超薄单晶硅光伏电池倒金字塔绒面设计及优化  

Design and Optimization of Inverted Pyramid Suede for Ultrathin Monocrystalline Silicon Photovoltaic Cells

作　　者：祁旭斌 向阳 杨阳 Qi Xubin;Xiang Yang;Yang Yang(School of Physics&Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454003,Henan,China)

机构地区：[1]河南理工大学物理与电子信息学院,河南焦作454003

出　　处：《激光与光电子学进展》2024年第13期335-342,共8页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(61308029);河南省科技攻关项目(222102210247)。

摘　　要：该研究构建具有倒金字塔绒面的前表面结构、双层减反膜、3μm厚的单晶硅吸收层、指交叉背接触电极、氧化物钝化层的超薄光伏电池模型,利用时域有限差分法(FDTD)求解电磁波在半导体中传播的麦克斯韦方程组,进而得到场分布,优化倒金字塔绒面的倾斜度,实现了最佳44.65 mA·cm^(-2)理想短路电流密度。利用小信号交流扫描求解描述载流子运动规律的漂移扩散方程和描述静电势的泊松方程,使用粒子群优化算法优化指交叉背接触电极位置以及掺杂浓度,获得该模型的伏安特性曲线,计算得到该模型光电转化效率为23.03%。This study constructed an ultrathin photovoltaic cell model with an inverted pyramid velvet surface front structure,doublelayer antireflection film,3μm thick singlecrystal silicon absorption layer,fingercrossed back contact electrode,and oxide passivation layer.The study first used the finitedifference timedomain(FDTD)method to solve the Maxwell equations of electromagnetic wave propagation in semiconductors,and it then obtained the field distribution.Next,the inclination of the inverted pyramid velvet surface was optimized and an optimal shortcircuit current density of 44.65 mA⋅cm^(-2) was achieved.The study used smallsignal alternating current scanning to solve the driftdiffusion and Poisson equations describing the carrier motion law and electrostatic potential,respectively.A particle swarm optimization algorithm was then employed to optimize the position and doping concentration of the fingercrossed back contact electrode.The model’s voltampere characteristic curve was obtained,and its photoelectric conversion efficiency was calculated to be 23.03%.

关 键 词：光伏电池效率 表面结构 时域有限差分法 超薄薄膜 

分 类 号：TM914.41[电气工程—电力电子与电力传动]