Lead Sulfide Quantum Dots (PbS QD) 1550 nm

Lead Sulfide (PbS) Quantum Dots, optimized for a 1550 nm peak emission, are premier semiconductor nanocrystals engineered for high-performance applications in the Short-Wave Infrared (SWIR) spectrum. PbS QDs are distinguished by their exceptionally large Bohr exciton radius, which allows for precise bandgap tuning across a broad infrared range. At the 1550 nm threshold, these quantum dots coincide with the "C-band" of optical communications, offering superior photon management and high absorption cross-sections. These nanocrystals exhibit remarkable photoelectrical properties, including efficient multiple exciton generation (MEG) and high carrier mobility, making them a cornerstone for next-generation infrared optoelectronics. Synthesized to ensure high monodispersity and environmental stability, our PbS QDs provide a reliable platform for harvesting and emitting low-energy photons with maximum efficiency.

Applications

• Optical Telecommunications: Integrated into active components for fiber optic networks, specifically serving as high-efficiency signal amplifiers and emitters within the 1550 nm low-loss transmission window.
• SWIR Photodetectors & Sensors: Utilized in the fabrication of high-sensitivity infrared cameras and sensors for night vision, surveillance, and industrial sorting where visible light is obstructed.
• Advanced Photovoltaics: Employed in multi-junction and infrared-harvesting solar cells to capture the significant portion of the solar spectrum that lies beyond the visible range, boosting overall energy conversion.
• Biomedical NIR-II Imaging: Acts as a deep-tissue fluorescent marker in the second near-infrared window (NIR-II), enabling high-resolution imaging through skin and bone with minimal scattering.
• Field-Effect Transistors (FETs): Used as the active channel material in solution-processed transistors, leveraging their high charge-carrier tunable properties for flexible electronics.
• Environmental & Gas Sensing: Applied in the detection of specific molecular signatures (such as methane or CO2) that have characteristic absorption peaks in the short-wave infrared region.