Temperature dependence of the short circuit current and spectral responsivity of various kinds of crystalline silicon photovoltaic devices

The short-circuit current I sc and spectral responsivity (SR) of crystalline silicon (c-Si) photovoltaic (PV) modules and cells are investigated at various device temperatures. The long-wavelength tail of SR shifts toward longer wavelengths as the temperature increases. Although the wavelength shift Δλ per temperature difference ΔT is dependent on the device structure and λ, the present results show that the shift in the quantum efficiency (QE), which is related to SR by QE ≈ SR × 1240/λ, can be approximated using the wavelength-independent constant of Δλ/ΔT ~ 0.45 nm/K for various types of c-Si device. The results indicate that the temperature dependence of SR can be approximated using a simple relation for various types of c-Si PV device, which greatly improves the precision of spectral mismatch correction when SR at only one temperature is available.