Lead Sulfide Quantum Dots (PbS QD) 1250 nm

Lead Sulfide (PbS) Quantum Dots, optimized for a peak emission at 1250 nm, are high-purity semiconductor nanocrystals designed for cutting-edge applications in the Near-Infrared (NIR) spectrum. PbS QDs are distinguished by their exceptionally large Bohr exciton radius (approx. 18 nm), which enables precise band-edge tunability and broad absorption profiles. At 1250 nm, these quantum dots provide a strategic advantage for photovoltaic and sensing technologies by facilitating efficient charge carrier generation and transport. Their high photoluminescence quantum yield and robust photostability make them a superior alternative to organic infrared dyes. Engineered with advanced surface passivation, our PbS QDs minimize electronic traps, ensuring high performance in solution-processed optoelectronic devices and high-sensitivity infrared detection systems.

Applications

• Next-Generation Photovoltaics: Ideal for quantum dot sensitized solar cells (QDSSCs) and tandem solar cells, capturing NIR photons that are typically lost in standard silicon-based cells to push efficiency beyond the Shockley-Queisser limit.
• High-Sensitivity Photodetectors: Functions as the active layer in infrared sensors and cameras, enabling high-speed detection for LiDAR, remote sensing, and industrial quality control.
• NIR-II Bioimaging: Serves as a bright, photostable fluorescent probe for deep-tissue imaging; the 1250 nm emission window offers significantly reduced tissue scattering and autofluorescence compared to the visible range.
• Infrared Light Emitting Diodes (LEDs): Employed in the development of efficient NIR light sources for night vision illumination, optical communication, and non-invasive medical diagnostics.
• Solution-Processed Transistors: Used in thin-film transistors (TFTs) as a tunable semiconductor, facilitating the creation of flexible, large-area infrared-sensitive electronic circuits.
• Electrocatalysis & Solar Fuels: Leveraged for their high surface-to-volume ratio and energy level alignment to enhance electron transfer in electrochemical CO2 reduction and hydrogen production.
• Optical Logic & Computing: Applied in the development of all-optical switches and transistors, utilizing the fast nonlinear optical response of lead sulfide nanocrystals.