UV-B LED chips are a type of LED chip that emits ultraviolet (UV) light in the UV-B spectral range, which is between 280 and 315 nanometers (nm) in wavelength. UV-B light is known to cause skin damage and contribute to skin cancer, but it also has beneficial effects, such as helping the body produce vitamin D.
UV-B LED chips are made using similar semiconductor materials as UV-C LED chips, such as aluminum gallium nitride (AlGaN) or aluminum nitride (AlN). The bandgap energy of these materials corresponds to the UV-B wavelength range, allowing them to emit UV-B light when a voltage is applied.
UV-B LED chips are used in a variety of applications, including medical treatments, phototherapy for skin conditions, and scientific research. They offer advantages over traditional UV-B lamps, such as lower power consumption, longer lifetimes, and more precise control over the emitted wavelength. However, UV-B LED chips also face challenges, such as lower efficiency and higher costs compared to traditional UV-B lamps. Ongoing research and development in the field of UV-B LED technology aim to address these challenges and improve the performance and availability of UV-B LED chips.