After illumination of solar cells to sun light or light source for a period of time, coated material which is responsible for photovoltaic effect or transfer of heat energy around focal point is erased or blown off.
We need a simulator to test the ageing coated material of solar cell in a quick period of time, This can be done by artificial sun simulators whose intensity is 20 times that of sun's intensity and spectral distribution with broad wavelength of around 200-900nm.
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