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Journal Article
Investigation for a Highly Efficient Self-Powered Electrochromic Smart Window for Fast Response and Greater Maximum Transmittance Modulation
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- Authors
- Md Halim Hossain, Chil Seong Ah, Hojun Ryu
- Issue Date
- 2024-02
- Citation
- ACS APPLIED ELECTRONIC MATERIALS, v.6, no.2, pp.1514-1520
- ISSN
- 2637-6113
- Publisher
- AMER CHEMICAL SOC
- Language
- English
- Type
- Journal Article
- Abstract
- By dynamically managing light and heat, electrochromic smart windows (EC-SWs) could improve energy efficiency, occupant comfort, and sustainability, resulting in more energy-efficient and environmentally friendly buildings. However, the external power-driven or solar cell-integrated EC-SW could not fulfill the modern zero energy building purpose. Although recently self-powered EC-SW windows have been invented, their low transmittance modulation and slow response time make them unsuitable for industrial use. In this study, we reported a highly efficient, simple design, and low-cost WO3 self-powered EC window using a roll-to-roll (R2R) slot-die wet coating method where the transmittance modulation is approximately 80% at 600 nm wavelength and the spontaneous recovery time of about 60 s. The device provides around 1.2 V open circuit voltage, which is enough to power up the device itself, and thereby offers a self-powered and fast response EC-SW with high optical modulation.
- KSP Keywords
- Energy efficiency, Environmentally friendly, Fast Response, Highly efficient, Low transmittance, Low-cost, Occupant comfort, Open circuit voltage(OCV), Optical modulation, Recovery time, Roll-to-Roll