Marktech launches high power 280nm UVC LEDs
Marktech Optoelectronics has launched several new 280nm UVC LEDs in single-, two-chip, and four-chip configurations, an innovation designed to accelerate the development and prototyping of UVGI water purifiers, air disinfection systems, and surface sanitisers.
The new UVC LEDs providev wall plug efficiencies of up to 7 percent, and are designed for longevity, exceeding 15,000 hours at L70. The two, four, and custom multiple UVC LED chip options enable high optical output in a compact format.
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, says Marktech.
Thanks to more favourable 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, according the company. 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.
“The introduction of 280nm UVC LEDs from Marktech is a significant milestone for both sensing and germicidal UV applications,” said Gary Kardys, chief marketing officer of Marktech Optoelectronics. “By providing these high-power UVC LEDs, we are delivering superior high-power with long life and a reasonable $/watt cost, which empowers designers to bring more efficient solutions to market quicker than ever.
