Preparation and application of stable perovskite CsPb0.93Zn0.07(Br/I)3@SiO2
In order to improve the stability of CsPbI3 and promote its application in the field of luminescence This arti-cle uses a two-step method to prepare CsPbI3 nanocrystals,and improves their luminescence efficiency and adjusts the product peak position by doping ZnBr2.CsPb0.93Zn0.07(Br/I)3@SiO2 with a luminescence efficiency of 49%and a lumines-cence peak position of 644 nm was obtained.This material has good stability and can maintain good luminescence perfor-mance even at high temperatures(400℃)and acidic environments.Apply it to the manufacturing of white light emitting diodes,which are combined with green fluorescent powder and blue light-emitting chips to form white light.The color co-ordinates are(0.33,0.33),and the color gamut reaches 125%of the color gamut(NTSC)defined by the National Televi-sion Standards Committee.The white light emitting diode we prepared exhibits excellent color stability,with almost no decrease in luminescence intensity after 72 h of illumination.The result of this study indicates that this material has enor-mous application potential in the field of display lighting.
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