Photovoltaic material with thin-layer perovskite structure and preparation method for photovoltaic material
A technology of perovskite structure and photovoltaic materials, which is applied in the materials of organic semiconductor devices, photovoltaic power generation, manufacturing/processing of organic semiconductor devices, etc. High efficiency, good stability, and the effect of being beneficial to production
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Embodiment 1
[0053] Prepare dodecyltrimethylammonium bromide (DTAB) into a solution with a concentration of 36mmol / L using deionized water as a solvent, raise the temperature of the DTAB solution to 30°C, keep the temperature, and add to the DTAB under stirring Slowly add CH to the solution 3 NH 3 The γ-butyrolactone solution of I, CH in the solution 3 NH 3 The concentration of I was prepared to be 1.5mol / L, and after the dropwise addition was completed, PbI was quickly added dropwise to it 2 γ-butyrolactone solution, the solution of PbI 2 The concentration of the mixture was prepared to be 1.5mol / L. After the dropwise addition, continue to stir until the two are evenly mixed. After the mixture is heated to 70°C, the stirring is stopped, and it is left to stand for 5 minutes. After that, the temperature of the mixture is lowered at a cooling rate of 2°C / min. to 30°C, add sodium hydroxide to the mixed solution to adjust the pH value of the mixed solution to 10, then slowly stir the mixe...
Embodiment 2
[0055] Tetradecyltrimethylammonium bromide (TTAB) was prepared into a solution with a concentration of 8 mmol / L using deionized water as a solvent, and the temperature of the TTAB solution was raised to 35 ° C, and the temperature was maintained, and the TTAB solution was added to the TTAB under stirring. Slowly add CH to the solution 3 NH 3 Cl in γ-butyrolactone solution, CH in the solution 3 NH 3 The concentration of Cl is 1.2mol / L, after the dropwise addition, PbCl is quickly added dropwise to it 2 γ-butyrolactone solution, the solution of PbCl 2 The concentration of the solution is 1.2mol / L. After the dropwise addition, continue to stir until the two are evenly mixed, raise the temperature of the mixed solution to 80°C, stop stirring, let it stand for 7 minutes, and then use a cooling rate of 3°C / min to cool the mixed solution to 40°C, add potassium hydroxide to the mixed solution to adjust the pH value of the mixed solution to 12, then slowly stir the mixed solution f...
Embodiment 3
[0057] Cetyltrimethylammonium bromide (CTAB) was prepared into a solution with a concentration of 2.5mmol / L using deionized water as a solvent, the temperature of the TTAB solution was raised to 40°C, and the temperature was maintained, and the Slowly add CH to the CTAB solution 3 NH 3 DMF solution of Br, CH in the solution 3 NH 3 The concentration of Br was prepared to be 1.0mol / L, after the dropwise addition was completed, PbBr was quickly added dropwise to it 2 DMF solution, the solution of PbBr 2 The concentration of the mixture was prepared to be 1.0mol / L. After the dropwise addition, continue to stir until the two are evenly mixed. After the mixture is heated to 70°C, the stirring is stopped, and it is left to stand for 8 minutes. After that, the temperature of the mixture is lowered at a cooling rate of 5°C / min. to 40°C, add sodium hydroxide and sodium bicarbonate to the mixed solution to adjust the pH value of the mixed solution to 14, then slowly stir the mixed so...
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