Method for adjusting light-emitting wavelength of perovskite by using fluoride
A light-emitting wavelength, perovskite technology, applied in chemical instruments and methods, lead compounds, light-emitting materials, etc., can solve the problems of optical performance decline, unstable light-emitting color, etc., to achieve simple, effective and controllable methods, rich raw materials, and improved The effect of stability
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Embodiment 1
[0032] (1) Oleylamine iodine (OLA-HI): Add 20mL of oleylamine (OAm) and 2mL of hydrogen iodide (HI) into a 100mL three-necked flask respectively, then blow in nitrogen gas, heat to 120°C and keep it warm for 2h ; Cool to approximately 80°C, collect the solution into a closed syringe, and store in a 30 mL deoxygenated vial.
[0033] (2) 0.1mmol cesium carbonate (CsCO 3 ), 0.2mmol lead oxide (PbO), 10mL octadecene (ODE), 1mL oleic acid (OA) were added into a three-necked flask and stirred at 120°C for 30min to fully mix; the temperature was further raised to 180°C, and the injection step (1 1.5mL of OLA-HI synthesized in ), react for 10s, cool with cold water and control the temperature at 80°C for post-treatment;
[0034] (3) Add 1 mL of tetrabutylammonium fluoride (TBAF) to the synthesis solution in step (2) and stir for 15 min, let stand for 10 min, and then cool with cold water.
[0035] (4) Centrifuge the synthesized solution at 12000rpm for 5min, take the precipitate and...
Embodiment 2
[0037] (1) OLA-HI: Add 20 mL of OAm and 2 mL of HI into a 100 mL three-necked flask, respectively, then pass nitrogen gas, heat to 120° C. and keep it warm for 2 hours. Cool to approximately 80 °C, collect the solution into a closed syringe, and store in a 30 mL deoxygenated vial.
[0038] (2) 0.1mmol CsCO 3 , 0.2mmol PbO, 10mL ODE, and 1mL OA were added to a three-necked flask and stirred at 120°C for 30min to fully mix; the temperature was further raised to 180°C, and 1.5mL of OLA-HI synthesized in step (1) was injected into it, and reacted for 10s. Cold water cooling controls the temperature at 80°C for aftertreatment.
[0039] (3) Add 0.64 mmol of trifluoromethanesulfonic acid to the synthesis solution in step (2) and stir for 20 min, let stand for 15 min, and then cool with cold water.
[0040] (4) Centrifuge the synthesized solution at 12000rpm for 5min, take the precipitate and add it to toluene for purification and separation, then centrifuge at 8000rpm for 3min to g...
Embodiment 3
[0042] (1) OLA-HI: Add 20 mL of OAm and 2 mL of HI into a 100 mL three-necked flask, respectively, then pass nitrogen gas, heat to 120° C. and keep it warm for 2 hours. Cool to approximately 80 °C, collect the solution into a closed syringe, and store in a 30 mL deoxygenated vial.
[0043] (2) 0.1mmol CsCO 3 , 0.2mmol PbO, 10mL ODE, and 1mL OA were added to a three-necked flask and stirred at 120°C for 30min to fully mix; the temperature was further raised to 180°C, and 1.5mL of OLA-HI synthesized in step (1) was injected into it, and reacted for 10s. Cold water cooling controls the temperature at 80°C for aftertreatment.
[0044] (3) Add 0.64 mmol of difluoromethyl to the synthesis solution in step (2), stir for 10 min, let stand for 8 min, and then cool with cold water.
[0045] (4) Centrifuge the synthesized solution at 12000rpm for 5min, take the precipitate and add it to toluene for purification and separation, then centrifuge at 8000rpm for 3min to get the supernatant ...
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