Publication date: 15th December 2025
The utilization of a mesoporous material with a narrow pore size distribution constitutes an alternative method to the synthesis of ABX3 quantum dots (QD) due to the ease of processing and the excellent crystallinity and optical properties of the nanocrystals obtained. [1] The ligand-free QDs also possess a pristine surface, which renders them suitable for different functionalization strategies and reaction inside the pores.[2] In this study, we present a pre- and a post-functionalization approach that allowed us to developed light emitting application devices. First, we have synthesized FAPbBr3 QDs within the pore network of high optical quality SiO2 porous films, with the objective of obtaining high optical quality films with strong emission.[3] Subsequent to this, a post-functionalization with PMMA was performed, allowing emitting films with ultrapure colour and PLQY as high as 89% to be obtained. This system was employed for the integration of the components into colour conversion devices. On the other hand, the development of a light-emitting device necessitates an efficient charge transport by percolation through the QD network. In this instance, a pre-functionalization approach was employed, utilizing a combination of linear and branched amines in conjunction with crown ether.[4] This additive approach contributes to a substantial enhancement in device performance, leading to high luminance exceeding and a significant improvement in operational stability.
This project has received funding from the Spanish Ministry of Science and Innovation under grant PID2023-149344OB-100 funded by MCIN/AEI/10.13039/501100011033 and FEDER/UE and Junta de Andalucía under grant DGP_PIDI_2024_00821
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