Tungsten oxide–cellulose nanocrystal composite films for electrochromic applications

Stefan Stoenescu, Simona Badilescu, Tanu Sharma, Ralf Brüning, Vo-Van Truong
2016 Optical Engineering: The Journal of SPIE  
Composite films of tungsten oxide and CNCs are prepared through a sol-gel method and their electrochromic (EC) properties investigated. After mixing CNC gel into a tungsten oxide precursor solution, indium-tinoxide-coated glass substrates are dipped into the composite solution and subsequently annealed at 170°C. The composite films consisted of CNCs dispersed in the tungsten oxide matrix. The resulting nanocomposite was found to be amorphous, exhibiting a high transmission modulation and very
more » ... od cycling stability. After having tested a range of compositions, a film of WO 3 with 10% CNC was found to be the most uniform and showed good EC performance. These results bode well for further work on CNC-EC composites for specific applications, especially when used on flexible substrates.
doi:10.1117/1.oe.55.12.127102 fatcat:cimhm5efsrebboqhiei6et6yja