公开(公告)号：US20180002354A1

公开(公告)日：2018-01-04

申请号：US15637385

申请日：2017-06-29

Applicant: NANYANG TECHNOLOGICAL UNIVERSITY

Inventor： Tze Chien SUM ,  Weiqiang CHEN ,  Subodh Gautam MHAISALKAR ,  Nripan MATHEWS ,  Sjoerd Antonius VELDHUIS ,  Saikat BHAUMIK

IPC: C07F7/24 ,  C07F7/08 ,  G01N21/64

CPC classification number: C07F7/24 ,  C01P2002/01 ,  C01P2002/34 ,  C01P2002/70 ,  C01P2002/84 ,  C07F7/0834 ,  G01N2021/6417

Abstract: Provided is a nanocrystal comprising a core comprised in a shell, wherein the core comprises a first material of a perovskite structure comprising a first organic cation not exceeding a molar weight of about 45 g/mol, a first divalent metal and a first counter anion, and, wherein the shell comprises a second material of a perovskite structure comprising a second organic cation having a molar weight between about 74 g/mol and about 187 g/mol, optionally the first organic cation, a second divalent metal and a second counter anion. Provided is further a matrix having the nanocrystal as defined above encapsulated therein. Provided is further a process for the synthesis of a nanocrystal comprising a core comprised in a shell, the process comprising a) preparing a precursor solution containing at least one divalent metal, a first organic cation not exceeding a molar weight of about 45 g/mol, a second organic cation having a molar weight between about 74 g/mol and about 187 g/mol, and at least one counter anion in a polar aprotic solvent; and b) subjecting the precursor solution to a non-polar solvent to form the nanocrystal.