Patent ID: 11905444
Assignee: THE UNIVERSITY OF QUEENSLAND
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B  H  Y | IPC B  C  H

Claim 0:
1. A process for preparing hybrid perovskite quantum dots, the process comprising the steps of:
a) preparing first quantum dots having a first composition and a first surface ligand at a first target amount;
b) preparing second quantum dots having a second composition and a second surface ligand at a second target amount; and,
c) preparing a solution comprising a ratio of the first and second quantum dots so that the first and second quantum dots undergo ligand-mediated cation exchange to form hybrid quantum dots having a composition determined by the first and second compositions and the ratio
wherein the first composition and the second composition independently comprise a compound of formula I:

AMX3  (I)

wherein:
A is an alkali metal cation, CH3NH3+ or NH2CH═NH2+;
M is a metal cation; and
each X is independently a halide;
wherein the second composition is a composition other than the first composition;
wherein a molar ratio of a compound of formula I in the first quantum dots to the first surface ligand at the first target amount is in the range of from 1:2 to 1:25;
and wherein a molar ratio of a compound of formula I in the second quantum dots to the second surface ligand at the second target amount is in the range of from 1:3 to 1:30.