Journal
RSC ADVANCES
Volume 5, Issue 34, Pages 26923-26931Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra00208g
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Funding
- DAE-BRNS Mumbai [2012/34/51/BRNS/2036]
- National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2009-0094055]
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We explore a novel method to synthesize pebble-like nanocrystalline WO3 thin films for the first time by thermal decomposition of a multilayer Langmuir-Blodgett film of an octadecylamine-tungsten complex. The resulting film was thoroughly characterized by various characterization techniques. The electrochromic performance was evaluated in Li+ as a charge-balancing ion. The WO3 thin film displays a state-of-the-art performance with respect to optical modulation of 25.94% at lambda(630) nm with a very rapid coloration and bleaching time of 3.57 s and 3.14 s, respectively and a high coloration efficiency of 71.26 cm(2) C-1. The excellent electrochromic performance can be attributed to the high size uniformity of WO3 nanoparticles, whose crystalline nature offer more active sites for Li+ diffusion and control the diffusion path length. Thus, the Langmuir-Blodgett WO3 film contributes to high energy conversion devices.
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