[institut] Reminder: Center for Solid State Physics and New Materials Seminar

[ninan at ipb.ac.rs]

Reminder:

Dear colleagues,
We are pleased to invite you to a seminar organized by the CSSPNM within the HIP-2D-QM project, which will be held on Wednesday, May 13, 2026, at 12:00 in the “Dragan Popović” lecture hall at the Institute of Physics Belgrade.
The seminar, entitled Structural Heterogeneity in Lead Halide Perovskites across Spatial and Temporal Length Scales, will be presented by Dr Milos Dubajic from the Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge CB3 0AS, United Kingdom, E-mail: milos.dubajic at hotmail.com<mailto:milos.dubajic at hotmail.com>

Abstract:
Halide perovskites are a class of semiconductors that have rapidly emerged as one of the most promising materials for next-generation optoelectronic devices, including solar cells, light-emitting diodes, and photodetectors. Their unique combination of high efficiency, tunable bandgap, and low-cost solution processability has placed them at the forefront of materials research, yet the microscopic origin of their remarkable properties remains poorly understood.
In this talk, I will present our recent results and insights into the factors governing structure–property relationships in 3D bulk halide perovskites. We argue that the origin of their macroscopic properties lies in structural dynamics, in particular correlated octahedral tilts that give rise to fluctuating nanodomains. I will show how different chemical compositions at the A and X sites modify their local structure and affect these tilting correlations, and I will propose alternative strategies to control them.
I will also present our recently developed 4D time-resolved hyperspectral PL imaging, a technique that provides simultaneous temporal and spectral resolution at the diffraction limit. This allows us to identify charge transfer from band edges to sub-gap states in regions under tensile strain, providing a unified link between local structural fluctuations, nanoscale strain and macroscopic properties.

Poštovane koleginice i kolege,
Sa zadovoljstvom vas pozivamo na seminar koji organizuje CSSPNM u okviru projekta HIP-2D-QM, a koji će biti održan u sredu, 13. maja 2026. godine, sa početkom u 12 časova, u sali „Dragan Popović“ Instituta za fiziku u Beogradu.
Predavanje pod nazivom „Strukturna heterogenost u halidnim perovskitima na različitim prostornim i vremenskim skalama“ održaće dr Miloš Dubajić sa Departmana za hemijsko inženjerstvo i biotehnologiju Univerziteta u Kembridžu (University of Cambridge), Kembridž CB3 0AS, Ujedinjeno Kraljevstvo. E-mail: milos.dubajic at hotmail.com<mailto:milos.dubajic at hotmail.com>
Sažetak:
Halidni perovskiti su klasa poluprovodnika koja se brzo nametnula kao jedan od najperspektivnijih materijala za optoelektronske uređaje nove generacije, uključujući solarne ćelije, LED i fotodetektore. Njihova jedinstvena kombinacija visoke efikasnosti, podesivog energetskog procepa i jeftine obrade iz rastvora postavila ih je u sam vrh istraživanja materijala, a mikroskopsko poreklo njihovih izuzetnih svojstava i dalje nije u potpunosti razjašnjeno.
U ovom predavanju predstaviću naše nedavne rezultate i uvide u faktore koji upravljaju odnosima između strukture i svojstava u 3D  halidnim perovskitima. Tvrdimo da poreklo njihovih makroskopskih svojstava leži u strukturnoj dinamici, posebno u korelisanim rotacijama oktaedara koja dovode do fluktuirajućih nanodomena. Pokazaću kako različiti hemijski sastavi na A i X položajima modifikuju njihovu lokalnu strukturu i utiču na ove korelacije i predložiću alternativne strategije za njihovu kontrolu.
Takođe ću predstaviti novu tehniku 4D temporalne i hiperspektralne  mikroskopske fotoluminescencije, tehniku koja istovremeno pruža vremensku i spektralnu rezoluciju na granici difrakcije. Ovo nam omogućava da identifikujemo transfer elektrona sa ivica zona u stanja unutar procepa u oblastima pod pod dejstvom tenzilne deformacije, čime uspostavljamo jedinstvenu vezu između lokalnih strukturnih fluktuacija, deformacija na nanoskali i makroskopskih svojstava.

Kind regards,
Srdačan pozdrav,
Nina Novaković
Center for Solid State Physics and New Materials
Institute of Physics Belgrade

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.ipb.ac.rs/pipermail/institut/attachments/20260512/65112cd7/attachment.htm>