337 citations · 758 across the 21 of their papers we have counts for
14 papers · 1 filter
Pitfalls in Determining the Electrical Bandwidth of Non-Ideal Nanomaterials for Photodetection
Christine Schedel, Fabian Strauß, Marcus Scheele
The electrical 3 dB bandwidth is regularly used as a measure for the response speed of a photodetector and is estimated via various approaches in literature, ranging from direct me…
Substrate Effects on the Speed Limiting Factor of WSe Photodetectors
Christine Schedel, Fabian Strauß, Pia Kohlschreiber +3
We investigate the time-resolved photoelectric response of WSe crystals on common glass and flexible polyimide substrates to determine the effect of the dielectric environment…
Emergent properties in supercrystals of atomically precise nanocluster and colloidal nanocrystals
Korath Shivan Sugi, Andre Maier, Marcus Scheele
We provide a comprehensive account of the optical, electrical and mechanical properties that emerge from the self-assembly of colloidal nanocrystals or atomically precise nanoclust…
Sub-ns intrinsic response time of PbS nanocrystal IR-photodetectors
Andre Maier, Fabian Strauß, Pia Kohlschreiber +3
Colloidal nanocrystals (NCs), especially lead sulfide NCs, are promising candidates for solution-processed next-generation photodetectors with high-speed operation frequencies. How…
Impact of the Ligand Shell on Structural Changes and Decomposition of All-Inorganic Mixed-Halide Perovskite (CsPbX3) Nanocrystals under X-Ray Illumination
Jan Wahl, Philipp Haizmann, Christopher Kirsch +9
We show that the decomposition of caesium lead halide perovskite nanocrystals under continuous X-ray illumination depends on the surface ligand. For oleic acid/oleylamine, we obser…
Spatially resolved fluorescence of caesium lead halide perovskite supercrystals reveals quasi-atomic behavior of nanocrystals
Dmitry Lapkin, Christopher Kirsch, Jonas Hiller +16
We correlate spatially resolved fluorescence (-lifetime) measurements with X-ray nanodiffraction to reveal surface defects in supercrystals of self-assembled caesium lead halide pe…
A Neutron Scattering Perspective on the Structure, Softness and Dynamics of the Ligand Shell of PbS Nanocrystals in Solution
Tilo Seydel, Michael Marek Koza, Olga Matsarskaia +7
Small-angle neutron and X-ray scattering, neutron backscattering and neutron time-of-flight spectroscopy are applied to reveal the structure of the ligand shell, the temperature-de…
Structure-transport correlation reveals anisotropic charge transport in coupled PbS nanocrystal superlattices
Andre Maier, Dmitry Lapkin, Nastasia Mukharamova +14
Semiconductive nanocrystals (NCs) can be self-assembled into ordered superlattices (SLs) to create artificial solids with emerging collective properties. Computational studies have…
Revealing Grain Boundaries and Defect Formation in Nanocrystal Superlattices by Nanodiffraction
Nastasia Mukharamova, Dmitry Lapkin, Ivan A. Zaluzhnyy +8
X-ray nanodiffraction is applied to study the formation and correlation of domain boundaries in mesocrystalline superlattices of PbS nanocrystals with face-centered cubic structure…
A Dye-Sensitized CdSe Nanocrystal Optical Transistor with High ON/OFF Ratio in the First Telecom Window with 74 ns Rise Time
Krishan Kumar, Quan Liu, Jonas Hiller +5
We report an optically gated transistor composed of CdSe nanocrystals (NCs), sensitized with the dye Zinc beta-tetraaminophthalocyanine for operation in the first telecom window. T…
Dye-Sensitized Ternary Copper Chalcogenide Nanocrystals: Optoelectronic Properties, Air Stability and Photosensitivity
Sonam Maiti, Santanu Maiti, Ali Hossain Khan +5
We report on the effect of ligand exchange of copper sulphide selenide as well as copper selenide nanocrystals with the organic pi-system Cobalt beta-tetraaminophthalocyanine and a…
Thermoelectric properties of lead chalcogenide core-shell nanostructures
Marcus Scheele, Niels Oeschler, Igor Veremchuk +5
We present the full thermoelectric characterization of nanostructured bulk PbTe and PbTe-PbSe samples fabricated from colloidal core-shell nanoparticles followed by spark plasma si…
ZT enhancement in solution-grown Sb(2-x)Bi(x)Te3 nanoplatelets
Marcus Scheele, Niels Oeschler, Igor Veremchuk +6
We report a solution-processed, ligand supported synthesis of 15-20 nm thick Sb(2-x)Bi(x)Te3 nanoplatelets. After complete ligand removal by a facile NH3-based etching procedure, t…
Synthesis and thermoelectric characterization of Bi2Te3 nanoparticles
Marcus Scheele, Niels Oeschler, Katrin Meier +3
We report a novel synthesis for near monodisperse, sub-10-nm Bi2Te3 nanoparticles. At first, a new reduction route to bismuth nanoparticles is described which are applied as starti…