I do not understand what this means. Could you elaborate a little more on the question? Solar spectrum consists of photons with various energy. Are you asking if the solar panel would absorb photons throughout the entire spectrum?
Then the answer is no. Though the range of spectrum in which the solar panel absorbs depends on exactly what type of solar panel you are looking at. Even if you say Si-solar panels, there are single-crystal, amorphous, polycrystalline types out there. They all have different absorption spectra. If you are talking about conversion spectrum, then it is going to be even narrower.