Fabrication of multilayered conducting polymer heterostructure by self-assembly technique and its optical and electrical properties

A using multilayered conducting polymer heterostructure is fabricated by the self-assembly technique with a negatively charged conducting polymer, poly(3-α-carboxylmethylthiophene), and a positively charged conducting polymer, poly(dihexyldipropargyl ammonium bromide), and its optical and photovoltaic properties are studied. Photoluminescence from the positively charged conducting polymer is quenched markedly in the multilayered heterostructure system. The enhanced photovoltaic effect observed in a junction device with Al and ITO electrodes is explained in terms of photoinduced charge separation at the interface of conducting polymers.