Surface modulation of solution processed organolead halide perovskite quantum dots to large nanocrystals integrated with silica gel G

Abstract

We demonstrated a facile method to grow organometal halide perovskite quantum dots in a solid silica matrix. The photoluminescence measurements of the MAPbBr3 quantum dots and corresponding large particles show a shift from blue to green emission with morphological changes. The nanocrystals impregnated on the silica matrix improve the stability and may be useful as functional materials in all solid state light emitting devices.

Charge transfer between lead halide perovskite nanocrystals and single-walled carbon nanotubes

“…2,[13][14][15] Besides, the low-cost solution synthesis of these perovskite nanocrystals (PNCs) results in intense uorescence and nearly unity quantum yield. 2,[16][17][18][19][20][21] On the other hand, the strong connement of carbon nanotubes (CNTs) to one dimension has also attracted the attention of the scientic community in the areas of charge transport, eld emission, gas storage, photodetectors and other photovoltaic applications. 22,23 Advancement in this research eld has been probed through various photo-responsive CNT-based nanocomposites with organic uorophores and inorganic moieties including conventional quantum dots (e.g., CdSe/ZnS).…”

Essential Amino Acid–Enabled Lead Bromide Perovskite Nanocrystals with High Stability

“…Thus, a different strategy for the installation of nontoxic ligands onto perovskite nanocrystals surface of any arbitrary size and shape is needed. Colloidally stable MAPbX 3 perovskite nanocrystals with well‐defined optical properties have been reported since 2014 . Since then, colloidal MAPbX 3 quantum dots with long aliphatic ligand have been routinely prepared with high photoluminescence quantum yield .…”

Aqueous Precursor Induced Morphological Change and Improved Water Stability of CsPbBr3 Nanocrystals

“…Therefore, the stability of perovskites is a big concern for their long‐term application. Various research groups have applied a lot of approaches to enhance the stability of perovskites such as replacing organic cations with inorganic cations, modification of the ligands, synthesizing nanocomposites by using polymers, and coating with silica …”

“…Various research groups have applied al ot of approaches to enhance the stability of perovskites such as replacing organic cations with inorganic cations,m odification of the ligands, synthesizing nanocomposites by using polymers, and coatingwith silica. [15][16][17][18][19][20] Water-stable perovskites can be developedi na cidic and basic mediab yu sing aL ewisb ase vapord iffusion (LBVD) method. [21] Aqueous synthesis of CsPbBr 3 /Cs 4 PbBr 6 nanocomposites by adding fluorocarbon agents and encapsulating in BaSO 4 can increaset heir water stability.…”