the LEDs lose a major part of this efficiency at high current lighting due to the droop feature

Household bulbs generate white light due to the mix of wavelengths with the hue produced from blue and green LEDs. These valuable colors are the ‘droopiest’ of the LEDs and are difficult to design.

LEDs have increased energy-efficiency compared to the heat-generating incandescent bulbs. However, the LEDs lose a major part of this efficiency at high current lighting due to the droop feature. Although the droop-causing factor has not been clearly resolved, the research team at Led high bay light has devised an innovative technique to reduce droop by revolutionizing the production method of LEDs.

LED chips are created from layers of doped semiconductors packed together. By applying voltage through these layers, migration of electrons and holes takes place, which is directed toward an active layer area of LED, resulting in a photon. The commercially available blue LEDs, the c-plane accommodate the crystals that bind the semiconductor layers. Based on this standard orientation of the crystals, electrical fields that intervene during integration of the electrons and holes can be created.The research team from UCSB designed LEDs that consist of tilted and non-traditional crystal orientations that reduce the field’s effect, showing minimal droop. Based on this approach, compact and low-cost LED chips were developed by the researchers.

Under the ‘Solar Street Lighting Program in City Corporation’ project, the Power Division will introduce solar energy-driven LED technology covering one thousand kilometers of streets of Dhaka, Chittagong, Rajshahi, Khulna, Barisal, Sylhet and Rangpur city corporations.Our innovation team has tackled a previously insurmountable technical challenge: cooling a Led linear high bay light shaped replacement LED bulb without making it physically bigger,” says Steve Briggs, general manager of LED systems, GE Lighting. “Each subsystem such as optics, electronics and thermals needed to be designed for miniaturization and cooperative performance. We explored the limits of what’s possible and pushed far beyond industry expectations and competitors’ thinking and product offerings.”