چكيده به لاتين
Nature involves mysterious events being chased by human since long time ago. Focusing on wonderful photosynthesis process and digging in it deeply, we encounter photosystem1 complex existing in plants, alga and some cyanobacteria which are capable of photon absorption, as a natural photodiode with quantum efficiency nearly to unit, and electron generation in order to produce carbohydrates. Highly significant functionality of photosystem1 alongside other photosynthesis organs, inspired researchers of green energies especially solar cell to pay much of their attention to this protein complex. Since 2013, studies in this filed have been done in our country and currently we are optimizing solar cells based on photosystem1 which this thesis explain it. In first step, we conducted the protein extraction desirably, utilizing Chromatography purification and dialysis method. Then it turned to coating on transparent indium-tin oxide electrode. Referencing to our previous work, we used tyrozine amino-acid substrate to make the surface uneven for increasing the cross section of protein impact with tyrozine substrate and also protecting the protein layer moisture. In the next step, we employ a middle layer between protein layer and metallic electrode (gold cathode), including graphene oxide which has been reduced by Bovine Serum Albumin (BSA). In fact, benefiting of this layer rather previous work, we could increase the electric current density from 3.47 to 5.74 m.A/cm2 leading to the efficiency increase of this type of solar cell from 0.517 to 0.761.
