Study of silicon solar cell at different intensities of illumination and wavelengths using impedance spectroscopy

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• 作者：Sanjai Kumar ; P.K. Singh ; G.S. Chilana
• 关键词：Solar cell ; Impedance spectroscopy ; Dynamic and static characteristics ; Spectral response
• 刊名：Solar Energy Materials and Solar Cells
• 出版年：2009
• 出版时间：October 2009
• 年：2009
• 卷：93
• 期：10
• 页码：1881-1884
• 全文大小：323 K

文摘

The electrical properties of an n⁺–p–p⁺ structure-based single-crystalline silicon solar cell were studied by impedance spectroscopy, I–V and spectral response. The impedance spectrum is measured in dark, under different intensities (14, 43, 57, 71, 86, 100&#xa0;mW/cm²) of illumination and wavelengths (400–1050&#xa0;nm) of light. Under dark and at low intensities of illumination (<50&#xa0;mW/cm²) the impedance spectra show perfect semicircles but at high intensities the semicircles are distorted at low frequencies. It is found that illumination provides an additional virtual R₁C₁ network parallel to the initial bulk R_pC_p network observed under dark conditions. The value of virtual resistance R₁ depends on the illumination wavelength and shows an inverse relationship with the spectral response of the device.