Liu You, Wang Jungan, Wang Fangfang, Cheng Zhengchun, Fang Yinyu, Chang Qing, Zhu Jixin, Wang Lin, Wang Jianpu, Huang Wei, Qin Tianshi
Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), Nanjing, Jiangsu, China.
Key Laboratory for Organic Electronics & Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications, Nanjing, Jiangsu, China.
Nat Commun. 2021 Jun 7;12(1):3360. doi: 10.1038/s41467-021-23701-z.
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.
窗户玻璃在调节室内光和热传输方面起着至关重要的作用，这对于节省建筑能源成本具有重要意义。然而，最新的光致变色技术虽被视为最理想的解决方案之一，但要实现适用于智能窗户的全框架尺寸（100% 有效面积）和高对比度（可见光波长变化 >30%）仍具有挑战性。在此，我们报道了一种光致变色器件，它将全透明钙钛矿光伏和基于离子凝胶的电致变色组件以垂直串联结构结合在一起，且没有任何中间电极。最重要的是，通过精确调整卤化物交换周期，这种光致变色模块可实现高达 76% 的高初始透过率。此外，它具有高达 96 的出色显色指数，在平均可见光透过率（400 - 780 nm）上具有宽对比度（>30%），并且能够根据不同的太阳辐照度自动自适应调节透过率，控制室内亮度和温度。
