Open AccessMotion-Driven Electrochromic Reactions for Self-Powered Smart Window System
Author(s) -
MinHsin Yeh,
Long Lin,
PoKang Yang,
Zhong Lin Wang
Publication year - 2015
Publication title -
acs nano
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.554
H-Index - 382
eISSN - 1936-086X
pISSN - 1936-0851
DOI - 10.1021/acsnano.5b00706
Subject(s) - electrochromism , nanogenerator , triboelectric effect , materials science , energy harvesting , electronics , transmittance , nanotechnology , optoelectronics , electrical engineering , power (physics) , computer science , electrode , engineering , chemistry , physics , quantum mechanics , composite material , piezoelectricity
The self-powered system is a promising concept for wireless networks due to its independent and sustainable operations without an external power source. To realize this idea, the triboelectric nanogenerator (TENG) was recently invented, which can effectively convert ambient mechanical energy into electricity to power up portable electronics. In this work, a self-powered smart window system was realized through integrating an electrochromic device (ECD) with a transparent TENG driven by blowing wind and raindrops. Driven by the sustainable output of the TENG, the optical properties, especially the transmittance of the ECD, display reversible variations due to electrochemical redox reactions. The maximum transmittance change at 695 nm can be reached up to 32.4%, which is comparable to that operated by a conventional electrochemical potentiostat (32.6%). This research is a substantial advancement toward the practical application of nanogenerators and self-powered systems.
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