Composite layer electrochromism film and preparation method thereof
An electrochromic and thin-film technology, applied in coatings and other directions, can solve problems such as crystallization temperature difference, limited range of nanocrystal size adjustment, and influence of nanocrystal size on electrochromic performance.
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[0029] The present invention also provides a method for preparing a multilayer electrochromic film, comprising the following steps:
[0030] Step 1, prepare TCO sol with a concentration of 0.2-0.6 mol / L and WO sol with a concentration of 0.10-0.17 mol / L respectively 3 Sol;
[0031] In step 1, the preparation method of TCO sol is: after mixing metal inorganic salt for TCO with acetylacetone, stir at 50-60°C for 1 hour; then add acetic anhydride and continue stirring at 50-60°C for 1 hour; then introduce doping atoms, and add Dehydrated ethanol, mixed and stirred at room temperature for 30 minutes; then added polyethylene glycol 600, stirred at room temperature for 30 minutes, and stood still for 12 hours to obtain TCO sol; wherein, metal inorganic salts, doping atoms, acetylacetone, acetic anhydride, The molar ratio of absolute ethanol and polyethylene glycol 600 is: 1:0.05~0.15:5.58~9.32:0.8~2.5:58~75:0.15~0.50;
[0032] WO in step 1 3 The preparation method of the sol is: ...
Embodiment 1
[0045] 5g of indium nitrate In(NO 3 ) 3 4.5H 2 O was dissolved in 7.5 mL of acetylacetone AcAcH, stirred at 50°C for 1 h; then 2 mL of acetic anhydride was added and stirred at 50°C for 1 h; next, 0.46 g of tin tetrachloride SnCl was added 4 ·5H 2 O and 45 mL of absolute ethanol were mixed and stirred at room temperature for 30 min; then 2 mL of polyethylene glycol 600 was added, stirred at room temperature for 30 min, and left to stand in a dry environment for 12 h to obtain an ITO sol.
[0046] 2.5g tungsten chloride WCl 6 Dissolve in a mixed solution of 20mL absolute ethanol and 20mL absolute methanol, control the air humidity to be less than 30%, and stir magnetically at room temperature for 1 hour to obtain dark blue WO 3 Sol, stand for 12h for later use.
[0047] Using dipping and pulling technology, pull the ITO gel film on the FTO conductive glass, control the dipping time to 1s, pull the speed to 0.3cm / s, and the air humidity is not more than 40%; each layer of I...
Embodiment 2
[0051] 5g of indium nitrate In(NO 3 ) 3 4.5H 2 O was dissolved in 10 mL of acetylacetone AcAcH, stirred at 55°C for 1 h; then 2 mL of acetic anhydride was added and stirred at 55°C for 1 h; next, 0.69 g of tin tetrachloride SnCl was added 4 ·5H 2 O and 50 mL of absolute ethanol were mixed and stirred at room temperature for 30 min; then 3 mL of polyethylene glycol 600 was added, stirred at room temperature for 30 min, and left to stand in a dry environment for 12 h to obtain an ITO sol.
[0052] 2.5g tungsten chloride WCl 6 Dissolve in a mixed solution of 25mL of absolute ethanol and 25mL of absolute methanol, control the air humidity to less than 30%, and stir magnetically at room temperature for 1 hour to obtain dark blue WO 3 Sol, stand for 12h for later use.
[0053] Using dipping and pulling technology, pull the ITO gel film on the FTO conductive glass, control the dipping time to 5s, pull the speed to 0.6cm / s, and the air humidity is not more than 40%; each layer of...
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