91 citations · 508 across the 26 of their papers we have counts for
27 papers
Decoding Thermal Stability: In situ Insights into Phase Controlled Phosphine-free Colloidal Bi-Te Nanosheets
Fagui He, Kevin Oldenburg, Rostyslav Lesyuk +1
Bismuth telluride (Bi2Te3) is a prototypical V-VI semiconductor of interest for both thermoelectric and topological applications; however, phase-selective synthesis and thermal sta…
Unlocking klockmannite: formation of colloidal quasi-2D CuSe nanocrystals and photo-physical properties arising from crystal anisotropy
Urvi Parekh, Nadiia Didukh, Samira Dabelstein +8
Copper selenide is an exceptional quasi-layered monolithic material that exhibits both semiconducting and metallic properties in adjacent visible and near-infrared (NIR) spectral r…
Tunable Colloidal Synthesis Enabling μ-ARPES on Individual Two-dimensional Bismuth Nanocrystals
Fagui He, Yan Yan Grisan Qiu, Simone Mearini +4
Two-dimensional bismuth (Bi) is a promising platform for quantum and energy technologies due to strong spin-orbit coupling, high thermoelectric efficiency, and magnetoresistance. H…
Colloidal quasi-2D Cs2AgBiBr6 double perovskite nanosheets: synthesis and application as high-performance photodetectors
Pannan I. Kyesmen, Eugen Klein, Brindhu Malani S +2
The search for non-toxic lead-free halide perovskites that can compete with the lead-based counterparts has led to the emergence of double perovskites as potential candidates. Amon…
Boosting Photodetection via Plasmonic Coupling in Quasi-2D Mixed-n Ruddlesden-Popper Perovskite Nanostripes
Brindhu Malani S, Eugen Klein, Ronja Maria Piehler +2
Quasi-2D metal halide perovskites have emerged as a promising material for photodetection due to excellent optoelectronic properties, simple synthesis, and robust stability. Albeit…
Chasing Charge Carriers: Diffusion Dynamics in Mixed-n Quasi-Two-Dimensional Colloidal MAPbBr3 Perovskites
Ronja Maria Piehler, Eugen Klein, Francisco M. Gomez-Campos +3
In optoelectronic applications, metal halide perovskites (MHPs) are compelling materials because of their highly tuneable and intensely competitive optical properties. Colloidal sy…
Towards high-performance photodetectors based on quasi-2D Ruddlesden-Popper mixed-n perovskite nanomaterials
Brindhu Malani S, Eugen Klein, Rostyslav Lesyuk +1
The excellent optoelectronic properties, straightforward synthesis, and robust material stability of quasi-2D metal halide perovskites have made them a hot research topic for optoe…
Colloidal quasi-2D Methylammonium Lead Bromide Perovskite Nanostructures with Tunable Shape and High Chemical Stability
Eugen Klein, Rostyslav Lesyuk, Christian Klinke
Control over the lateral dimensions of colloidal nanostructures is a complex task which requires a deep understanding of the formation mechanism and reactivity in the corresponding…
Tailoring Charge Donor-Acceptor Interaction in CsPbBr3 Perovskite Nanocrystals through Ligand Exchange
Syed Abdul Basit Shah, Sushant Ghimire, Rostyslav Lesyuk +3
The surface ligands in colloidal metal halide perovskites influence not only their intrinsic optoelectronic properties but also their interaction with other materials and molecules…
Understanding the Optoelectronic Processes in Colloidal 2D Multi-Layered MAPbBr3 Perovskite Nanosheets: Funneling, Recombination and Self-Trapped Excitons
André Niebur, Eugen Klein, Rostyslav Lesyuk +2
Quasi two-dimensional (2D) colloidal synthesis made quantum confinement readily accessible in perovskites, generating additional momentum in perovskite LED research and lasing. Ult…
Synthesis, Optoelectronic Properties, and Charge Carrier Dynamics of Colloidal Quasi-two-dimensional Cs3Bi2I9 Perovskite Nanosheets
Sushant Ghimire, Chris Rehhagen, Saskia Fiedler +3
Non-toxicity and stability make two-dimensional (2D) bismuth halide perovskites better alternatives to lead-based ones for optoelectronic applications and catalysis. In this work,…
Template Mediated Formation of Colloidal Two-Dimensional Tin Telluride Nanosheets and the Role of the Ligands
Fagui He, Eugen Klein, Stephan Bartling +4
We report the colloidal synthesis of 2D SnTe nanosheets through precursor hot-injection in a nonpolar solvent. During the reaction, an important intermediate - Sn-template - is for…
Structural Reconstruction in Lead-free Two-dimensional Tin Iodide Perovskites Leading to High Quantum Yield Emission
Sushant Ghimire, Kevin Oldenburg, Stephan Bartling +2
We report a structural reconstruction-induced high photoluminescence quantum yield of 25% in colloidal two-dimensional tin iodide nanosheets that are synthesized by a hot-injection…
Role of Magnetic Coupling in Photoluminescence Kinetics of Mn2+-doped ZnS Nanoplatelets
Liwei Dai, Abderrezak Torche, Christian Strelow +8
Mn2+-doped semiconductor nanocrystals with tuned location and concentration of Mn2+ ions can yield diverse coupling regimes, which can highly influence their optical properties suc…
Colloidal two-dimensional metal chalcogenides: Realization and application of the structural anisotropy
Ziyi Hu, Ryan O'Neill, Rostyslav Lesyuk +1
Due to the spatial confinement, two-dimensional metal chalcogenides display an extraordinary optical re-sponse and carrier transport ability. Solution-based synthesis techniques su…
Colloidal manganese doped ZnS nanoplatelets and their optical properties
Liwei Dai, Christian Strelow, Tobias Kipp +8
Manganese (Mn)-doped ZnS nanocrystals (NCs) have been extensively explored for optical applications with the advantages of low toxicity, large Stokes shifts, and enhanced thermal a…
Single Crystalline Colloidal Quasi-Two-Dimensional Tin Telluride
Fu Li, Jiecai Fu, Abderrezak Torche +5
Tin telluride is a narrow gap semiconductor with promising properties for IR optical applications and topological insulators. We report a convenient colloidal synthesis of quasi-tw…
Function follows form: From semiconducting to metallic towards superconducting PbS nanowires by faceting the crystal
Mohammad Mehdi Ramin Moayed, Sascha Kull, Angelique Rieckmann +8
In the realm of colloidal nanostructures, with its immense capacity for shape and dimensionality control, the form is undoubtedly a driving factor for the tunability of optical and…
From wurtzite nanoplatelets to zinc blende nanorods: Simultaneous control of shape and phase in ultrathin ZnS nanocrystals
Liwei Dai, Rostyslav Lesyuk, Anastasia Karpulevich +3
Ultrathin semiconductor nanocrystals (NCs) with at least one dimension below their exciton Bohr radius receive a rapidly increasing attention due to their unique physicochemical pr…
Micron-size two-dimensional methylammonium lead halide perovskites
Eugen Klein, Andres Black, Öznur Tokmak +3
Hybrid lead halide perovskites with 2D stacking structures have recently emerged as promising materials for optoelectronic applications. We report a method for growing 2D nanosheet…
In-plane anisotropic faceting of ultralarge and thin single-crystalline colloidal SnS nanosheets
Fu Li, Mohammad Mehdi Ramin Moayed, Eugen Klein +2
The colloidal synthesis of large thin two-dimensional (2D) nanosheets is fascinating but challenging, since the growth along the lateral and vertical dimensions need to be controll…
Colloidal Lead Iodide Nanorings
Eugen Klein, Leonard Heymann, Ana B. Hungria +2
Colloidal chemistry of nanomaterials experienced a tremendous development in the last decades. In the course of the journey 0D nanoparticles, 1D nanowires, and 2D nanosheets have b…
Copper sulfide nanosheets with shape-tunable plasmonic properties in the NIR
Rostyslav Lesyuk, Eugen Klein, Iryna Yaremchuk +1
2D copper sulfide nanocrystals are promising building blocks for plasmonic materials in the near-infrared (NIR) spectral region. We demonstrate precise shape and size control (hexa…
Colloidal Tin Sulfide Nanosheets: Formation Mechanism, Ligand-mediated Shape Tuning and Photo-detection
Fu Li, Mohammad Mehdi Ramin Moayed, Frauke Gerdes +4
Colloidal materials of tin(II) sulfide (SnS), as a layered semiconductor with a narrow band gap, are emerging as a potential alternative to the more toxic metal chalcogenides (PbS,…