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 

机构地区：[1]State Key Laboratory of Bio-Fibers and Eco-Textiles&Institute of Marine Biobased Materials&Collage of Materials Science and Engineering,Qingdao University,Qingdao 266071,China [2]School of Physical Science and Technology,Jiangsu Key Laboratory of Thin Films,Center for Energy Conversion Materials&Physics(CECMP),Soochow University,Suzhou 215006,China

出　　处：《Journal of Materials Science & Technology》2022年第35期35-43,共9页材料科学技术（英文版）

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。

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.

关 键 词：Sodium alginate PEROVSKITE Phase transition THERMOCHROMISM Light regulation 

分 类 号：TB34[一般工业技术—材料科学与工程] TU201.5[建筑科学—建筑设计及理论]