G
Georgian Nedelcu
Researcher at ETH Zurich
Publications - 23
Citations - 7003
Georgian Nedelcu is an academic researcher from ETH Zurich. The author has contributed to research in topics: Perovskite (structure) & Halide. The author has an hindex of 17, co-authored 20 publications receiving 5436 citations. Previous affiliations of Georgian Nedelcu include Swiss Federal Laboratories for Materials Science and Technology.
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Journal ArticleDOI
Fast Anion-Exchange in Highly Luminescent Nanocrystals of Cesium Lead Halide Perovskites (CsPbX3, X = Cl, Br, I)
Georgian Nedelcu,Loredana Protesescu,Loredana Protesescu,Sergii Yakunin,Sergii Yakunin,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Matthias J. Grotevent,Maksym V. Kovalenko,Maksym V. Kovalenko +9 more
TL;DR: This work reports fast, low-temperature, deliberately partial, or complete anion-exchange in highly luminescent semiconductor nanocrystals of cesium lead halide perovskites (CsPbX3, X = Cl, Br, I).
Journal ArticleDOI
Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites
Sergii Yakunin,Sergii Yakunin,Loredana Protesescu,Loredana Protesescu,Franziska Krieg,Franziska Krieg,Maryna I. Bodnarchuk,Maryna I. Bodnarchuk,Georgian Nedelcu,Georgian Nedelcu,Markus Humer,Gabriele De Luca,Manfred Fiebig,Wolfgang Heiss,Maksym V. Kovalenko,Maksym V. Kovalenko +15 more
TL;DR: Low-threshold amplified spontaneous emission and lasing from ∼10 nm monodisperse colloidal nanocrystals of caesium lead halide perovskites CsPbX3 are reported.
Journal ArticleDOI
Highly Dynamic Ligand Binding and Light Absorption Coefficient of Cesium Lead Bromide Perovskite Nanocrystals
Jonathan De Roo,Maria Ibáñez,Maria Ibáñez,Pieter Geiregat,Georgian Nedelcu,Willem Walravens,Jorick Maes,José C. Martins,Isabel Van Driessche,Maksym V. Kovalenko,Maksym V. Kovalenko,Zeger Hens +11 more
TL;DR: It is found that ligand binding to the NC surface is highly dynamic, and therefore, ligands are easily lost during the isolation and purification procedures, and when a small amount of both oleic acid and oleylamine is added, the NCs can be purified, maintaining optical, colloidal, and material integrity.
Journal ArticleDOI
Bright triplet excitons in caesium lead halide perovskites
Michael Becker,Michael Becker,Roman Vaxenburg,Georgian Nedelcu,Georgian Nedelcu,Peter C. Sercel,Andrew Shabaev,Michael J. Mehl,John G. Michopoulos,Samuel G. Lambrakos,Noam Bernstein,John L. Lyons,Thilo Stöferle,Rainer F. Mahrt,Maksym V. Kovalenko,Maksym V. Kovalenko,David J. Norris,Gabriele Rainò,Gabriele Rainò,Alexander L. Efros +19 more
TL;DR: In this article, it was shown that the lowest exciton in caesium lead halide perovskites (CsPbX_3, with X = Cl, Br or I) involves a highly emissive triplet state.
Journal ArticleDOI
Synthesis of Cesium Lead Halide Perovskite Nanocrystals in a Droplet-Based Microfluidic Platform: Fast Parametric Space Mapping
Ioannis Lignos,Stavros Stavrakis,Georgian Nedelcu,Loredana Protesescu,Andrew J. deMello,Maksym V. Kovalenko +5 more
TL;DR: The early-stage insight into the mechanism of nucleation of metal halide nanocrystals suggests similarities with multinary metal chalcogenide systems, albeit with much faster reaction kinetics in the case of halides, and it is shown that microfluidics-optimized synthesis parameters are also directly transferrable to the conventional flask-based reaction.