Three-diode lumped-parameter equivalent circuit model conforms to photovoltaic device physics and processes an exact analysis for I- V characteristics of industrial solar cells, because it explains the different leakage current components especially for recombination current resulting from defects or grain boundaries. However, three-diode model's complete circuit topology leads to complicated transcendental I- V equation without analytical solution so that low computation efficiency limits three-diode model's applications in photoelectric simulations. In this article, an effective-diode method is proposed to simplify three-diode model, derive accurate and efficient terminal current-voltage solution to three-diode model, and acquire electrostatic characteristics of the solar cells. The calculated values have good agreements with numerical iteration results and experimental data measured from solar cells, respectively. Finally, the effective-diode method performs an important role of solving three-diode model analytically, predicting I- V characteristics of industrial solar cells accurately, and providing three-diode model's practicability and development in solar cells' simulations.

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根据三二极管集总参数模型对工业太阳能电池进行基于有效二极管的分析


三二极管集总参数等效电路模型符合光伏器件物理原理，可以对工业太阳能电池的 I-V 特性进行精确分析，因为它解释了不同的漏电流分量，尤其是缺陷或晶界引起的复合电流。然而，三二极管模型的完整电路拓扑导致超越IV方程复杂而无解析解，计算效率低，限制了三二极管模型在光电模拟中的应用。本文提出了一种有效二极管方法来简化三二极管模型，导出三二极管模型的准确有效的端电流-电压解，并获取太阳能电池的静电特性。计算值分别与数值迭代结果和太阳能电池测量的实验数据吻合良好。最后，有效二极管方法在解析求解三二极管模型、准确预测工业太阳能电池的I-V特性、为三二极管模型在太阳能电池模拟中的实用性和发展方面发挥了重要作用。