Quantum dot-rare earth long afterglow composite luminescent material as well as preparation method and application thereof
A technology of long-lasting luminescence and luminescent materials, applied in luminescent materials, chemical instruments and methods, etc., can solve problems such as inability to achieve narrow-band emission and limiting the freedom of luminescence regulation
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preparation example 1
[0049] Preparation Example 1 CsPbCl 3 Preparation of perovskite quantum dots
[0050] Weigh 0.5mmol lead acetate and 0.1mmol cesium carbonate, then add 1mL oleic acid, 1mL oleylamine, 1mL tri-n-octylphosphine and 10mL octadecene, heat to 120°C with nitrogen gas and keep it warm for 10 minutes to form a transparent solution A, then Raise the temperature to 180°C; quickly inject 124 μL of hydrochloric acid into solution A, keep warm for 10 seconds, and quickly cool it in an ice bath (cooling rate is about 10-15°C / second) to room temperature; first centrifuge and then use 10mL cyclohexane and 10mL acetone Wash once, and disperse the precipitate in 30 mL cyclohexane to obtain CsPbCl 3 Perovskite quantum dots.
preparation example 2
[0051] Preparation Example 2 CsPbCl 1.5 Br 1.5 Preparation of perovskite quantum dots
[0052] Weigh 0.5mmol lead acetate and 0.05mmol cesium carbonate, then add 0.5mL oleic acid, 0.5mL oleylamine and 6mL octadecene, heat to 120°C with nitrogen gas and keep it warm for 30 minutes to form a transparent solution A, then heat up to 190°C; Quickly inject 62 μL of hydrochloric acid and 87 μL of hydrogen bromide into solution A, keep warm for 5 seconds, and quickly cool to room temperature in an ice-water bath; centrifuge and then wash once with 5 mL of cyclohexane and 5 mL of acetone, and disperse the precipitate in a 30 mL ring In hexane, CsPbCl is obtained 1.5 Br 1.5 Perovskite quantum dots.
preparation example 3
[0053] Preparation Example 3 CsPbBr 3 Preparation of perovskite quantum dots
[0054] Weigh 0.5mmol lead acetate and 0.08mmol cesium carbonate, then add 1.5mL oleic acid, 1.5mL oleylamine and 8mL octadecene, heat to 120°C with nitrogen gas and keep it warm for 30 minutes to form a transparent solution A, then heat up to 170°C; Quickly inject 173 μL of hydrogen bromide into solution A, keep warm for 10 seconds, and quickly cool in an ice bath (cooling rate is about 10-15°C / second) to room temperature; first centrifuge and then wash once with 5mL cyclohexane and 5mL acetone , and the precipitate was dispersed in 30 mL cyclohexane to give C s PbBr 3 Perovskite quantum dots.
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