Lead Sulfide Quantum Dots (PbS QD) 950 nm

Lead Sulfide (PbS) Quantum Dots, precisely engineered for a 950 nm peak emission, deliver exceptional optical and electronic performance at the frontier of the visible and infrared spectrums. Due to their large Bohr exciton radius, these nanocrystals allow for fine-tuned bandgap control, resulting in high absorption cross-sections and efficient charge carrier generation. At 950 nm, our PbS QDs exhibit a high photoluminescence quantum yield (PLQY) and excellent photostability, making them a superior alternative to traditional organic NIR dyes. Optimized for solution-processing, these dots feature advanced surface passivation to minimize mid-gap trap states, ensuring superior carrier mobility and stable performance in high-speed photodetectors and third-generation photovoltaic cells.

Applications

• High-Sensitivity Photodetectors: Acts as the active semiconductor layer in NIR-sensitive sensors, extending the detection range of standard silicon-based cameras for LiDAR, industrial machine vision, and surveillance.
• Next-Generation Photovoltaics: Integrated into quantum dot solar cells to capture high-energy NIR photons, optimizing the spectral harvest and increasing the overall efficiency of thin-film solar devices.
• NIR-I Bioimaging & Labeling: Functions as a bright, deep-penetrating fluorescent probe for in-vivo imaging; 950 nm light offers reduced scattering and high contrast in biological tissues with minimal background interference.
• Infrared Light Emitting Diodes (LEDs): Used to develop stable 950 nm emitters for optical communications, proximity sensors, and specialized medical diagnostic instrumentation.
• Thin-Film Transistors (TFTs): Employed in flexible and printed electronics as a tunable semiconductor material, enabling the creation of infrared-responsive smart surfaces and wearable tech.
• Electrocatalytic Systems: Leveraged for their high surface-to-volume ratio to enhance electron transfer in electrochemical reactions, such as the hydrogen evolution reaction (HER).
• Optical Logic & Switching: Utilized in the development of nanophotonic circuits and all-optical switches, taking advantage of the fast nonlinear optical response of high-quality PbS nanocrystals.