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Multijunction Solar Cell Designs Using Silicon Bottom Subcell and Porous Silicon Compliant Membrane

机译:使用硅底部子电池和多孔硅兼容膜的多结太阳能电池设计

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摘要

A novel approach to the design of multijunction solar cells on silicon substrates for 1-sun applications is described. Models for device simulation, including porous silicon layers, are presented. A silicon bottom subcell is formed by diffusion of dopants into a silicon wafer. The top of the wafer is porosified to create a compliant layer, and a III–V buffer layer is then grown epitaxially, followed by middle and top subcells. Because of the resistivity of the porous material, these designs are best suited to high-efficiency 1-sun applications. Numerical simulations of a multijunction solar cell that incorporates a porous silicon-compliant membrane indicate an efficiency of 30.7% under AM1.5G, 1-sun for low-threading dislocation density, decreasing to 23.7% for a TDD of 10$^{7}$ cm $^{-2}$.
机译:描述了一种用于1-sun应用的硅基板上多结太阳能电池设计的新颖方法。提出了用于器件仿真的模型,包括多孔硅层。通过将掺杂剂扩散到硅晶片中来形成硅底部子电池。晶圆顶部经过多孔处理以形成柔顺层,然后外延生长III–V缓冲层,然后是中间和顶部子电池。由于多孔材料的电阻率,这些设计最适合于高效的1-sun应用。包含多孔硅顺应性膜的多结太阳能电池的数值模拟表明,在AM1.5G下,效率为30.7%,对于低螺纹位错密度,为1-sun,对于10的TDD,效率降至23.7%。 inline“> $ ^ {7} $ cm $ ^ {-2} $ < / tex>

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