Analyzing the PN junction impedance of crystalline silicon solar cells across varied illumination and temperature conditions

IF 6.3 2区 材料科学 Q2 ENERGY & FUELS Solar Energy Materials and Solar Cells Pub Date : 2024-11-05 DOI:10.1016/j.solmat.2024.113255
David A. van Nijen, Salem Naoom, Mirco Muttillo, Paul Procel, Miro Zeman, Olindo Isabella, Patrizio Manganiello
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Abstract

The impedance of solar cells can be leveraged for a variety of innovative applications. However, for the continued advancement of such applications, it is crucial to understand how the impedance varies during practical operation. This work characterizes the impedance of modern crystalline silicon solar cells across different bias voltages and under varying illumination and temperature conditions. It is found that for a given bias voltage, variations in temperature have a notably stronger impact on PN junction impedance than changes in irradiance. However, during maximum power point (MPP) tracking, variations in irradiance have a larger influence on the PN junction impedance than temperature variations. This is related to the shifting operating voltage during operation. Furthermore, it is shown that the capacitance during practical operation can strongly vary for different solar cells. For instance, the areal MPP capacitance values of the two cells tested in this study at 0.1 sun irradiance and a temperature of 30 °C were 0.283 μF/cm2 and 20.2 μF/cm2, a 71-fold difference. Conversely, the range of the MPP diffusion resistance was found to be highly similar for different cells. The results of this study enhance the understanding of solar-cell impedance and have a broad applicability.
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分析晶体硅太阳能电池在不同光照和温度条件下的 PN 结阻抗
太阳能电池的阻抗可用于各种创新应用。然而,为了继续推进此类应用,了解阻抗在实际操作过程中的变化情况至关重要。这项研究描述了现代晶体硅太阳能电池在不同偏置电压、不同光照和温度条件下的阻抗特性。研究发现,在给定偏置电压下,温度变化对 PN 结阻抗的影响明显大于辐照度变化。然而,在最大功率点(MPP)跟踪期间,辐照度变化对 PN 结阻抗的影响大于温度变化。这与运行过程中工作电压的变化有关。此外,研究还表明,不同太阳能电池在实际运行过程中的电容会有很大差异。例如,在 0.1 太阳辐照度和 30 °C 温度条件下,本研究中测试的两个电池的全面积 MPP 电容值分别为 0.283 μF/cm2 和 20.2 μF/cm2,相差 71 倍。相反,不同细胞的 MPP 扩散阻力范围非常相似。这项研究的结果加深了人们对太阳能电池阻抗的理解,具有广泛的适用性。
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来源期刊
Solar Energy Materials and Solar Cells
Solar Energy Materials and Solar Cells 工程技术-材料科学:综合
CiteScore
12.60
自引率
11.60%
发文量
513
审稿时长
47 days
期刊介绍: Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.
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