NIR814 High‑Transparency Near‑Infrared Absorbing Dye – 814nm Peak for Invisible Functional Films and Photovoltaics
NIR814 is a high‑performance organic near‑infrared absorbing dye with peak absorption at 814nm. It is specifically designed for applications where high visible light transparency is required – the dye imparts almost no color to clear films, coatings, or plastics at typical loadings. This “invisible” NIR absorber is ideal for functional window films, NIR‑sensitive security features, photovoltaic efficiency enhancement, and laser welding of transparent assemblies where the weld line must remain invisible.
- Precise Absorption: λmax = 814±2 nm, strong narrow-band absorption for efficient NIR light capture.
- Superior Stability: Excellent thermal (heat-resistant) and photostability, ensuring consistent performance in harsh industrial environments.
- Broad Compatibility: Soluble in common organic solvents, compatible with polymers (PC, PMMA, epoxy) for diverse processing.
- Visible Light Transparent: High transmittance in visible spectrum, no color distortion for end products.
- Industrial-Grade Purity: High purity guarantees stable, reliable performance in large-scale applications.
- High Molar Extinction Coefficient: Effective even at low concentrations, reducing material usage and cost.
Specifications:
Appearance: Black powder
入Max: 814±2nm(MA）
Soluble: TL, n-BuOH,EtOH,MA
Key Applications of NIR Absorbing Dye NIR814
NIR814 provides superior performance in various sectors. Whether for defense or safety applications, it’s the go-to solution for near-infrared absorption needs.
- Laser Protection: Efficiently absorbs 814±2 nm laser, ideal for safety filters and eye protection equipment.
- Optical Filters: Selectively blocks NIR light while maintaining high visible transmittance for sensors and cameras.
- Biological Imaging: Suitable for in vitro detection and fluorescence imaging, with good tissue penetration and low background.
- Anti-Counterfeiting: Enables invisible NIR identification marks for high-value products, certificates and packaging.
- Functional Coatings/Films: Provides NIR shielding and thermal insulation for optical and heat-insulating products.
- Polymer Modification: Compatible with epoxy, PMMA, used in solar cell films and optical components.
Frequently Asked Questions (FAQ)
Q: Is NIR814 completely invisible to the eye?
A: At recommended loadings (0.05–0.1% in 0.5mm thick film), the dye imparts a very faint warm (slightly brownish) tint that is barely noticeable. For applications requiring absolute color neutrality, we recommend using NIR814 at the lower end of the loading range (0.05%) or combining it with a complementary blue‑absorbing dye.
Q: Can NIR814 be used for laser welding of polycarbonate to polycarbonate?
A: Yes. NIR814 works well with PC. For welding two clear PC parts, add 0.1% NIR814 to one part (the absorber) and keep the other part unmodified. Use an 808–820nm diode laser. The weld will be strong (>80% of base strength) and nearly invisible.
Q: Does NIR814 improve solar cell efficiency?
A: In properly designed luminescent solar concentrators or down‑shifting layers, NIR814 can increase efficiency by 2–5% relative, especially for cells with poor response in the 800–830nm region. Results depend strongly on the cell type and light conditions. We recommend testing with your specific photovoltaic architecture.
Q: Is NIR814 soluble in water?
A: No. NIR814 is soluble in organic solvents only. For water‑based systems, we offer custom water‑dispersible formulations – please contact us.
Enhance Your Product Line with High-Performance Infrared Dyes
Partner with Nichwellchem for reliable supply and technical expertise in near-infrared absorption dyes. We offer wholesale solutions tailored to industrial needs, ensuring the best quality and service.