Smart window of large transparency-tuning capacity  

作　　者：WANG YuZhe LI PengCheng OUYANG JianYong ZHU Jian 

机构地区：[1]Singapore Institute of Manufacturing Technology(SIMTech),Agency for Science,Technology and Research(A*STAR),Singapore 138634,Singapore [2]Department of Materials Science and Engineering,National University of Singapore,Singapore 117575,Singapore [3]Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China [4]School of Science and Engineering,Chinese University of Hong Kong at Shenzhen,Shenzhen 518172,China [5]Shenzhen Institute of Artificial Intelligence and Robotics for Society,Shenzhen 518129,China

出　　处：《Science China(Technological Sciences)》2023年第11期3107-3114,共8页中国科学（技术科学英文版）

基　　金：the support from the Singapore Institute of Manufacturing Technology(SIMTech),Agency for Science,Technology and Research(A*STAR),Singapore;the support from the Chinese University of Hong Kong,Shenzhen(Grant No.UDF01001987);Shenzhen Institute of Artificial Intelligence and Robotics for Society(Grant No.AC01202101113)。

摘　　要：Windows are one of the least energy-efficient components of a building.It allows energy to escape,leading to high cooling demand in summer and energy loss in winter.Sunlight and temperature in the building also affect people's health,comfort,and even productivity.As a result,controlling the heat and light entering the building dynamically is critical for improving the comfort of building occupants and reducing energy consumption.In this work,we develop a tunable smart window based on transparent dielectric elastomer actuators(DEAs)as an alternative solution to sunlight and temperature control.The transparency-tuning is achieved by creating wrinkles in a soft elastomer film made of waterborne polyurethane(WPU).The actuation mechanism is based on highly transparent dielectric elastomer actuators that use all solid-state stretchable transparent conductive polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/(PEDOT:PSS/WPU)as compliant electrodes.The modulation range of the smart tunable window with direct viewing is achieved to be 35%to 90%,which is one of the largest among existing tunable windows.At the low-transparency state,the window can also effectively block the heat and decrease the temperature rise to 2℃over 200 s,while the ambient temperature rises by 6℃with direct sunlight.We anticipate that this transparency-tuning mechanism is potentially useful for privacy protection,smart glass,projector screens,displays,and camouflage.The heat isolation feature also has the potential to reduce carbon emissions and improve the sustainability of buildings and greenhouses.

关 键 词：smart window dielectric elastomer transparency tuning transparent electrodes WRINKLES 

分 类 号：TU855[建筑科学] TU228