Proceedings of nanoGe Spring Meeting 2022 (NSM22)
DOI: https://doi.org/10.29363/nanoge.nsm.2022.230
Publication date: 7th February 2022
Optical quality films of lead halide perovskite nanocrystals displaying quantum confinement effects can be achieved by in situ preparation and processing within the void space of insulating porous matrices.[1] In this talk, the main photophysical properties of embedded quantum dots will be reviewed, with emphasis on the possibilities that the absence of organic ligands offer to achieve control over the optical and charge transport properties. Evidence of efficient dot-to-dot transport,[2] fast photoactivation,[3] high photoluminescence quantum yield (>85%) and enhanced durability,[4] with respect to their bulk counterparts, will be provided for different films made of MAPbI3, MAPbBr3, CsPbI3 and FAPbBr3 quantum dots embedded in porous matrices. Also, the absence of ligands implies an excellent opportunity to analyse fundamental interactions, such electron-phonon coupling[5] and the response to the environment,[6] without the interference of organic capping layers. Overall, these results demonstrate that adequately designed networks of ligand-free perovskite quantum dots can be used as both light harvesters and photocarrier conductors, in an alternative configuration to those employed in previously developed QD optoelectronic devices.
Financial support of the Spanish Ministry of Science and Innovation under grant PID2020-116593RB-I00 funded by MCIN/AEI/10.13039/501100011033 is gratefully acknowledged.
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