Photo-stability of the photons converter applied in the photovoltaic conversion systems

In this work we develop the idea of using a poly methyl methacrylate (PMMA) polymer doped with optically active molecules such as photovoltaic encapsulation materials. The effect of this encapsulation system on the incident solar spectrum has been obtained from direct allowed transition after the samples have been exposed to sunlight. A resulting, the incident solar spectrum at the interface is red-shifted for a better fit with the spectral response of SiO2/Si solar cell structures. The simulation results showed that the short-circuit current density increased by 7%. Therefore the mechanism of the photo-degrading by UV illumination of an LDS has been studied to identify molecular changes that occur in the organic dye when exposed to UV light. The photo-degrading effect of the PMMA layer was measured by CONICA-MINOLTA spectrometer, as a function of increasing exposure time to UV light. The UV Photo-degrading studies revealed that the more photo-stable dye doped in value.