Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/258086
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Title

Ligand-Free MAPbI3 Quantum Dot Solar Cells Based on Nanostructured Insulating Matrices

AuthorsRubino, Andrea; Calió, Laura; Calvo, Mauricio E. CSIC ORCID ; Míguez, Hernán CSIC ORCID
Issue Date2021
PublisherJohn Wiley & Sons
CitationSOLAR RRL 5 (2021)
AbstractThe stability, either chemical or thermal, and performance of colloidal quantum dot (CQD) devices are typically limited by the presence of surface-bonded organic ligands required to stabilize the nanocrystals. In addition, optimization of charge transport implies lengthy ligand exchange processing. Herein, evidence of efficient charge transport through a network of ligand-free perovskite quantum dots (PQDs) embedded in an insulating porous matrix made of monodisperse SiO nanoparticles is shown. Methylammonium lead iodide (CHNHPbI or MAPbI) QDs are prepared in situ by infiltration of precursors within the matrix pores, which act both as nanoreactors for the synthetic reaction and as supporting scaffolds, hence reducing the number of synthetic and postprocessing steps usually required in CQD solar cells. Above a certain nanocrystal load, charge percolation is reached and dot-to-dot transport achieved without compromising quantum confinement effects. Solar cells based on MAPbI QDs prepared in this way present a 9.3% efficiency, the highest reported for a scaffold-supported PQD solar cell, and significantly improved stability under solar illumination with respect to their bulk counterparts. Therefore, adequately designed networks of ligand-free PQDs can be used as both light harvesters and photocarrier conductors, in an alternative configuration to that used in previously developed QD solar cells.
Publisher version (URL)http://dx.doi.org/10.1002/solr.202100204
URIhttp://hdl.handle.net/10261/258086
DOI10.1002/solr.202100204
Identifiersdoi: 10.1002/solr.202100204
issn: 2367-198X
Appears in Collections:(ICMS) Artículos




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