Using renewable energies for electricity production have appeared as an interesting alternative in recent years . In order to solve challenges relating to photovoltaic technology, inorganic perovskite oxides could offer significant advantages . These materials have specific piezoelectric and dielectric properties, it is possible to produce thicker cells absorbing more light and producing more electricity . To reduce greenhouse gas emissions, reduce the cost of solar cells production and increase their energy efficiency, we were interesting to inorganic ferroelectric perovskite PZN-4.5PT doped and undoped. Inorganic thin film PV is mainly based on CdTe, amorphous Si or CIGS. Very recently, hybrid perovskites emerged with a maximum yield of 23 % . However, these materials have problems of stability, reliability, toxicity and scale (cell size). Of course, research in this area is focused on solving these challenges, but success is not guaranteed. An alternative route, inorganic oxides, could have significant advantages. The ideal bandgap for an active photovoltaic layer for the solar spectrum is about 1.3 eV. However, oxides with such values are rare. One of the most studied oxides to date as a photovoltaic active layer is cuprous oxide Cu2O. Its bandgap width is around 2.1 eV and is therefore not ideal for the solar spectrum. Conversion efficiencies generally do not exceed 4%. In this project we propose to study a type of emerging solar cell that is based on ferroelectricity. In this type of solar cell, a junction p-n is not necessary, the opposite conventional solar cells. Interesting conversion efficiencies are starting to be achieved with this type of cell (up to 8.1% in 2015), however the mechanisms are still not well understood and several challenges at the material and engineering levels need to be addressed. Our aim is to fabricate a novel type of ferroelectric oxides perovskites (PZN-4.5PT) as thin film form using nanoparticles on silicon and conductive glass (ITO) substrates to improve the light absorption for high efficiency stable perovskite solar cells.