Asahi Kasei, a diversified Japanese multinational company, and subsidiary Crystal IS have demonstrated their next-generation Klaran single-chip UVC LED which emits at 160 mW in the ideal germicidal range of 260-270 nm. Setting a new record for single-chip device output in a commercial device, this achievement marks a significant 60% increase over prior Crystal IS devices while retaining the optimal wavelength for germicidal efficiency. This higher output device will be used to accelerate the adoption of UVC LEDs and hasten the widespread replacement of low-pressure mercury lamps. While the new device will retain the Klaran compact 3.5 mm x 3.5 mm package and solder pad design to allow backward compatibility with existing customer designs, the higher output will allow UVC LEDs to meet the performance and cost targets needed to expand into new applications in high-flow water and air treatment.
The new single-chip UVC LED design uses a rigid fused silica lens and a thin layer of proprietary UVC transparent resin developed by Asahi Kasei specifically to withstand the intense UVC output. In contrast to soft molded lens, the rigid fused silica lens allows higher transmission of the UVC light which ensures stable long-life performance and high-temperature stability. Asahi Kasei leveraged its long-running expertise in the field to develop the proprietary resin after a careful and lengthy evaluation of commercially available adhesives resulted in no suitable candidate.
“This new high-output and long-life Klaran device is made possible by the strong cooperation between Crystal IS and Asahi Kasei innovation teams,” said Eoin Connolly, President and CEO. “With this new device in our portfolio, Klaran UVC LED devices make another significant step forward in replacing low-pressure mercury lamp technology and promoting the transition to non-mercury/non-ozone generating devices.”
For more information on the new 160 mW single chip from Crystal IS and to request an engineering sample, visit the company’s website at www.cisuvc.com. Commercial product release is expected later in 2023.
The data in this chart shows the operation of Klaran LEDs with a rigid fused silica lens and proprietary UVC transparent resin by Asahi Kasei. Typical operating currents (350 – 500 mA) result in 130 – 160 mWs of optical UVC LED power output. The test results convey that the Klaran with silica lens offers 60% greater WPE and mW output at the same current as the non-lens version. The Klaran diagram below the chart visually represents the components of the engineering sample.
More information also can be found at https://klaran.com/products/klaran.