Custom OEM UVC LED Technology Manufacturers & Supplier

Whitepaper: Engineering High-Output UVC LED Modules

The global shift from traditional low-pressure mercury vapor lamps to solid-state ultraviolet (UVC) LED systems marks a critical evolutionary step in germicidal disinfection. Traditional mercury discharge lamps contain hazardous materials and require high-voltage start-ups and complex ballasts. Conversely, AlGaN (Aluminum Gallium Nitride) semiconductor technology offers high energy density, digital control flexibility, and a compact design.

1. Physics of Solid-State Ultraviolet Germicidal Irradiation (UVGI)

UVC LEDs emit photons within the 100–280 nm spectrum. The optimal absorption band for DNA and RNA in pathogens lies between 260 nm and 270 nm, where pyrimidine dimers are formed. These dimers disrupt replication and transcription, neutralizing the microorganisms. Our custom OEM modules are engineered to focus on the 265 nm peak wavelength, delivering up to 30% higher germicidal efficiency than traditional 254 nm low-pressure mercury lamps.

2. Key Thermal Challenges in AlGaN Heterostructures

One of the primary challenges with UVC LEDs is their lower Wall-Plug Efficiency (WPE), typically ranging from 3% to 6%. The remaining input power is converted into heat. If the junction temperature ($T_j$) exceeds limits (typically 80°C), it leads to accelerated package decay, shifting wavelengths, and reduced lifetime.

Corexis addresses this thermal bottleneck using high-conductivity metal core PCBs (MCPCBs) with thermoelectric separation. Our designs employ thin dielectric layers (down to 50 μm) combined with high-purity aluminum or copper substrates, reducing system thermal resistance ($R_{th}$) to less than 4 K/W.

3. Custom Driver Design and Electrical Integrity

Unlike general lighting, UVC LED chips require precise constant-current regulation. Transient voltage peaks can damage AlGaN PN-junctions. By leveraging our deep expertise in high-speed computer RAM PCB and high-frequency circuit layouts, we design driver boards with built-in protection against voltage spikes, reverse polarity, and thermal runaway.

4. Macro Industry Application Solutions

We supply customized modules across several main commercial and industrial sectors:

• Flowing Water Sterilization: High-power LED arrays with quartz glass sleeves integrated into municipal, industrial, and residential water purifiers. They support flow rates from 2 LPM up to 100 LPM with a log-4 reduction of pathogens.
• Medical HVAC Purification: Modules designed for ducted heating and cooling systems to sanitize recirculating air, neutralizing airborne pathogens without producing ozone.
• Automated Surface Sanitization: Integrated modules with optical reflectors to maximize spatial irradiance ($mW/cm^2$) on conveyor lines in food packaging facilities.