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A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring

Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan
Department of Electrical Engineering, National Taiwan University of Science and Technology, Taipei 10617, Taiwan
Author to whom correspondence should be addressed.
Academic Editors: Magnus Willander and Omer Nur
Sensors 2017, 17(4), 715;
Received: 20 February 2017 / Revised: 23 March 2017 / Accepted: 25 March 2017 / Published: 29 March 2017
(This article belongs to the Special Issue Self-Powered Sensors)
PDF [3642 KB, uploaded 29 March 2017]


A self-sustained multi-sensor platform for indoor environmental monitoring is proposed in this paper. To reduce the cost and power consumption of the sensing platform, in the developed platform, organic materials of PEDOT:PSS and PEDOT:PSS/EB-PANI are used as the sensing films for humidity and CO2 detection, respectively. Different from traditional gas sensors, these organic sensing films can operate at room temperature without heating processes or infrared transceivers so that the power consumption of the developed humidity and the CO2 sensors can be as low as 10 μW and 5 μW, respectively. To cooperate with these low-power sensors, a Complementary Metal-Oxide-Semiconductor (CMOS) system-on-chip (SoC) is designed to amplify and to read out multiple sensor signals with low power consumption. The developed SoC includes an analog-front-end interface circuit (AFE), an analog-to-digital convertor (ADC), a digital controller and a power management unit (PMU). Scheduled by the digital controller, the sensing circuits are power gated with a small duty-cycle to reduce the average power consumption to 3.2 μW. The designed PMU converts the power scavenged from a dye sensitized solar cell (DSSC) module into required supply voltages for SoC circuits operation under typical indoor illuminance conditions. To our knowledge, this is the first multiple environmental parameters (Temperature/CO2/Humidity) sensing platform that demonstrates a true self-powering functionality for long-term operations. View Full-Text
Keywords: self-sustained; printable organic sensors; sensing platform; SoC; power-gating self-sustained; printable organic sensors; sensing platform; SoC; power-gating

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Wu, C.-C.; Chuang, W.-Y.; Wu, C.-D.; Su, Y.-C.; Huang, Y.-Y.; Huang, Y.-J.; Peng, S.-Y.; Yu, S.-A.; Lin, C.-T.; Lu, S.-S. A Self-Sustained Wireless Multi-Sensor Platform Integrated with Printable Organic Sensors for Indoor Environmental Monitoring. Sensors 2017, 17, 715.

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