RT journal article
T1 Intense and Stable Blue Light Emission From CsPbBr3/Cs4PbBr6 Heterostructures Embedded in Transparent Nanoporous Films
A1 Romero-Pérez, Carlos
A1 Fernández Delgado, Natalia
A1 Herrera Collado, Miriam
A1 Calvo, Mauricio E.
A1 Míguez, H.
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
K1 blue emission
K1 color conversion
K1 Cs4PbBr6
K1 CsPbBr3
K1 high quantum yield
K1 nanocrystals
K1 porous materials
AB Lead halide perovskite nanocrystals are attractive for light emitting devices both as electroluminescent and color-converting materials since they combine intense and narrow emissions with good charge injection and transport properties. However, while most perovskite nanocrystals shine at green and red wavelengths, the observation of intense and stable blue emission still remains a challenging target. In this work, a method is reported to attain intense and enduring blue emission (470–480 nm), with a photoluminescence quantum yield (PLQY) of 40%, originating from very small CsPbBr3 nanocrystals (diameter < 3 nm) formed by controllably exposing Cs4PbBr6 to humidity. This process is mediated by the void network of a mesoporous transparent scaffold in which the zero-dimensional Cs4PbBr6 lattice is embedded, which allows the fine control over water adsorption and condensation that determines the optimization of the synthetic procedure and, eventually, the nanocrystal size. The approach provides a means to attain highly efficient transparent and stable blue light-emitting films that complete the palette offered by perovskite nanocrystals for lighting and display applications.
PB John Wiley and Sons
SN 2195-1071
YR 2024
FD 2024
LK http://hdl.handle.net/10498/35794
UL http://hdl.handle.net/10498/35794
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 22-sep-2026