Publication date: 9th October 2020
Synthesis of lead halide nanocrystals within porous matrices provides a means to attain highly efficient light emitters in a protective and versatile environment. Furthermore, it allows spectral control over the luminescence, which can be finely tuned by means of quantum confinement effects, which arise when the nanocrystal size is of the order of the semiconductor exciton Bohr radius. Remarkably, this is mastered without the need of capping ligands, which ease both their integration in optoelectronic devices and the analysis of fundamental properties that depend on the direct exposure of the nanocrystal surface to its surroundings. In this talk, I will give an overview of the main features of these systems, focusing on aspects such as: the effect of the matrix on their radiative and non-radiative decay rates; their stability when subjected to different environments; their behavior as photoconductors, involving dot-to-dot charge transport, of great relevance if applications in electroluminescent devices are sought after; and the post-processing opportunities they offer to create novel color converting layers for LEDs.
We would like to acknowledge the Spanish Ministry of Economy and Competitiveness for funding under grant MAT2017-88584-R (AEI/FEDER,UE).
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