A5073138680- Perovskite Materials and Applications
- Quantum Dots Synthesis And Properties
- Solid-state spectroscopy and crystallography
- Chalcogenide Semiconductor Thin Films
- 2D Materials and Applications
- Conducting polymers and applications
- X-ray Diffraction in Crystallography
- Advanced Cellulose Research Studies
- Organic and Molecular Conductors Research
- Biosensors and Analytical Detection
- Silicon and Solar Cell Technologies
- Gold and Silver Nanoparticles Synthesis and Applications
- Photochemistry and Electron Transfer Studies
- Nanocluster Synthesis and Applications
- Advanced Photocatalysis Techniques
- Organic Light-Emitting Diodes Research
- Carbon and Quantum Dots Applications
- Thin-Film Transistor Technologies
- Crystallization and Solubility Studies
- Silicon Nanostructures and Photoluminescence
- Organic Electronics and Photovoltaics
- Luminescence Properties of Advanced Materials
- Heavy Metal Exposure and Toxicity
- Luminescence and Fluorescent Materials
National Yang Ming Chiao Tung University
2018-2025
King Saud University
2016
Multifunctional photodetectors (PDs) with broadband responsivity (R) and specific detectivity (D*) at low light intensities are gaining significant attention. Thus, we report a bilayer PD creatively fabricated by layering two-dimensional (2D) Sb2Se3 nanoflakes (NFs) on one-dimensional (1D) ZnO nanorods (NRs) using simple thermal transfer hydrothermal processes. The unique coupling of these two layers materials in nanostructured form, such as 2D-Sb2Se3 NFs/1D-ZnO NRs, provides an effective...
Bismuth oxyiodide (BiOI), a two-dimensional material, is well known for its photocatalytic and photovoltaic properties owing to low bandgap, efficient charge separation, suitable work function that facilitates various reactions. However, the performance of BiOI depends on synthetic methods, as they dictate growth directions overall quality nanosheets or crystals produced. Herein, we investigated morphology charge-separated character in photoexcited states nanocrystals/sheets produced from...
Organic–inorganic lead halide perovskite nanocrystals have attracted much attention as promising materials for the development of solid-state light-emitting devices, but existence free or bound excitons formation trap states remains under debate. We recorded temperature-dependent electroabsorption (E-A) and electrophotoluminescence (E-PL) spectra, that is, electric-field-induced change in absorption photoluminescence methylammonium tribromide (MAPbBr3) colloidal nanocrystals, quantum dots...
Temperature-dependent electroabsorption (E-A) spectra of methylammonium lead tri-iodide (MAPbI3) solid film, which result from the quadratic Stark effect exciton absorption band, have been analyzed with an integral method. The change in electric dipole moment (Δμ) and polarizability (Δα) following was determined at each temperature; profile separated into band a continuum caused by transition valence to conduction position linewidth were temperature. As temperature decreased, phase occurred...
Abstract Steady‐state and time‐resolved photoluminescence (PL) electrophotoluminescence (E‐PL) have been recorded for bulk heterojunction samples of thin films regio‐regular poly(3‐hexylthiophene) (P3HT) methyl [6,6]‐phenyl‐C61‐butanoate (PCBM). The PL spectra the showed a monotonic decrease quantum yield with increased PCBM content in film. decay was measured both femtosecond up‐conversion technique time‐correlated single‐photon‐counting technique. mechanism quenching deviated from simple...
Two-dimensional (2D) layered MoS2 nanosheets (NSs) possess many unique properties and hold great potential for various applications. Herein, NSs were synthesized by a hydrothermal method. The as-synthesized are crystalline layered. Absorption electroabsorption (E-A) spectra of doped in poly(methyl methacrylate) (PMMA) thin film measured at different temperatures (290–40 K). E-A detected the second harmonic modulation frequency applied electric field analyzed using an integral method...
Photoluminescence (PL) spectra, time-resolved PL and decay profiles have been observed for carbon nanodots (CDs) with different excitation wavelengths in an embedded solid film solution. spectra also monitoring wavelengths. Then, it is found both solution that not only the location of but peak show a significant red shift, as become longer, respectively, indicating emitting states excitation-dependent are real state to which direct absorption occurs from ground state, transient trapped...
Electric field-induced broadening and narrowing of an exciton absorption band have been observed to depend on the polarity applied electric field for methylammonium lead triiodide perovskite (MAPbI3) as a thin film sandwiched between conducting fluorine-doped tin oxide (FTO) insulating poly(methyl methacrylate) (PMMA). The width increased or decreased when direction was toward FTO PMMA, respectively, indicating that spectral become switchable altering field. When titanium (TiO2) in compact...
<title>Abstract</title> Although many dyes have been introduced into cellulose, whether bound to its backbone or within a cellulose matrix, few studies determined the statically dynamically quenches dye’s photoluminescence. To advance cellulosic fluorescent films, backbone’s influence on photoluminescence must be understood. We fluorescence properties of fluorescein isothiocyanate (FITC) and fluorescein-labeled (FLC) in water alcohol, including their quantum yields ϕPL, lifetimes τ, rates...
Abstract Although many dyes have been introduced into cellulose, whether bound to its backbone or within a cellulose matrix, few studies determined the statically dynamically quenches photoluminescence of dye. To advance cellulosic fluorescent films, influence on must be understood. We fluorescence properties fluorescein isothiocyanate (FITC) and fluorescein-labeled (FLC) in water alcohol, including their quantum yields $$\boldsymbol{\phi}_{\textit{\textbf{PL}}}$$ , lifetimes...
The influence of applied electric field (FA) on the absorption spectra a methylammonium lead tri-iodide (MAPbI3) crystalline film sandwiched between fluorine-doped tin oxide (FTO) layer and polymer poly(methyl methacrylate) (PMMA) (Sample I) compact titanium (cp-TiO2) PMMA II) has been investigated by first harmonic modulation spectroscopy various temperatures in range 290–60 K. linear electroabsorption spectra, EA(1f), MAPbI3 Sample I showed very different behaviors temperature above below...
Electroabsorption (E-A) spectra of methylammonium lead triiodide (MAPbI3) are found to depend on the power density illumination light (IL-D) in both tetragonal and orthorhombic phases when modulation frequency (M-F) applied electric field (F) is low. As IL-D increased, E-A intensity decreased shape altered from that similar second derivative exciton absorption band having a Gaussian profile one first derivative, M-F F When high, were independent illumination. Orientational polarization...