Synthesis and Characterization of Phthalocyanine-Based Soluble Light-Harvesting CIGS Complex

An easy and versatile solution-based route for the synthesis of a new phthalocyanine-based light-harvesting material PCIGS [Cu 2 ( t Bu 4 PcGa)( t Bu 4 PcIn)S 2 TPP 2 ] is described. This material is prepared through a one-pot reaction of t Bu 4 PcM-Cl (M = Ga, In), CuI, and [(CH 3 ) 3 Si] 2 S in the presence of triphenyl phosphine. In contrast to the dilute solution, the linear absorption coefficient of PCIGS complex in the solid state (α 0 = 145.35 cm - 1 ) is about 150 times greater than the dilute solution (α 0 = 0.95 cm - 1 ) under the conditions of the study. The molecular structure of this material is proposed on the basis of the extended X-ray absorption fine structure spectroscopy.