Full-frame and high-contrast smart windows from halide-exchanged perovskites

Window glazing plays an essential role to modulate indoor light and heat transmission, which is a prospect to save the energy cost in buildings. The latest photovoltachromic technology has been regarded as one of the most ideal solutions, however, to achieve full-frame size (100% active area) and hi...

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Veröffentlicht in:Nature communications 2021-06, Vol.12 (1), p.3360-3360, Article 3360
Hauptverfasser: Liu, You, Wang, Jungan, Wang, Fangfang, Cheng, Zhengchun, Fang, Yinyu, Chang, Qing, Zhu, Jixin, Wang, Lin, Wang, Jianpu, Huang, Wei, Qin, Tianshi
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Sprache:eng
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Zusammenfassung:Window glazing plays an essential role to modulate indoor light and heat transmission, which is a prospect to save the energy cost in buildings. The latest photovoltachromic technology has been regarded as one of the most ideal solutions, however, to achieve full-frame size (100% active area) and high-contrast ratio (>30% variable in visible wavelength) for smart window applicability is still a challenge. Here we report a photovoltachromic device combining full-transparent perovskite photovoltaic and ion-gel based electrochromic components in a vertical tandem architecture without any intermediated electrode. Most importantly, by accurately adjusting the halide-exchanging period, this photovoltachromic module can realize a high pristine transmittance up to 76%. Moreover, it possesses excellent colour-rendering index to 96, wide contrast ratio (>30%) on average visible transmittance (400-780 nm), and a self-adaptable transmittance adjustment and control indoor brightness and temperature automatically depending on different solar irradiances. Window glazing plays a crucial role in modulating indoor light and heat transmission, which is beneficial for energy saving. Here, Liu et al. report a full-frame and high-contrast smart windows made of perovskite photovoltaic and ion-gel electrochromic components to realise self-adjusting brightness and temperature regulator.
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-021-23701-z