UV cured PVP gate dielectric for Flexible Organic Field Effect Transistors
08 Jul 2019-pp 1-3
TL;DR: In this paper, the authors report the UV curing of poly(4-vinylphenol) (PVP), which is a widely used polymer dielectric for flexible organic field-effect transistors.
Abstract: We report the UV curing of poly(4-vinylphenol) (PVP), which is a widely used polymer dielectric for flexible organic field-effect transistors. OFETs with UV cured PVP dielectric outperformed the classical long-term high temperature annealed PVP OFETs in electrical performance with lower hysteresis, lower threshold voltage shifts in 100 continuous transfer scans and lower normalized drain current decay when bias stressed for 1 h.
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TL;DR: It is demonstrated that the flexible pressure-sensitive organic thin film transistors fabrication can be used for non-invasive, high fidelity, continuous radial artery pulse wave monitoring, which may lead to the use of flexible pressure sensors in mobile health monitoring and remote diagnostics in cardiovascular medicine.
Abstract: Flexible pressure sensors are essential parts of an electronic skin to allow future biomedical prostheses and robots to naturally interact with humans and the environment. Mobile biomonitoring in long-term medical diagnostics is another attractive application for these sensors. Here we report the fabrication of flexible pressure-sensitive organic thin film transistors with a maximum sensitivity of 8.4 kPa(-1), a fast response time of 15,000 cycles and a low power consumption of <1 mW. The combination of a microstructured polydimethylsiloxane dielectric and the high-mobility semiconducting polyisoindigobithiophene-siloxane in a monolithic transistor design enabled us to operate the devices in the subthreshold regime, where the capacitance change upon compression of the dielectric is strongly amplified. We demonstrate that our sensors can be used for non-invasive, high fidelity, continuous radial artery pulse wave monitoring, which may lead to the use of flexible pressure sensors in mobile health monitoring and remote diagnostics in cardiovascular medicine.
1,691 citations
"UV cured PVP gate dielectric for Fl..." refers background in this paper
...Fabrication of OFETs on flexible substrate broadens their application area and aids towards printable electronics [6-8]....
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TL;DR: This study of electro-mechanical properties suggests that solution-processable organic semiconductors are suitable for applications in flexible electronics, provided that integration with other important technological advances, such as device scalability and low-voltage operation, is achieved in the future.
Abstract: Organic electronic materials are promising candidates for applications in which flexible electronic devices are required. Yi et al. demonstrate a high-performance, flexible organic transistor based on solution-processed small molecules that can be fabricated with a simple, low-cost process.
290 citations
"UV cured PVP gate dielectric for Fl..." refers background in this paper
...Organic field-effect transistors have been extensively explored in past few decades because of their advantages of solution processable and low cost [1-5]....
[...]
TL;DR: This paper presents the first printed organic 13-MHz RFID on flexible substrate, which includes a planar near field antenna bonded to an RFID tag, which is printed on flexible foil using an organic complementary TFT technology.
Abstract: This paper presents the first printed organic 13-MHz RFID on flexible substrate The proposed solution includes a planar near field antenna bonded to an RFID tag, which is printed on flexible foil using an organic complementary TFT technology Thanks to an active envelope detector, ASK modulation with modulation depth as low as 20% can be adopted to increase the available input power for the rectifier The RFID functionality is demonstrated at the internally generated supply voltage of 24 V, for a reading range of 2–5 cm and a bit-rate up to 50 bit/s With more than 250 transistors on the same foil, this work represents the most complex circuit ever published in a printed organic complementary TFT technology
121 citations
"UV cured PVP gate dielectric for Fl..." refers background in this paper
...Organic field-effect transistors have been extensively explored in past few decades because of their advantages of solution processable and low cost [1-5]....
[...]
TL;DR: A method of fabricating a thin and flexible emitting fabric utilizing organic light-emitting diodes (OLEDs) was developed in this work and an analysis of its mechanical bending characteristics and tests of its long-term reliability were carried out.
Abstract: Recently, the role of clothing has evolved from merely body protection, maintaining the body temperature, and fashion, to advanced functions such as various types of information delivery, communication, and even augmented reality. With a wireless internet connection, the integration of circuits and sensors, and a portable power supply, clothes become a novel electronic device. Currently, the information display is the most intuitive interface using visualized communication methods and the simultaneous concurrent processing of inputs and outputs between a wearer and functional clothes. The important aspect in this case is to maintain the characteristic softness of the fabrics even when electronic devices are added to the flexible clothes. Silicone-based light-emitting diode (LED) jackets, shirts, and stage costumes have started to appear, but the intrinsic stiffness of inorganic semiconductors causes wearers to feel discomfort; thus, it is difficult to use such devices for everyday purposes. To address this problem, a method of fabricating a thin and flexible emitting fabric utilizing organic light-emitting diodes (OLEDs) was developed in this work. Its flexibility was evaluated, and an analysis of its mechanical bending characteristics and tests of its long-term reliability were carried out.
112 citations
"UV cured PVP gate dielectric for Fl..." refers background in this paper
...Fabrication of OFETs on flexible substrate broadens their application area and aids towards printable electronics [6-8]....
[...]
TL;DR: This work combines screen-printing, high precision laser drilling and thermal evaporation, to fabricate organic field effect transistor (OFET) active-matrix (AM) arrays onto standard printer paper, demonstrating an 8 × 8 AM light emitting diode (LED) driver with programmable scanning and information display functions.
Abstract: The fabrication of electronic circuits on unconventional substrates largely broadens their application areas. For example, green electronics achieved through utilization of biodegradable or recyclable substrates, can mitigate the solid waste problems that arise at the end of their lifespan. Here, we combine screen-printing, high precision laser drilling and thermal evaporation, to fabricate organic field effect transistor (OFET) active-matrix (AM) arrays onto standard printer paper. The devices show a mobility and on/off ratio as high as 0.56 cm2V−1s−1 and 109 respectively. Small electrode overlap gives rise to a cut-off frequency of 39 kHz, which supports that our AM array is suitable for novel practical applications. We demonstrate an 8 × 8 AM light emitting diode (LED) driver with programmable scanning and information display functions. The AM array structure has excellent potential for scaling up.
111 citations
"UV cured PVP gate dielectric for Fl..." refers background in this paper
...Organic field-effect transistors have been extensively explored in past few decades because of their advantages of solution processable and low cost [1-5]....
[...]