UV-C LEDs



Product Overview


HexaTech’s UV-C LEDs are engineered for long life and stable optical output power using a proprietary high quality bulk Aluminum Nitride (AlN) substrate technology. Designed for operation in the UV-C spectrum between 250 – 280 nm, they are packaged in industry standard TO-39 and thermally efficient 3.5mm x 3.5mm ceramic packages.


Applications


•  Germicidal Disinfection
•  Water Purification
•  Surface Sterilization
•  Air Purification
•  Analytical Instrumentation, Emitters
•  Protein Analysis, DNA Sequencing, Drug Discovery
•  Forensic Analysis
•  Optical Sensing
•  Ozone Monitoring

UV-C LEDs with peak emission wavelength from 250nm to 280nm are used in a broad range of applications. HexaTech UV-C LEDs are optimally designed for the growing global market for germicidal disinfection applications. For over 40 years, UV light between 200 and 280 nm has been used for disinfection of water, and sterilizing air and surfaces. When microorganisms are exposed to wavelengths between 200nm and 280 nm, the UV-C energy destroys the DNA within the bacteria. Germicidal disinfection peaks at between 260nm and 265nm. The LEDs are designed to be most effective at this peak of the disinfection curve.


Product Features


Our LEDs are fabricated using our proprietary bulk aluminum nitride (AlN) substrates with our internal MOCVD epitaxial growth process, unique quantum well design, and p-contact structure. The industry leading lifetime performance we achieve with these LEDs is the direct result of growing low defect active layers of the AlGaN LED using a single crystalline aluminum nitride (AlN) substrate. This bulk substrate material with industry leading ultra low dislocation density enables UV-C LEDs to be fabricated with very high quality epitaxial structures that achieve highly stable optical performance. High quality single crystal AlN material is essential to achieve very high reliability and long lifetime performance at deep UV wavelengths.

Compared to mercury lamps, the LEDs instantly reach 100% intensity when turned on, the lifetime is not dependent on the number of on-off cycles, and they are mercury-free.

•  Long Lifetime
•  Stable Optical Output Power
•  Low Voltage Operation
•  Instant On
•  Mechanically Rugged
•  Flexible Reactor Chamber Design

Comparison of Mercury and UV LED Light Sources


Attribute Mercury Lamp UV LED
Bulb Lifetime 10,000 hrs 50,000 hrs
Warm-up time 2 - 15 min Instantaneous
On/Off Cycles Lifetime Degradation No Degradation
Intermittent Flow 10 - 60 min No-flow Limit Programmable
Flow Architecture Cylindrical Tube Adjustable/Versatile
Drive Circuits Complex Simple, Compact
Voltage 110 - 240 VAC 6 - 30 VDC
Emission Wavelength Polychromatic Fixed Customizable
Ruggedness Glass Tube Shock Resistant Semiconductor
Heavy Metals Mercury (20 - 200 mg) None


Optical Output Power - Expanding Product Portfolio


HexaTech is developing a broad portfolio of UV-C LEDs with a focus on producing high power single chip UVC LEDs. Wide band gap AlN substrates have superior thermal conductivity which enable high power LEDs. Our product roadmaps include increasing optical output power while maintaining long lifetime performance.


Long LED Lifetime Performance – Enabled Using Robust Substrate Technology


Long lifetime performance for UVC LEDs is achieved by using bulk AlN. AlN substrates enable the growth of high-quality, Al-rich AlGaN device structures that emit in the deep UV spectral range. For emission wavelengths in the deep UV spectrum (200 – 280 nm), over 70% aluminum is required in the AlGaN structure. HexaTech single crystal AlN substrates have very low dislocation densities are highly lattice matched with the high aluminum content in the AlGaN quantum well structure. We achieve industry-leading lifetimes through our extensive experience with bulk AlN, internal MOCVD homoepitaxy growth process, and our unique LED structures. Through our core competency for crystal growth and epitaxial growth, HexaTech UVC LEDs are leading the industry in lifetime performance.


Why HexaTech AlN For UV-C LED?


High Power - AlN substrates have superior thermal conductivity compared to sapphire substrates. Our product roadmaps include increasing optical output power while maintaining long lifetime performance.

Long Life – AlN substrates with very low dislocation density enable high quality homoepitaxy growth. The resulting high quality LEDs enable industry-leading lifetime and stable optical output power. HexaTech is recognized as the industry leader for very high quality single crystalline AlN substrates.

Low Cost Packaging Solutions – For high volume cost sensitive consumer and industrial applications, we have developed several low cost packaging solutions - thermally efficient 3.5mm x 3.5mm ceramic packages, AlN submount, and industry standard TO-39 packaging.

High Efficiency – LEDs fabricated on highly transparent substrates with high crystalline structures, enable very high internal quantum efficiency. Coupled with our optimized LED structures will provide industry leading performance.