非晶硅太阳能电池陷光特性研究与参数反演

发布时间：2018-05-26 22:20

  本文选题：严格耦合波算法 + 微粒群优化算法　； 参考：《哈尔滨工业大学》2016年硕士论文

【摘要】：当物体的特征尺度接近热辐射波的波长时,热辐射将呈现出不同于传统辐射现象的特殊性质,利用这种特性可以实现控制物体热辐射特性的目的,光栅作为一种典型的周期性微结构,在太阳能电池、微电子散热、航天器热控等方面有着广泛的应用。本文利用微结构表面的光谱选择特性,针对非晶硅薄膜太阳能电池光电转换效率较低的问题设计出两种陷光结构,使得其对太阳光的吸收率明显增强,同时根据光栅特殊的光谱选择特性对不同种类光栅参数进行反演,为光栅结构参数的非接触检测提供了一种新方法。本文中的正问题算法采用严格耦合波算法,反问题算法采用微粒群优化算法。微结构光栅表面的光谱辐射特性与宏观尺度表面的光谱辐射特性产生差异的原因在于光栅表面可以激发表面等离子极化、表面声子极化和磁极化,本文采用严格耦合波算法,研究了光栅结构表面表现出波长选择性的机理。分析了光栅结构表面等离子体的色散关系,同时利用LC等效电路模型对磁极化的激发条件进行预测,并将其应用到非晶硅薄膜电池陷光结构的设计中。为了增强非晶硅薄膜电池对太阳光的吸收作用,本文首先研究了在薄膜电池基底上沉积金属光栅的陷光结构的光谱吸收特性。通过在吸收层和金属光栅之间激发表面等离子极化增强对入射光的吸收,该陷光结构可以显著增强薄膜电池在近红外区域的吸收作用;基于上述陷光结构,本文研究了分别在薄膜电池基底和顶部沉积光栅的陷光结构的光谱吸收特性,该陷光结构使得薄膜电池在0.3-0.5μm波段内的吸收率明显增强。同时,本文利用微粒群优化算法对光栅结构参数进行反演。反演对象包括槽型光栅、双槽型光栅、基底层矩形光栅结构薄膜电池、双层光栅结构薄膜电池。研究了参数变化对反演结果的影响,同时利用单波长入射波不同角度入射时的反射率对光栅结构进行反演。
[Abstract]:When the characteristic scale of the object is close to the wavelength of the thermal radiation wave, the thermal radiation will be different from the traditional radiation, which can be used to control the thermal radiation characteristics of the object. As a typical periodic micro structure, the grating is used in solar energy pool, microelectronic heat dissipation, spacecraft thermal control and so on. In this paper, by using the spectral selection characteristics of the microstructural surface, two kinds of trap structures are designed for the problem of low photoelectric conversion efficiency of the amorphous silicon thin film solar cells, which makes the absorption rate of the solar light obviously enhanced. At the same time, the parameters of different kinds of grating are retrieved according to the special spectral selection characteristics of the grating. A new method is provided for non-contact detection of gate structure parameters. In this paper, a strict coupled wave algorithm is adopted and particle swarm optimization is adopted in the inverse problem algorithm. The reason for the difference between the spectral radiation characteristics of the micro structure grating surface and the spectral radiation characteristics of the macro scale surface is that the surface of the grating can excite the surface. Plasma polarization, surface phonon polarization and magnetic polarization. In this paper, a rigorous coupled wave algorithm is used to study the mechanism of wavelength selectivity on the surface of the grating structure. The dispersion relation of the surface plasma of the grating structure is analyzed. At the same time, the excitation conditions of the magnetic polarization are predicted by the LC equivalent circuit model and applied to the amorphous silicon thin. In the design of the trapping structure of a membrane cell, in order to enhance the absorption of the solar light by the amorphous silicon thin film battery, the absorption characteristics of the trapping structure of the metal grating deposited on the substrate of the film battery were first studied. The absorption of the incident light was enhanced by the polarization of the surface excited by the absorption layer and the metal grating. The absorption of thin film cells in the near infrared region can be significantly enhanced. Based on the above structure, the spectral absorption characteristics of the trapping structures deposited on the substrate and the top of the thin film battery are studied. The absorption rate of the thin film battery in the 0.3-0.5 mu m band is obviously enhanced. The particle swarm optimization algorithm is used to invert the structure parameters of the grating. The inversion objects include groove gratings, double groove gratings, thin film cells of rectangular grating structure on the base layer, double grating structure film batteries. Row inversion.
【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】：TM914.4
，

本文编号：1939153