The spectral response of a solar cell is related to factors such as the structure, material properties, junction depth, and surface optical properties of the solar cell, and it also varies with ambient temperature, cell thickness, and radiation damage.
The spectral response represents the ability of photons of different wavelengths to generate electron-hole pairs. Quantitatively, the spectral response of a solar cell is the average number of carriers that can be collected per photon when light of a certain wavelength is illuminated on the surface of the cell. The spectral response of a solar cell is further divided into an absolute spectral response and a relative spectral response. The unit radiation energy of various wavelengths or corresponding photons are incident on the solar cell, which will generate different short-circuit currents. The corresponding short-circuit current curve obtained by the wavelength distribution is called the absolute spectral response of the solar cell. If each wavelength is incident on the solar cell with an equal amount of radiant light energy or equal photon number, the generated short-circuit current is compared with the maximum short-circuit current therein, and the ratio change curve is obtained according to the wavelength distribution, which is the solar cell. Relative spectral response. However, the absolute and relative spectral response, the higher the peak of the spectral response curve, the flatter the higher the short-circuit current density of the corresponding battery, and the higher the efficiency.
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