dye sensitized solar cell fabricated using a cobalt nitrate complex containing phosphoramide ligands

A cobalt nitrate complex containing phosphoramide ligands with formula co(no3)2(l)(ch3oh), where l = (4-no2-c6h4nh)p(o)cl(nh-c5h4n-2), was synthesized and characterized the 31p{1h} nmr spectrum of complex 1 revealed a singlet pea at -227 ppm confirimg the purity of this compound the fluorescence spectrum of compound 1 displayed that the (max) of emission was appeared at 4135 nm the sem micrograph indicated that the nanoparticle diameters were about 20-50 nm and they had a spherical morphology the tem image of dye 1 illustrated that size of all the particles were below ~25 nm and their agglomeration formed almost spherical shapes the dft calculations showed that the energies of homo and lumo orbitals of phosphoramide ligand and compound 1 at b3lyp level were equal to -7182, -3213 ev and -6728, -3824 ev, respectively the homo and lumo energies of the tio2were obtained as -7031, -4947 ev the cobalt nitrate complex was used as dyes for absorbing light in dye sensitized solar cell (dssc) and the efficiency of the cell was obtained equal to 049%