In this work, we report an active respiration monitoring sensor based on a piezoelectric-transducer-gated thin-film transistor (PTGTFT) aiming to measure respiration-induced dynamic force in real time with high sensitivity and robustness. It differs from passive piezoelectric sensors that the transducer signal is rectified amplified by PTGTFT. Thus, detailed easy-to-analyze rhythm waveform can be collected sufficient resolution. The rate, three phases of cycle, as well phase patterns further...

This paper addresses a wearable piezoelectric energy harvester that combines PVDF charge generator with an a-Si:H dual-gate thin-film transistor as rectifier. An analytical model and equivalent circuit elaborate their working principle device physics. A preliminary experimental study proves the concept demonstrates such is capable of generating microwatt-range power simple 90° finger bending action. Coupled low-cost large-area fabrication processes, pixelated energy-harvesting array can be...

Autonomous wearable biomedical sensors enable continuous human body vital signs monitoring with features such as being conformable, mobile, cost-effective and self-powered. In this work, we report on an autonomous multi-positional sensor capable of heart rate blood pressure monitoring. The device concept is based a piezoelectric-charge-gated thin-film transistor (PCGTFT) where polyvinylidene fluoride (PVDF) piezoelectric sandwich structure incorporated amorphous silicon (a-Si:H) dual-gate...

Tactile sensors that acquire force and temperature information are key to machine tactile intelligence. In this article, an active sensor incorporating array of 3-D field-coupled thin-film transistors (FCTFTs) with a 4 × pixelated polyvinylidene fluoride (PVDF)-based is studied. order enhance sensitivity reduce power consumption, FIN-shaped FCTFT designed subthreshold operation implemented. We have demonstrated its functions in human-machine interfacing, object characterization recognition,...

The use of radio frequency identification (RFID) technology for the automatic and communication physical parameters with on board integrated sensor attracts vast applications a large scale ranging from mobile healthcare to logistics, supply chains, robotics many others. Recently, RFID tags have been considered in wearable electronics. However, these devices are still empowered by battery. In this paper, we proposed designed self-sustainable tag electronics applications. A polyvinylidene...

We present a mechanical-filed-coupled thin-film transistor (TFT) intended for mechanical sensor applications. To apply the field to TFT, polyvinylidene fluoride (PVDF) piezoelectric transducer is vertically integrated with an amorphous silicon (a-Si:H) TFT form dual-gate where its top gate coupled field, bottom tune working regime, and channel layer in three-dimensional shape achieving high sensitivity. have demonstrated applications tactile sensitivity that can detect gentle dynamic touch...

This letter reports on a dual-mode wearable energy harvester that utilizes both piezoelectric and photoelectric effects. It integrates transducer with 3-D photosensitive dual-gate thin-film transistor (DGTFT) as rectifier buffer. The conversion efficiency is enhanced by reducing the internal resistance of DGTFT upon light illumination. Such promising for electronics.

This letter reports on an electronic device that works as a self-driven impulse sensor with high sensitivity and ultra-low power consumption. It consists of mechanical-field-coupled thin-film transistor (TFT) formed by integrating piezoelectric transducer 3-D FIN-shaped dual-gate TFT. An analytical model is presented to intricate the variation output current in response human force, experimental study conducted evaluate its capability acquiring waveforms well heart rate. The proposed...

Advances in mobile technology has increased availability, miniaturization and enhanced data rates demands. The evolution this paves path to design fabricate systems the field of health sciences. A low cost, secure portable monitoring system for elderly disabled chronic patients is presented paper. This an application running on laptop/mobile named as Telehealth Aggregation Manager (TAM), which collects from medical sensors such Glucometer, Thermometer etc connected through serial/Bluetooth...

A system level approach of a wearable rectified harvester array formed by integrating PVDF films and piezoelectric-charge-gated thin-film transistors (PCGTFTs) was addressed. Output power the upon various gratis non-stop daily trusts body movements has been conducted. peak few μW from gentle finger bending is achieved. The analysis voltage waveforms in response to both resistive capacitive loads unveils that such an capable quickly charging capacitor discharging it slowly allowing for...

This paper reports on formation of piezotronic heterojunction P-N diode to be utilized in tactile sensing and harvesting applications. Such junction-based rather than being an efficient wearable energy harvester also shows promising results sensitivity which is truly competitive the state-of-the-arts.

This paper presents the numerical analysis of compact, efficient, switched capacitor (i.e., magnetic-less) DC-DC converter which can be operated as a boost regulator with effect variable duty cycle, having efficiency ranging from 78% to 89%. The simulated results show that output voltage is two times its input approximately, varied change in cycle per user's requirement. Use reduced number switching devices major advantage proposed topology. Magnetic-less feature provides prospective high...

A flexible tactile sensor consisting of an array mechanical-field-coupled thin-film transistors (MFCTFTs) is presented. By laminating a PVDF film with dual-gate TFTs, the formed. To improve sensitivity, 3-D channel structure implemented in TFT. The force-induced deformation can be mapped 2×2 pixelated array, making it promising for electronic skin applications robotics.

This paper details the effect of diverse environmental light conditions on characterization a piezoelectric transducer biased photosensitive dual-gate thin-film transistor as dual-mode wearable harvester. It demonstrates that exposure harvesting module over ambient illuminations effectively decreases internal resistance DGTFT and results in peak voltage enhancement along with power increment. Ultimately an in-depth experimental analysis under distinct shapes daily usage pattern for further...