Ligand-free perovskite quantum dots embedded in porous matrices: synthesis, properties and optoelectronic devices
Hernán Míguez a
a Instituto de Ciencia de Materiales de Sevilla (Consejo Superior de Investigaciones Científicas-Universidad de Sevilla),C/Américo Vespucio 49, 41092 Sevilla, España
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV22)
València, Spain, 2022 May 19th - 25th
Organizers: Pablo Docampo, Eva Unger and Elizabeth Gibson
Invited Speaker Session, Hernán Míguez, presentation 301
Publication date: 20th April 2022

Ligand-free lead halide perovskite nanocrystals displaying quantum confinement effects (i.e., quantum dots or QDs) can be achieved by in situ preparation and processing within scaffolds in which a fine control over the pore size distribution has been achieved.[1] In this talk, the synthetic procedures to attain such ligand free QDs, as well as their main photophysical and optoelectronic properties 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.


Tipo de presentación: Oral (Invited Speaker)

Financial support of the Spanish Ministry of Science and Innovation under grant PID2020-116593RB-I00 funded by MCIN/AEI/10.13039/501100011033 and of Junta de Andalucía under grant P18-RT-2291 (FEDER/UE) is gratefully acknowledged.

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