Marktech Optoelectronics Launches Advanced High Power 280nm UVC LEDs

Critical Advantages of Marktech’s new 280nm UVC LEDs:

1. High Efficiency: Featuring 280nm emitting chips, these UVC LEDs provide outstanding power efficiency with wall plug efficiencies of up to 7%.
2. Durability and Eco-friendliness: The UVC LEDs are designed for longevity, exceeding 15,000 hours at L70
3. Multiple-Chip Options: Two, four, and custom multiple UVC LED chip options enable high optical output in a compact format for demanding disinfection, medical device sterilization, and sanitization applications.
4. Versatile Applications: 280nm UVC LEDs are ideal for a diverse range of uses such as medical equipment, gas monitors, water quality sensors, DNA purity analyzers, UVGI air systems, water purifiers, surface sanitizers, and consumer appliances 

280nm UVC LEDs are key components in a wide array of applications, including water quality sensors, DNA purity or protein analyzers, UV-vis spectrometers, UV illuminators, upper-air disinfection systems, UV tower surface sanitizing robots, UVC water purifiers, and more, across both industrial and consumer product sectors.

Key Applications of 280nm Wavelength:

• Biochemistry & Proteomics: Used in spectrophotometers (such as Nanodrop) to measure protein concentration, often to calculate the ratio to assess protein contamination in nucleic acid samples. 
• Sterilization & Disinfection: As part of the UV-C spectrum, this wavelength acts as a strong germicidal agent by damaging the DNA/RNA and protein of microorganisms. 
• Label-Free Biomedical Imaging: The 280nm wavelength can be used in microscopy to detect the intrinsic fluorescence (autofluorescence) of tyrosine and tryptophan in proteins, allowing imaging of tissues without staining. 
• Chromatography Inspection: Used in liquid chromatography detectors to monitor protein elution in real-time. 
• Material Inspection & Curing: UV LED systems can utilize this wavelength for specialized curing of inks, adhesives, and coatings, as well as in industrial inspections. 

UVC light destroys bacteria and microbes by damaging their DNA, making them unable to reproduce. The effectiveness of a UVGI system depends on two factors: the germicidal efficiency of the wavelength used, and the optical output power delivered to the target surface. While 260–265 nm wavelengths sit closest to DNA’s peak absorption point, the dose of UV energy delivered — measured in mW/cm² over time — is equally critical to how quickly pathogens are inactivated.

This is where 280 nm UVC LEDs offer a compelling advantage. Thanks to more favorable semiconductor physics in AlGaN LED structures, 280 nm LEDs can deliver significantly higher optical output than their 265nm counterparts, often two to five times greater. This higher irradiance means target inactivation doses are reached faster, more than compensating for the modest reduction in per-photon germicidal efficiency. Additionally, 280 nm light damages both microbial DNA and proteins, providing a broader inactivation mechanism that enhances overall system performance.