Nitrogen-doped carbon dots-modified Prussian blue with sandwichlike structure as a high-performance electrochromic material  

作　　者：Yaqi Zhang Lide Li Siming Zhao Yilin Ding Nan Shen Yujie Sun Hao Wang Jingfa Li Rufan Zhang 

机构地区：[1]School of Chemistry and Materials Science,School of Physics and Optoelectronic Engineering,Nanjing University of Information Science and Technology,Nanjing 210044,China [2]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Nano Research》2024年第10期9174-9180,共7页纳米研究（英文版）

基　　金：supported by Jiangsu Specially Appointed Professor program;the Tsinghua-Toyota Joint Research Fund;the National Key Research and Development Program of China(Nos.2020YFC2201103 and 2020YFA0210702).

摘　　要：Prussian blue(PB),as a promising inorganic electrochromic material(ECM),has been widely used in smart windows,displays,sensors,etc.However,there are still many challenges for PB to achieve high electrochromic performance.Herein,we synthesized nitrogen-doped carbon dots-modified PB film(defined as PB@N-CDs)with a sandwich-like structure by a simple stepwise electrodeposition method.The carbon dots show an obvious advantage in ultrafast electron transfer ability,which can reduce charge loss during the transfer process,improve the electrochemical activity on both sides of PB,and thus facilitate a rapid electrochromic response.Furthermore,the surface of nitrogen-doped carbon dots contains multiple organic functional groups,which widen the movement path of K+ions under electrostatic adsorption.Impressively,the PB@N-CDs film exhibits a short bleaching/coloring time(0.5/0.9 s)and a superior optical modulation range(78.6%).Particularly,the coloring efficiency has been significantly improved to 137.71 cm^(2)/C(at 700 nm).All of these results open up new avenues for developing highperformance PB-based ECMs and promoting their applications in corresponding electrochromic devices(ECDs)and smart windows.

关 键 词：electrochromic Prussian blue carbon dots NANOSTRUCTURE 

分 类 号：O15[理学—数学]