Polymer opto-chemical-electronic based module as a detection system for volatile analytes on a foil substrate

Abstract

In this paper, we report on a novel device that addresses the needs for an efficient, field deployable and disposable system in the field of bio-chemical sensors using organic semiconductors. The Fraunhofer Institute has enabled a complete roll-to-roll manufactured polymer-opto-chemical-electronic module on a foil substrate, wherein an electroluminescent light source has been hetero-integrated together with an organic TFT, working as a photo-detector. A chemically sensitive, colour changing film is sandwiched in between the two elements to form an optical detection system for volatile analytes such as amines. The setup, henceforth referred to as the "PolyOpto" module, comprises of a dye coated layer that can detect specific chemical reactions by colour change inserted in between the EL light source and the OTFT photo-detector. A hole is laser cut through the system to allow the sensor layer to come in contact with the gases, which then through a chemical reaction, chang es colour and initiates a different response in the output of the organic transistor. Hence, this allows for a disposable chemo-analytical system that can be used in various application fields. As compared to conventional systems, the advantage here lies in the direct integration of the different functionalities without any advanced assembly steps, simultaneous use of coatings for both components (transparent electrode and wiring layer) and roll-to-roll compatibility, thus rendering a disposable system. We believe that it aptly demonstrates the capabilities of polytronics in functional integration for low-cost bio-sensor manufacturing

Transient and local illumination of an organic photoconductive sensor

“…In production the organic devices promise to be low cost because manufacturing can be performed using wet techniques [ 1 ] and/or roll-to-roll processing [ 2 ] . From the application point of view, the properties of organic materials allow to develop novel devices with interesting features.…”

Organic Field-Effect Transistors Based on a Liquid-Crystalline Polymeric Semiconductor using SU-8 Gate Dielectrics onFlexible Substrates

“…The solution-based deposition of polymeric gate dielectrics in organic field-effect transistors (OFET) has become a very attractive way to realize low-cost and flexible organic electronic devices on large areas for low-cost applications by using several kinds of deposition techniques, such as spray-coating [ 1 ], printing [ 2 ] or even web-coating [ 3 ]. The basic requirements of a dielectric typically cover good electrical insulation to increase the on/off-current ratio of a transistor and to reduce power consumption and high capacitances in order to lower the supply voltages.…”