An inductively-coupled 64b organic RFID tag operating at 13.56MHz with a data rate of 787b/s

A 64b inductively coupled organic RFID tag on foil is demonstrated at 13.56MHz. The digital logic foil comprises 414 pentacene transistors and is powered by a pentacene double half-wave rectifier, connected to an inductive antenna. The data rate is 787b/s with load modulation behind the rectifier (DC). Also shown is a functional AC-modulated organic RFID tag. ©2008 IEEE.status: publishe

Direct X-ray photoconversion in flexible organic thin film devices operated below 1 V

The application of organic electronic materials for the detection of ionizing radiations is very appealing thanks to their mechanical flexibility, low-cost and simple processing in comparison to their inorganic counterpart. In this work we investigate the direct X-ray photoconversion process in organic thin film photoconductors. The devices are realized by drop casting solution-processed bis-(triisopropylsilylethynyl)pentacene (TIPS-pentacene) onto flexible plastic substrates patterned with metal electrodes; they exhibit a strong sensitivity to X-rays despite the low X-ray photon absorption typical of low-Z organic materials. We propose a model, based on the accumulation of photogenerated charges and photoconductive gain, able to describe the magnitude as well as the dynamics of the X-ray-induced photocurrent. This finding allows us to fabricate and test a flexible 2 × 2 pixelated X-ray detector operating at 0.2 V, with gain and sensitivity up to 4.7 × 10(4) and 77,000 nC mGy(−1) cm(−3), respectively