Journal of the Korea Institute of Information and Communication Engineering (한국정보통신학회논문지)

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Nanostructured energy harvesting devices and their applications for IoT sensor networks

나노구조체 에너지 하베스팅 소자와 IoT 센서 네트워크의 융합 연구

  • Yoon, Chongsei (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Jeon, Buil (School of Electrical Engineering, Korea Advanced Institute of Science and Technology) ;
  • Yoon, Giwan (School of Electrical Engineering, Korea Advanced Institute of Science and Technology)
  • Received : 2021.02.08
  • Accepted : 2021.04.20
  • Published : 2021.05.31
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Abstract

We have demonstrated a sandwich-type ZnO-based piezoelectric energy harvesting nanogenerator, namely ZCZ-NG device, composed of symmetrically stacked layers of ZnO/carbon tape/ZnO structure. Especially, we have adopted a conductive double-sided adhesive carbon tape in an effort to fabricate a high-quality ZCZ-NG device, leading to its superior output performance in terms of the peak-to-peak output voltage. Effects of the device size, ZnO layer thickness, and bending strain rate on the device performance have been investigated by measuring the output voltage. Moreover, to evaluate the effectiveness of the fabricated ZCZ-NG devices, we have experimentally implemented a sensor network testbed which can utilize the output voltages of ZCZ-NG devices. This sensor network testbed consists of several components such as Arduino-based transmitter and receiver nodes, wirelessly transmitting the sensed information of each node. We hope that this research combining the ZnO-based energy harvesting devices and IoT sensor networks will contribute to the development of more advanced energy harvester-driven IoT sensor networks in the future.

본 논문에서는 산화아연/탄소 테이프/산화아연의 대칭 구조를 갖는 ZCZ-NG라는 샌드위치형 산화아연(ZnO) 압전 에너지 하베스팅 소자를 제시한다. 고품질의 ZCZ-NG 소자를 제작하기 위해 전도성 양면 접착 탄소 테이프를 활용하였으며, 이는 매우 높은 피크 투 피크 전압(Vpp)을 발생시키는 ZCZ-NG 소자의 개발로 이어졌다. ZCZ-NG 소자의 크기, 산화아연 층의 두께 그리고 벤딩 변형률 변화에 따른 ZCZ-NG 소자의 출력 성능 변화를 측정, 분석하였다. 또한 제작된 ZCZ-NG 소자의 실효성 및 응용 가능성을 검증하기 위한 실험적인 센서 네트워크 테스트베드를 구축하였다. 상용 아두이노를 기반으로 한 송신, 수신 노드들로 이루어진 테스트베드에서 노드들은 각 노드에서 감지한 정보들을 무선으로 송수신한다. 본 연구에서 사용된 대칭 구조의 샌드위치형 ZCZ-NG 소자 제작 기술과 센서 네트워크와의 융합 연구가 앞으로 더 발전되어 사물인터넷 구현을 위한 자가발전 센서 네트워크 연구에 도움이 되길 바란다.

Keywords

Acknowledgement

This research was supported by the Basic Science Research Program through the National Research Foundation of Korea(NRF) funded by the Ministry of Education (Grant No.2016R1D1A1B01007074).

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