A kind of multi-layer electrochromic thin film and preparation method thereof
An electrochromic and thin film technology, applied in the coating and other directions, can solve the problems such as the limited range of nanocrystal size adjustment, the difference in crystallization temperature, and the influence of electrochromic performance nanocrystal size.
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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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