效地反映出电池性能的退化情况,并且噪声参量表征方法较电学参量表征方法的灵敏度更高。进一步,结合半导体器件中噪声的产生机理与太阳能电池失效物理,从缺陷与载流子输运关系的角度,分析了噪声幅值变化的原因,解释了太阳能电池性能退化的机理。本研究能够为高温应力条件导致的太阳能电池性能退化情况,提供有效的失效表征方法与分析方法。为进一步提高太阳能电池的可靠性,提供理论支持。
[Abstract]:Solar energy is widely used because of its inexhaustible, inexhaustible, clean and pollution-free advantages. The most successful way to use solar energy is solar photovoltaic power generation. A solar cell is a semiconductor device that converts light energy into electrical energy. When the cell works in a high temperature environment, the potential defects in the battery material, impurities and defects introduced in the manufacturing process are activated. The quality and reliability of batteries are seriously affected. Therefore, it is urgent to find an efficient and sensitive reliability characterization method. The failure modes and failure mechanisms of solar cells under high temperature stress are analyzed. The basic knowledge of noise and the source of noise in solar cells are summarized. On the basis of this, the accelerated experiment of solar cell aging at high temperature is established, and the test and analysis schemes are designed, including the design of bias circuit. According to the test scheme, the electrical parameters and noise parameters of the battery before and after the experiment were tested, and the methods of electrical parameters and noise parameters were compared and analyzed. The experimental results show that the noise parameter representation method can accurately and effectively reflect the degradation of the battery performance, and the noise parameter representation method is more sensitive than the electrical parameter representation method. Based on the mechanism of noise generation in semiconductor devices and the failure physics of solar cells, the causes of noise amplitude variation are analyzed from the point of view of the relationship between defects and carrier transport. The mechanism of performance degradation of solar cells is explained. This study can provide an effective method of failure characterization and analysis for the performance degradation of solar cells caused by high temperature stress conditions, in order to further improve the reliability of solar cells. Provide theoretical support.
【学位授予单位】：西安电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM914.4

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