A5076213977- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Organic Light-Emitting Diodes Research
- Covalent Organic Framework Applications
- Conducting polymers and applications
- Optical properties and cooling technologies in crystalline materials
- Chalcogenide Semiconductor Thin Films
- Technostress in Professional Settings
- Solid-state spectroscopy and crystallography
Korea Advanced Institute of Science and Technology
2019-2021
Daejeon University
2019
Government of the Republic of Korea
2019
Inorganic zero-dimensional perovskites, such as Cs4PbBr6, offer an underexplored opportunity to achieve efficient exciton formation and radiative recombination. In particular, the origin of sub-bandgap green emission from Cs4PbBr6 is not well understood. Herein, we develop a sequential deposition approach growing highly smooth films with low rms roughness 8.15 nm by thermal evaporation. We find that have excitonic absorption edge at 3.9 eV, but exhibit photoluminescence 2.4 quantum yield...
Because of its excellent optical properties and good stability, all-inorganic halide perovskite CsPbX3 (X = I, Br, Cl) has been attracting interest for use in light-emitting diodes (LEDs). One challenge is improving the efficacy spatial confinement excitons higher luminescence efficiency. Here, we present a simple yet very effective strategy to form fine-grain-structured CsPbBr3 polycrystalline films prepared by thermal co-evaporation. The involves controlling growth kinetics adjusting...
Highly efficient vacuum-deposited CsPbBr3 perovskite light-emitting diodes (PeLEDs) are demonstrated by introducing a separate polyethylene oxide (PEO) passivation layer. A film deposited on the PEO layer via thermal co-evaporation of CsBr and PbBr2 exhibits an almost 50-fold increase in photoluminescence quantum yield intensity compared to reference sample without PEO. This enhancement is attributed interfacial defects perovskite, as evidenced temperature-dependent measurements. However,...
We report the formation of a new class solvent-intercalated two-dimensional (SI-2D) formamidinium lead halide perovskites.
We report the synthesis of Bi-based lead-free halide perovskite nanocrystals (NCs) via a ligand-assisted reprecipitation (LARP) method. Detailed chemical analysis synthesized Cs–Bi–Br NCs, which are commonly called stoichiometric Cs3Bi2Br9, revealed that actual composition NCs was extremely Cs deficient. Photoluminescence (PL) spectra from Cs-deficient and BiBr3 were nearly identical except for higher emission intensity with Cs, suggested origin PL BiBr3, inclusion few atomic percentages...