The oligothiophene derivative. 5,5 " ' -bis(aminorthyl) 2,2 ' :5 ' .2 " :5 ", 2 " ' -quaterthiophene (AEQT). has been incorporated within a lead(il) halide-based perovskite framework. Single crystal X-rai analysis has been used to, verify the peroskite framework and examine the ordering of the dvt cations within the structure. Thin films of (AEQT)PbX4 (X = CI. Br. and I) have also been thermally ablated onto quartz substrates and the optical properties of the films have been examined. Strong photoluminescence from the quarterthiophene moiety is observed for X = Cl, with an emission peak at approximately lambda (max) = 532 nm, Similar photoluminescence is observed for the X = Br and I materials. but with progressively less intensity. as the band gap of the inorganic framework gets smaller relative to the LUMO-HOMO gap of the dye molecule. (AEQT)PbCl4 films have also been incorporated as emission layers in light emitting devices (LED) and intense rr,om temperature electroluminescence has been observed.