Publication date: 21st July 2025
Synthesizing perovskite quantum dots (PQDs) within nanoporous matrices offers a promising alternative to traditional colloidal methods [1]. These matrices feature a controllable network of voids, acting as nanoreactors in which precursor solutions can be infiltrated. Further thermal or chemical treatments convert them into nanocrystals. This confinement enables precise control over PQD dimensions, size distribution, and crystallinity without requiring stabilizing ligands.
This talk highlights the method's potential to enhance PQD stability and functionality and to study fundamental properties of both individual QDs and QD networks. Key advantages include: (i) Stabilization of metastable phases, like the α-phase of CsPbI3 even at room temperature [2]; (ii) Control over the environmental responsiveness [3]; (iii) High optical performance, with quantum yields exceeding 85% for specific compositions such as FAPbBr₃ [4]; (iv) Versatility for low-dimensional Structures, as the approach extends to fabricating low-dimensional perovskite structures, enabling remarkable blue photoluminescence with quantum yields surpassing 40% [5] or the formation of exciton-polaritons; Efficient charge transport within the embedded QD network, which depends critically on achieving PQD interconnectivity to enable dot-to-dot charge transfer, central for successful device operation [6].
Funding from grant PID2020-116593RB-I00 and grant PID2023--149344OB-I00, funded by MCIN/AEI/10.13039/501100011033, is acknowledged.
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