Search Results - "Geuchies, Jaco J."
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Highly Emissive Divalent-Ion-Doped Colloidal CsPb1-xMxBr3 Perovskite Nanocrystals through Cation Exchange
Published in Journal of the American Chemical Society (22-03-2017)“…Colloidal CsPbX3 (X = Br, Cl, and I) perovskite nanocrystals (NCs) have emerged as promising phosphors and solar cell materials due to their remarkable…”
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Strong Carrier–Phonon Coupling in Lead Halide Perovskite Nanocrystals
Published in ACS nano (28-11-2017)“…We highlight the importance of carrier–phonon coupling in inorganic lead halide perovskite nanocrystals. The low-temperature photoluminescence (PL) spectrum of…”
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3
In situ study of the formation mechanism of two-dimensional superlattices from PbSe nanocrystals
Published in Nature materials (01-12-2016)“…A real-time study of the growth of two-dimensional nanocrystal superlattices with square periodicity shows the formation mechanism leading to the oriented…”
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4
Tuning and Probing the Distribution of Cu+ and Cu2+ Trap States Responsible for Broad-Band Photoluminescence in CuInS2 Nanocrystals
Published in ACS nano (27-11-2018)“…The processes that govern radiative recombination in ternary CuInS2 (CIS) nanocrystals (NCs) have been heavily debated, but recently, several research groups…”
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5
Controlling the electro-optic response of a semiconducting perovskite coupled to a phonon-resonant cavity
Published in Light, science & applications (26-07-2023)“…Optical cavities, resonant with vibrational or electronic transitions of material within the cavity, enable control of light-matter interaction. Previous…”
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Crystallization of Nanocrystals in Spherical Confinement Probed by in Situ X‑ray Scattering
Published in Nano letters (13-06-2018)“…We studied the formation of supraparticles from nanocrystals confined in slowly evaporating oil droplets in an oil-in-water emulsion. The nanocrystals consist…”
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7
Locating and Controlling the Zn Content in In(Zn)P Quantum Dots
Published in Chemistry of materials (14-01-2020)“…Zinc is routinely employed in the synthesis of InP quantum dots (QDs) to improve the photoluminescence efficiency and carrier mobility of the resulting…”
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Ultrafast hole relaxation dynamics in quantum dots revealed by two-dimensional electronic spectroscopy
Published in Communications physics (16-03-2023)“…Elucidating the population dynamics of correlated electron-hole pairs (bound excitons) in semiconducting quantum dots (QDs) is key for developing our…”
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Quantitative Electrochemical Control over Optical Gain in Quantum-Dot Solids
Published in ACS nano (26-01-2021)“…Solution-processed quantum dot (QD) lasers are one of the holy grails of nanoscience. They are not yet commercialized because the lasing threshold is too high:…”
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10
Spectroscopic Evidence for the Contribution of Holes to the Bleach of Cd-Chalcogenide Quantum Dots
Published in Nano letters (08-05-2019)“…In transient absorption (TA) measurements on Cd-chalcogenide quantum dots (QDs), the presence of a band-edge (BE) bleach signal is commonly attributed entirely…”
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Electrochemical Modulation of the Photophysics of Surface-Localized Trap States in Core/Shell/(Shell) Quantum Dot Films
Published in Chemistry of materials (22-10-2019)“…In this work, we systematically study the spectroelectrochemical response of CdSe quantum dots (QDs), CdSe/CdS core/shell QDs with varying CdS shell…”
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12
Zero-Threshold Optical Gain in Electrochemically Doped Nanoplatelets and the Physics Behind It
Published in ACS nano (22-11-2022)“…Colloidal nanoplatelets (NPLs) are promising materials for lasing applications. The properties are usually discussed in the framework of 2D materials, where…”
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13
Cuboidal Supraparticles Self-Assembled from Cubic CsPbBr3 Perovskite Nanocrystals
Published in Journal of physical chemistry. C (12-07-2018)“…Colloidal CsPbBr3 nanocrystals (NCs) have emerged as promising candidates for various opto-electronic applications, such as light-emitting diodes,…”
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14
Anisotropic Electron–Phonon Interactions in 2D Lead-Halide Perovskites
Published in Nano letters (17-07-2024)“…Two-dimensional (2D) hybrid organic–inorganic metal halide perovskites offer enhanced stability for perovskite-based applications. Their crystal structure’s…”
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Transiently delocalized states enhance hole mobility in organic molecular semiconductors
Published in Nature materials (01-11-2023)“…Evidence shows that charge carriers in organic semiconductors self-localize because of dynamic disorder. Nevertheless, some organic semiconductors feature…”
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Tailoring Polaron Dimensions in Lead‐Tin Hybrid Perovskites
Published in Advanced materials (Weinheim) (01-10-2024)“…Charge carriers in the soft and polar perovskite lattice form so‐called polaron quasiparticles, charge carriers dressed with a lattice deformation. The spatial…”
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Extended Nucleation and Superfocusing in Colloidal Semiconductor Nanocrystal Synthesis
Published in Nano letters (24-03-2021)“…Hot-injection synthesis is renowned for producing semiconductor nanocolloids with superb size dispersions. Burst nucleation and diffusion-controlled size…”
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Tuning the Inter‐Nanoplatelet Distance and Coupling Strength by Thermally Induced Ligand Decomposition
Published in Small (Weinheim an der Bergstrasse, Germany) (01-04-2024)“…CdSe nanoplatelets (NPLs) are promising 2D semiconductors for optoelectronic applications, in which efficient charge transport properties are desirable. It is…”
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Optical Switching of Hole Transfer in Double‐Perovskite/Graphene Heterostructure
Published in Advanced materials (Weinheim) (01-07-2023)“…Synergically combining their respective ultrahigh charge mobility and strong light absorption, graphene (Gr)/semiconductor heterostructures are promising…”
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Biexciton Binding Energy and Line width of Single Quantum Dots at Room Temperature
Published in Nano letters (14-07-2021)“…Broadening of multiexciton emission from colloidal quantum dots (QDs) at room temperature is important for their use in high-power applications, but an…”
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