期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 4, 期 35, 页码 8284-8290出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6tc02177h
关键词
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资金
- 863 Program [2013AA032501]
- 973 Program [2014CB932104]
- National Natural Science Foundation of China (NSFC)
- Beijing Nova program
Electrochromic films have shown great application prospects in electronic display and information storage. In this work, we report the fabrication of electrochromic ultrathin films (UTFs) by layer-by-layer (LBL) assembly of layered double hydroxide (LDH) nanosheets with poly(3,4-ethylene-dioxythiophene)-poly(styrene sulphonate) (PEDOT: PSS). UV-vis absorption spectra illustrate the uniform and regular growth of the UTFs. The X-ray diffraction results indicate that the (PEDOT: PSS/LDH)(n) UTFs possess long-range ordered stacking in the normal direction of the substrate, with PEDOT: PSS accommodated between the LDH nanosheets. SEM and AFM images demonstrate a continuous smooth surface of the (PEDOT: PSS/LDH) n UTFs without aggregation. The (PEDOT: PSS/LDH)(n) UTFs exhibit an improved ion transfer kinetics, owing to the high dispersion of PEDOT: PSS and the presence of an ordered superlattice architecture. This leads to significantly enhanced electrochromic performance, including ultrafast switching speed (0.27/0.18 s for coloring/bleaching response), high optical contrast (Delta T = 32%, at 650 nm) and satisfactory coloration efficiency (159 cm(2) C-1). Therefore, this work provides a feasible method to construct high-performance electrochromic films, which are promising candidates for application in optical/optoelectronic devices.
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