title: Motion-driven electrochromic reactions for self-powered smart window system.
abstract: 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.
authors: †School of Material Science, Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors: Min-Hsin
authors: MH
authors: Yeh
authors: †School of Material Science, Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors: Long
authors: L
authors: Lin
authors: †School of Material Science, Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.
authors: Po-Kang
authors: PK
authors: Yang
authors: †School of Material Science, Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, United States.|§Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing, China.
authors: Zhong Lin
authors: ZL
authors: Wang
keywords: electrochromic devices; energy harvesting; self-powered systems; smart windows; triboelectric nanogenerators