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

You Liu, Jungan Wang, Fangfang Wang, Zhengchun Cheng, Yinyu Fang, Qing Chang, Jixin Zhu, Lin Wang, Jianpu Wang, Wei Huang () and Tianshi Qin ()
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You Liu: Nanjing Tech University (NanjingTech)
Jungan Wang: Nanjing Tech University (NanjingTech)
Fangfang Wang: Nanjing Tech University (NanjingTech)
Zhengchun Cheng: Nanjing Tech University (NanjingTech)
Yinyu Fang: Nanjing Tech University (NanjingTech)
Qing Chang: Nanjing Tech University (NanjingTech)
Jixin Zhu: Nanjing Tech University (NanjingTech)
Lin Wang: Nanjing Tech University (NanjingTech)
Jianpu Wang: Nanjing Tech University (NanjingTech)
Wei Huang: Nanjing University of Posts and Telecommunications
Tianshi Qin: Nanjing Tech University (NanjingTech)

Nature Communications, 2021, vol. 12, issue 1, 1-8

Abstract: Abstract 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.

Date: 2021
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DOI: 10.1038/s41467-021-23701-z

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