SnO2 cluster colloid, SnO2 cluster electron transport layer, preparation method of SnO2 cluster colloid, preparation method of SnO2 cluster electron transport layer, and application of SnO2 cluster electron transport layer in perovskite solar cell
An electron transport layer, solar cell technology, applied in semiconductor/solid-state device manufacturing, circuits, photovoltaic power generation, etc., can solve the problems of easy aggregation, unfavorable photo-generated holes, poor controllability, etc., achieve fine and uniform particles, and widely used Prospect, excellent crystallinity effect
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Embodiment 1
[0062] 1) SnO 2 Preparation of cluster colloid solutions.
[0063] Take 5 mg of iodine and 400 μL of acetone, dissolve them in 50 mL of absolute ethanol, and mix well to obtain a yellow and clear ethanol mixed solution. In the ethanol mixed solution, the concentration of iodine is 0.396 mmol / L; take 30 μL of SnBr 4 In a sealed sample bottle, and inject 10mL of ethanol mixed solution therein, stir for 15min to make it mix uniformly, the SnBr 4 The molar volume ratio of the mixed solution with ethanol is 22.3:1mmol / L to obtain SnBr 4 Ethanol solution; after cooling to 0-15°C with an ice-water bath, add to SnBr under stirring conditions 4 Add 400 μL deionized water dropwise to the ethanol solution, stir for 12 h, and obtain clear and transparent SnO 2 Cluster colloid solution. Transmission electron microscopy showed (as figure 2 shown), the prepared SnO 2 The particles are clusters with a diameter of ~1.5nm, well dispersed without aggregation. Dynamic light scattering tes...
Embodiment 2
[0077] 1) SnO 2 Preparation of cluster colloid solutions.
[0078] Take 50mg (4mmol / L) of iodine and 1500μL of acetone, dissolve them in 50mL of absolute ethanol, and mix well to obtain a yellow and clear ethanol mixed solution; take 137μL of SnBr 4 (100mmol / L) with a sealed sample bottle, and inject 10mL of ethanol mixed solution into it, stir for 15min to make it mix uniformly, and obtain SnBr 4 ethanol solution; after cooling to 0-15°C with an ice-water bath, the SnBr 4 Add 1000 μL deionized water dropwise to the ethanol solution and stir for 24 h to obtain clear and transparent SnO 2 Cluster colloid solution. Transmission electron microscopy showed that the as-prepared SnO 2 Particles are clusters with a diameter of ~3.5nm, well dispersed and no aggregation, please refer to figure 2 shown.
[0079] 2) Cleaning of conductive glass. Same as embodiment 1, the difference is that FTO conductive glass is used in this embodiment.
[0080] 3) SnO 2 Preparation of electro...
Embodiment 3
[0086] 1) SnO 2 Preparation of cluster colloid solutions. Take 1.25mg (0.1mmol / L) of iodine and 100μL of acetone, dissolve in 50mL of absolute ethanol, and mix well to obtain a yellow and clear ethanol mixed solution; take 6.6μL of SnBr 4 (5mmol / L) in a sealed sample bottle, and inject 10mL of ethanol mixed solution therein, stir for 15min to make it mix uniformly, and obtain SnBr 4 ethanol solution; after cooling to 0-15°C with an ice-water bath, the SnBr 4 50 μL of deionized water was added dropwise to the ethanol solution and stirred for 2 h to obtain clear and transparent SnO 2 Cluster colloid solution. Transmission electron microscopy showed that the as-prepared SnO 2 The particles are clusters with a diameter of ~1.2nm, well dispersed without aggregation.
[0087] 2) Cleaning of ITO conductive glass. With embodiment 1.
[0088] 3) SnO 2 Preparation of electron transport layer. Same as Example 1, the difference is that the annealing temperature is 100° C., and th...
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