A5092463311- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Chalcogenide Semiconductor Thin Films
- Solid-state spectroscopy and crystallography
- Conducting polymers and applications
- Optical properties and cooling technologies in crystalline materials
- Gas Sensing Nanomaterials and Sensors
- Silicon Nanostructures and Photoluminescence
- Semiconductor Quantum Structures and Devices
- Advancements in Solid Oxide Fuel Cells
- Thermal Expansion and Ionic Conductivity
Delft University of Technology
2023-2024
Indium phosphide (InP) quantum dots (QDs) are considered the most promising alternative for Cd and Pb-based QDs lighting display applications. However, while core-only of CdSe CdTe have been prepared with near-unity photoluminescence yield (PLQY), this is not yet achieved InP QDs. Treatments HF used to boost PLQY up 85%. etches QDs, causing loss material broadening optical features. Here, we present a simple postsynthesis HF-free treatment that based on passivating surface InF3. For...
To increase the open-circuit voltage in solar cells based on triple cation, mixed halide perovskites, reducing recombination processes at interfaces with transport layers (TLs) is key. Here, we investigated charge carrier dynamics bilayers and trilayers of Cs0.05MA0.10FA0.85Pb(I0.97Br0.03)3 (CsMAFA) combined TLs using time-resolved microwave conductance (TRMC) measurements without bias illumination (BI). In bilayers, find balanced mobilities for electrons holes CsMAFA nearly quantitative...
Additives are commonly used to increase the performance of metal‐halide perovskite solar cells, but detailed information on origin beneficial outcome is often lacking. Herein, effect glycine hydrochloride investigated when as an additive during solution processing narrow‐bandgap mixed Pb–Sn perovskites. By combining characterization photovoltaic and stability under illumination, with determining quasi‐Fermi level splitting, time‐resolved microwave conductivity (TRMC), morphological elemental...
Mixed Sn–Pb halide perovskites are promising absorber materials for solar cells due to the possibility of tuning bandgap energy down 1.2–1.3 eV. However, tin-containing susceptible oxidation affecting optoelectronic properties. In this work, we investigated qualitatively and quantitatively metastable oxygen-induced doping in isolated ASnxPb1–xI3 (where A is methylammonium or a mixture formamidinium cesium) perovskite thin films by means microwave conductivity, structural optical...
Abstract To boost the efficiency of perovskite solar cells beyond limit a single‐junction cell, tandem are employed, requiring low bandgap materials. This is realized by partially substituting lead(II) (Pb 2+ ) with tin(II) (Sn in structure. In this work, scalable method presented to produce formamidinium lead tin iodide (FAPb 0.5 Sn I 3 films sequential thermal evaporation (sTE) PbSnI 4 , which an alloy SnI 2 and PbI FAI, vacuum. Annealing at 200 °C yields highly oriented crystalline layer...
Indium phosphide colloidal quantum dots (CQDs) are the main alternative for toxic and restricted Cd based CQDs lighting display applications. Here we systematically report on size-dependent optical absorption, ensemble single particle photoluminescence (PL) biexciton lifetimes of core-only InP CQDs. This systematic study is enabled by improvements in synthesis to yield a broad size series monodisperse with narrow absorption PL linewidth significant