Organic-Inorganic Composite Poly-N-Epoxypropylcarbazole-Nickel Phthalocynine-Cu2O Based Humidity Sensor

This paper presents the effect of variant humidity levels on the electrical parameters of organic inorganic composite (PEPC-NiPC-Cu2O) based humidity sensor. Silver thin films were deposited on cleaned glass substrate by thermal evaporator. Standard lithography technique was used to pattern pairs of silver electrodes of two distinct geometries (interdigited and rectangular). Humidity sensing layers of organic-inorganic composite were subsequently drop-casted to cover the separation between the silver electrodes. The electrical characterization of devices was performed as a function of humidity. Capacitance and resistance of the devices are found highly dependent upon relative humidity levels. Effect of two distinct geometries of semiconducting channel led us to optimization of sensor in terms of lower response and recovery time.