| abstract |
The invention discloses the synthesis of an orange light-emitting perovskite quantum dot material. First, a N,N-dimethylformamide solution of lead bromide with a concentration of 0.15 mol/L is prepared, which is referred to as solution A In solution A, add ethylamine hydrogen hydrochloride to obtain solution B, wherein, the ratio of the amount of ethylamine hydrogen hydrochloride added and lead bromide substance is 3:4; Stir, and heat to 80°C for 1-2h, the obtained reaction stock solution is recorded as solution C; pipette an appropriate amount of solution C into the vigorously stirred acetone, immediately a yellow solid is precipitated, stir for 20-30min, The volume ratio of solution C to acetone is 1 to 2:20; the yellow solid is washed with acetone for 2 to 3 times, and dried in vacuum for 8 to 12 hours. The quantum dots synthesized by the invention do not emit light in natural environment, and emit orange light when dissolved in DMF, which can be used for information confidentiality. |