Chemical Vapor Deposited Thin Palladium Sulfide Crystals for Highly Photoresponsive Photodetector
Year: 2024
Type: article
Abstract: Nonlayered palladium sulfide (PdS) is of interest due to its rich physical properties and promising applications in optoelectronic devices. However, the growth of thin nonlayered PdS remains challenging because of its intrinsic 3D lattice structure. Here, the first demonstration of the direct synthesis of thin rectangular PdS ribbons/flakes on SiO2/Si substrates by a facile chemical vapor deposition (CVD) approach is presented. The atomic structure and high crystalline quality of CVD‐derived PdS crystals are shown by scanning transmission electron microscopy. The nonlinear saturable absorption and absorption enhancement are revealed by using ultrafast optical pump‐probe spectroscopy, and the photocarrier dynamics present the hot phonon bottleneck and Auger recombination effects. Additionally, the Raman vibration modes display the polarization‐dependent properties verified by angle‐resolved polarized Raman spectroscopy. Importantly, the photodetector based on PdS ribbon demonstrates a decent photoresponsivity of ≈7.7 × 103 A W−1. These results provide an effective way to form thin nonlayered PdS with potential applications in the field of photodetection.
Source: Advanced Optical Materials
Institutions: Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area, Beihang University, Southern University of Science and Technology, Northwestern Polytechnical University, North China University of Science and Technology, Guilin University of Electronic Technology, Hunan University of Science and Technology, Beijing Institute of Technology, Chinese Academy of Sciences, Institute of Solid State Physics
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4402989720