Eradicating beta-trap induced bleached-state degradation in amorphous TiO2 electrochromic films

Shao, Peipei1; Huang, Siyuan1; Li, Bowen1; Huang, Qingjiao1; Zhang, Yiwen1; Wen, Rui-Tao1,2

2023

10.1016/j.mtphys.2022.100958

Materials Today Physics   影响因子和分区

2542-5293

Titanium dioxide (TiO2) draw great attention in developing electrochromic devices due to its low cost, dual-band optical modulation and wide potential window complementary to other EC films. Akin to other electrochromic oxides, TiO2 suffers from the tradeoff between cycling stability and large optical modulation because of the ion trapping effect. In this paper, we find formation of beta-traps can be prevented through adjusting the applied duration time at high potential, thus beta-traps induced bleached state degradation in amorphous TiO2 films can be eradicated. More importantly, we show the formed beta-traps locate at the TiO2/electrolyte interface, and are in-dependent of the employed electrolyte systems. The TiO2 based full electrochromic devices confirm beta-traps can be suppressed in a full device fashion. This work paves the way to understand the electrochromic performance degradation for oxide films upon square wave cycling and lays the foundation for adaptation in EC devices.

Electrochromic TiO 2 Electrolyte interface Square-wave ?-trap Ion trapping and detrapping

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of Guangdong[2022A1515010216] ; National Natural Science Foundation of China[52172294] ; "Shenzhen Science and Technology Innovation Commission[JCYJ20210324105402007] ; Guangdong Provincial Innovation and Entrepreneurship Project[2017ZT07C071] ; Guangdong Provincial Key Laboratory Program from the Department of Science and Technology of Guangdong Province[2021B1212040001] ; Shenzhen municipal government[Y01256130] ; Southern University of Science andTechnology[Y01256230]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000918354100001

ELSEVIER

20230213360698

Bleaching ; Cleaning ; Electrochromic devices ; Electrochromism ; Electrolytes ; Light modulation ; Optical signal processing

Electricity: Basic Concepts and Phenomena:701.1 ; Electric Batteries and Fuel Cells:702 ; Electronic Components and Tubes:714 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2 ; Papermaking Processes:811.1.1

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Peoples R China

Shao, Peipei,Huang, Siyuan,Li, Bowen,et al. Eradicating beta-trap induced bleached-state degradation in amorphous TiO2 electrochromic films[J]. Materials Today Physics,2023,30.

Shao, Peipei,Huang, Siyuan,Li, Bowen,Huang, Qingjiao,Zhang, Yiwen,&Wen, Rui-Tao.(2023).Eradicating beta-trap induced bleached-state degradation in amorphous TiO2 electrochromic films.Materials Today Physics,30.

Shao, Peipei,et al."Eradicating beta-trap induced bleached-state degradation in amorphous TiO2 electrochromic films".Materials Today Physics 30(2023).