带电粒子辐照c-Si电池的PTR响应与光热成像检测研究

发布时间：2018-03-24 04:33

本文选题：PTR响应　切入点：红外锁相光热成像　出处：《哈尔滨工业大学》2016年硕士论文

【摘要】：近年来,随着航空航天技术的发展,空间航天飞行器的发射任务急剧增加,空间太阳能电池作为其主要能源供给系统暴露在空间环境中,必然会受到带电粒子辐照使其性能衰退、效率降低,影响航天飞行器在轨运行与服务的稳定性、可靠性及服役寿命。因此,寻找准确、无损、高效的检测方法评价辐照电池的性能至关重要。光热辐射检测(Photothermal radiometry,PTR)技术作为一种新型无损检测技术,可用于太阳能电池光电性能的非接触检测与评价。本文主要研究了太阳能电池的少数载流子传输过程及调制激光激发的一维热波数学模型、带电粒子(电子和质子)辐照太阳能电池的运动轨迹及能量损失、带电粒子辐照单晶硅电池的PTR频域响应与扫描成像检测和电性能非均匀分布的非接触光热成像检测。将太阳能电池结构等效为pn突变结的两层一维结构,建立了调制激光激发太阳能电池的少数载流子密度波模型,并基于光激发太阳能电池的热损耗机制建立了耦合少数载流子密度波的一维热波数学模型;利用建立的一维热波数学模型仿真分析了少数载流子寿命、扩散系数及后表面复合速率对PTR幅频特性的影响。采用蒙特卡洛法仿真分析了带电粒子辐照太阳能电池的损伤原因,通过带电粒子辐照c-Si电池的PTR检测试验研究了带电粒子类型及注量对PTR幅频特性的影响及规律;通过PTR扫描成像试验研究了不同注量电子辐照c-Si电池的损伤非均匀特性。基于太阳能电池的能量热损耗机制,建立了太阳能电池的少数载流子非辐射复合热损耗数学模型;在此基础上,采用红外锁相光热成像实现了对带电粒子辐照c-Si电池的电性能参数的非接触检测,利用统计方法分析了辐照损伤c-Si电池电性能参数的分布不均匀性。
[Abstract]:In recent years, with the development of aeronautics and space technology, the launch missions of space vehicles have increased dramatically. Space solar cells as its main energy supply system are exposed to the space environment. It is necessary to be irradiated by charged particles to degrade its performance and reduce its efficiency, which will affect the stability, reliability and service life of spacecraft in orbit. It is very important to evaluate the performance of irradiated battery by high efficient testing method. Photothermal radiation measurement (PTRR) is a new nondestructive testing technique. It can be used for the non-contact detection and evaluation of photovoltaic performance of solar cells. This paper mainly studies the minority carrier transmission process of solar cells and the one-dimensional thermal wave mathematical model excited by modulated laser. Trajectory and energy loss of solar cells irradiated by charged particles (electrons and protons), The PTR frequency domain response and scanning imaging of charged particle irradiated monocrystalline silicon cells and the noncontact photothermal imaging detection of non-uniform distribution of electrical properties are measured. The solar cell structure is equivalent to a two-layer one-dimensional structure with a pn abrupt junction. The minority carrier density wave model of modulated laser induced solar cell is established, and the one-dimensional thermal wave mathematical model of coupling minority carrier density wave is established based on the thermal loss mechanism of photoexcited solar cell. The effects of minority carrier life, diffusion coefficient and recombination rate on PTR amplitude-frequency characteristics are simulated by using the established one-dimensional thermal wave mathematical model. The damage causes of solar cells irradiated by charged particles are simulated by Monte Carlo method. The influence of charged particle type and flux on the amplitude and frequency characteristics of PTR was studied by PTR test of charged particle irradiated c-Si battery. The damage nonuniformity of c-Si cells irradiated by different flux electrons was studied by PTR scanning imaging test. Based on the mechanism of energy and heat loss of solar cells, a mathematical model of minority carrier non-radiation composite heat loss of solar cells was established. On this basis, infrared phase-locked photothermal imaging is used to realize the non-contact detection of the electrical performance parameters of c-Si cells irradiated by charged particles, and the non-uniformity of the electrical performance parameters of irradiated c-Si cells is analyzed by statistical method.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V442

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