Mechanochemical Route to High-Entropy Three-Dimensional Halide Perovskites High-entropy alloying has been demonstrated as a powerful approach to obtaining materials with exceptional structural and functional properties. The presence of several atomic species in the same crystallographic site alters short-range order compared to nonalloyed phases and results in different mechanical, chemical, and electronic behavior with emergent features. While the synthesis of high-entropy alloys (HEAs) is established in metallurgy, their formation as halide perovskites has been so far limited by synthetic bottlenecks, including different solubilities of the binary salt precursors and the complexity of crystallization pathways in solution. Herein, we report a solvent-free mechanochemical synthesis route for high-entropy double perovskites, yielding simultaneous near-stoichiometric alloying at two and three crystal sublattices. Detailed structural characterization reveals the atomic mechanisms involved in the formation of the HEAs through asymmetric ion-exchange rates from parent nonalloyed perovskites, as well as the formation of inorganic layered nanoheterostructures. Strong nonlinear behavior is observed in the optical properties (bandgap bowing), leading to full visible-range light absorption for the chloride perovskites. Theoretical calculations at the density functional theory provide a framework for the process, shedding light into the electronic structure of the complex alloys. As a proof of concept, the alloys are implemented in a standard electrochemical cell fitted with a quartz window for photoelectrochemical oxygen evolution testing, showing a clear photocatalytic response.

New #MiMpaper! In collaboration with colleagues from @iitalk.bsky.social and @icmoluv.bsky.social, which always makes things better 😊. #HighEntropy #Perovskites #Mechanochemistry #MULTIMAT
Mechanochemical Route to High-Entropy Three-Dimensional Halide Perovskites pubs.acs.org/doi/10.1021/...

Many good reasons to celebrate today: Spring, Eid, comeback of part of the group from France, farewell to part of the group leaving for Japan, recently-accepted paper... but mostly celebrating to be here just another day enjoying science together. #GroupPicture #multimat

This week, Katherine Jejen and @ghita03.bsky.social are participating in the #EUT+ week at UTT (Troyes), presenting the work we do at @multimat.bsky.social as members of #EUTINN. ¡Good european networking! #UPCT #MULTIMAT

Jajajaja ¡ Es #MiM ! Multifunctional inorganic Materials o Materiales inorgánicos Multifuncionales... la simetría es perfecta, no dirás que no 😜 Gracias, tú si que eres bonico! 😘

PD: También vale #MULTIMAT pero ahí ya la simetría... 🤷‍♂️

¿Quién dijo que a la #UPCT no podía venir una postdoc india de Japón con un proyecto europeo ( #MSCA )? En el grupo #MULTIMAT no tenemos complejos y jugamos con las mejores 😜

At #MULTIMAT we have the tradition of getting one big toy every summer 😁 Looking forward to do some #thermoelectrics measurements next year!

Primera publicación del grupo #MULTIMAT @multimat.bsky.social ! Enhorabuena Katherine y todas las coautoras, incluidas colegas y amigas del @icmoluv.bsky.social @icmol.bsky.social.
#perovskites #nanocrystals #photodetectors.
Por supuesto también en @perovspain.bsky.social perovspain.org.

Mis años de #RyC no habrán sido los más productivos en cuanto a papers pero tampoco he estado de vacaciones eh... que montar un grupo nuevo en una universidad nueva todo más o menos "from scratch" no es precisamente bufar i fer ampolles 😄 ¡Deseadnos suerte! #MULTIMAT #MiM 👇

Multifunctional Inorganic Materials

Hello World!
We're a newly-created academic research group working on different materials for renewable energy applications. Check our website at www.multimat.org
#MULTIMAT #MiM

Corriente trifásica ✅️
Líneas de N2 y O2 ✅️

Poco a poco esto va pareciendo un laboratorio en condiciones 🙂

More to come soon... stay tuned 😉 #MULTIMAT #MiM