基于LambertW函数提取太阳电池五参数的方法及光强对参数影响的规律

发布时间：2018-04-16 09:38

本文选题：太阳电池 + 参数提取　；参考：《科学通报》2014年36期

【摘要】：基于Lambert W函数和多项式拟合,提出了一种太阳电池参数提取方法.该方法首先利用Lambert W函数将电池电流输出超越方程显化后积分,得显化积分方程;其次,基于质点平抛运动轨迹与电池伏安特性曲线相似性,对曲线分3段进行拟合后积分,得分段积分方程;最后,根据测量值建立显化积分方程与分段积分方程相等的方程组,解析求解出电池光电流、理想因子、反向饱和电流、串联和并联电阻5个电性参数.结果表明该方法的均方根误差为0.0047A,平均绝对相对误差为0.94%;证明了该方法的正确性.该方法应用于变光强下磷化铟镓/砷化铟镓/锗(In Ga P/In Ga As/Ge)三结太阳电池参数的提取,结果表明提取误差随着光强的增大而下降;原因是随着光强增大,噪声对测量的影响下降导致.且发现光电流随光强的增加而几乎线性增加,而理想因子、反向饱和电流、串联和并联电阻都随光强增加而下降;原因是当光强增加时,入射光子数线性增加、费米能级抬高、空间复合减少、分流路径增加导致的.
[Abstract]:Based on Lambert W function and polynomial fitting, a parameter extraction method for solar cells is proposed.The method firstly uses Lambert W function to manifest the transcendental equation of the battery current output, and obtains the explicit integral equation. Secondly, based on the similarity between the trajectory of the particle flattening motion and the volt-ampere characteristic curve of the battery, the curve is fitted into three sections.Finally, according to the measured values, the explicit integral equation and the piecewise integral equation are set up, and five electrical parameters, such as photocurrent, ideal factor, reverse saturation current, series and parallel resistance, are obtained.The results show that the root mean square error of this method is 0.0047A and the average absolute relative error is 0.94.The correctness of the method is proved.The method has been applied to extracting the parameters of indium gallium phosphide / indium gallium arsenide / indium gallium arsenide / in P/In Ga as / Ge3 junction solar cells under variable light intensity. The results show that the extraction error decreases with the increase of light intensity, and the reason is that the extraction error decreases with the increase of light intensity.The effect of noise on the measurement decreases.It is found that the photocurrent increases almost linearly with the increase of light intensity, while the ideal factor, reverse saturation current, series and parallel resistance all decrease with the increase of light intensity, the reason is that the number of incident photons increases linearly and the Fermi energy level is raised when the light intensity increases.The space compound reduces, the shunt path increases causes.
【作者单位】：南昌航空大学无损检测技术教育部重点实验室;
【基金】：国家自然科学基金(11264031) 江西省青年科学基金(20143ACB21011) 江西省发明专利产业化技术示范基金(20143BBM26116) 江西省自然科学基金(20132BAB202003) 集成光电子学国家重点联合实验室开放课题(IOSKL2012KF14)资助
【分类号】：TM914.4

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