Electrospun perovskite nano-network for flexible, near-room temperature, environmentally friendly and ultrastable light regulation

作     者：Yongliang Li Haoxuan Sun Zhen Li Min Wang Linqi Guo Liangliang Min Fengren Cao Yeqiang Tan Liang Li Yongliang Li;Haoxuan Sun;Zhen Li;Min Wang;Linqi Guo;Liangliang Min;Fengren Cao;Yeqiang Tan;Liang Li

作者机构：State Key Laboratory of Bio-Fibers and Eco-Textiles&Institute of Marine Biobased Materials&Collage of Materials Science and EngineeringQingdao UniversityQingdao 266071China School of Physical Science and TechnologyJiangsu Key Laboratory of Thin FilmsCenter for Energy Conversion Materials&Physics(CECMP)Soochow UniversitySuzhou 215006China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第130卷第35期

页      面：35-43页

核心收录：

学科分类：08[工学] 081302[工学-建筑设计及其理论] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0813[工学-建筑学] 

基　　金：support from the National Natural Science Foundation of China (52025028,51772197,51872191 52002258) the 1000 Youth Talents Plan the Shandong Provincial Natural Science Foundation (Nos.ZR2021JQ16,ZR2019YQ19) the Project of Shandong Province Higher Educational Science and Technology Program (No.2019KJA026) the State Key Laboratory of Bio-Fibers and Eco-Textiles (Nos.ZKT13,ZKT11) Science and technology project of Shinan District (No.2020-2-003-QT) the Natural Science Foundation of Jiangsu Province (Nos.BK20200877,BK20210728) Funded by the Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions 

主　　题：Sodium alginate Perovskite Phase transition Thermochromism Light regulation 

摘      要：Light regulation devices are essential for signal modulation, information encryption and energy-saving smart windows. Recently, due to their excellent stimuli-responsive properties, lead halide perovskites have shown great potential. However, the high transition temperature, irreversibility of the phase transition and toxicity of heavy metals make perovskite materials unsuitable for devices related to human activity. Herein, for the first time, a flexible perovskite nano-network is proposed and its application as a smart window is demonstrated. The perovskite-sodium alginate(SA) nano-network showed a 31.6 ℃(20% RH) transition temperature and stability over 1200 cycles. The hydrophobic surface and the “eggbox structure formed by SA make that the lead leakage is only 2.569 ppb, which is much higher than the drinking water standard. This work provides a successful demonstration for energy-efcient buildings and inspires future nontoxic perovskite-based devices through heavy metal control.