Evangéline Bènevent

High-Gain Fully Printed Organic Complementary Circuits on Flexible Plastic Foils

We present several fully printed organic complementary circuits using n- and p-type organic thin-film transistors. n-Type and p-type devices are developed on a flexible polyethylene-naphthalate substrate. All organic layers are deposited using a low-cost screen-printing technique. The inverters show a high gain and a switching point at exactly VDD/2. A seven-stage voltage-controlled oscillator (VCO) is designed with an organic output buffer, using the n- and p-type organic transistors. This VCO oscillates at a frequency of 186 Hz. Finally, two complementary differential amplifiers with high gain and large bandwidth are presented. The amplifiers only draw a 1-μA current from a 40-V power supply.

Design of organic complementary circuits for RFID tags application

This paper presents organic complementary circuits that can be used in an all-organic sheet-to-sheet processed RFID tag on plastic foils. An integrated organic eight-stage rectifier reaching a 14 MHz maximum working frequency is presented, as well as a physical unclonable function generator able to generate a code depending on the organic process scattering.

Temperature sensor on flexible substrate patterned by laser ablation

This paper presents fabrication and characterization of flexible temperature sensor patterned by laser ablation. This work covers the preliminary study on the resistive temperature devices (RTDs) reference sensors used to measure the temperature of human body for health applications. The sensors are composed of different materials like platinum (Pt), copper (Cu) and silver (Ag) as sensitive materials. These different sensitive materials have been deposed on flexible substrate (Kapton®) by radiofrequency (RF) magnetron sputtering process and patterned by laser ablation using a femtosecond laser. The performance of the temperature sensors is evaluated and compared.