Boosting charge-transfer kinetics and cyclic stability of complementary WO3–NiO electrochromic devices via SnOx interfacial layer

Journal of Science: Advanced Materials and Devices

Hongtao Cao¹  Weiping Xie²  Dong Qiu³  Lingyan Liang⁴  Kai Tao⁵  Hongliang Zhang⁵  Shanhu Bao⁵  Kun Wang⁵  Guoxin Chen⁵  Junhua Gao⁶ 

[1] Berma Technology (Ningbo) Group Co. LTD, Ningbo 315000, China;Corresponding author. Fax: [phone].;Institute of Inorganic Materials, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;Institute of Inorganic Materials, School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China;Laboratory of Advanced Nano Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China;

关键词: Complementary electrochromic devices;    Tungsten oxide;    Tin dioxide interfacial layer;    Charge-transfer;   

DOI  :  

来源: DOAJ

【 摘 要 】

The effect of interfacial layer (SnOx) on the performance of the complementary electrochromic devices (ECDs) was examined, revealing that the SnOx/WO3 bilayer cathodes could enhance the electrochromic performance, such as a superior long-term cycling stability over 10,000 cycles, a high coloration efficiency of 101.61 cm2 C−1 and a maximum transmittance modulation of 49.27%@633 nm. Moreover, compared with the single layer WO3, the SnOx/WO3 bilayer exhibited improved electrochemical activities and reaction kinetics. The probable explanation is that the introduced interfacial layer can boost the double injection of ions and electrons, balance the transport of ions and electrons, and protect the electrode from degradation by serving as a buffer layer during coloration/bleaching cycles. These results further provide a valuable insight for improving the electrochromic properties of the films instead of relying on conventional methods such as nanostructural or compositional control.

【 授权许可】

Unknown