Terpolymer resin was synthesized by the condensation of 8-hydroxyquinoline5-sulphonic acid (8- HQ5-SA) and oxamide (O) with formaldehyde (F) in the presence of 2M HCl as catalyst with molar ratios of 1:1:2 reacting monomers. The electrical property of 8-HQ5-SAOF terpolymer resin was measured over a wide range of temperature (313 – 423 K). From the electrical conductivity of this terpolymer resin, activation energy of electrical conduction has been evaluated and was found to be 1.23 x 10-4 eV. The electrical conductivity of the terpolymer resin was found to be lies in the range of 3.95 x 10-9 to 2.77 x 10-5 ohm-1 cm-1. The plot of log s vs. 103 / T was found to be linear over a wide range of temperature, which indicates that the Wilson’s exponential law s = so exp (Ea / k T) is obeyed. On the basis of above studies this terpolymer can be ranked as semiconductor. When a voltage is applied to a thin film of this terpolymer resin then it has emitted light. This remarkable property of this terpolymer resin may be used to make a wide range of semiconducting and electronics electronic devices such as transistors, light emitting diodes, solar cells and even lasers which can be manufactured by much simpler way than conventional inorganic semiconductors.
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