VOPcPhO based organic pressure sensor and displacement transducer

• Organic pressure sensor and displacement transducer have been fabricated and characterized.
• The devices exhibit repeatable and reversible response with acceptable value of hysteresis.
• The devices are analyzed and modeled using newly derived mathematical expressions.

In this paper, we report on the fabrication and characterization of organic based pressure sensor and displacement transducer. For the purpose, an organic semi-conductor, Vanadyl 2,9,16,23-tetraphenoxy-29H,31H-phthalocyanine (VOPcPhO), is employed as an active material. The fabrication was done on the PEDOT:PSS coated ITO-glass substrates by the methods of spincoating and dropcasting for the displacement transducer and pressure sensor, respectively. By considering the elastic properties of the devices under external mechanical pressure, reversible measurements of the devices' electrical outputs have been demonstrated. The pressure–capacitance and displacement–capacitance relationships have been obtained from the measurement of the capacitance output of the devices, which afterwards further analyzed and modeled using mathematical expressions. The data analysis suggests a linear pattern of the capacitance–pressure from the devices in the specific ranges of the pressure and displacement.