The COLED-polymer combination displaying green light. (Photo: SRI International, Menlo Park, Calif.)
COLED displaying white light (Photo: SRI International, Menlo Park, Calif.)
Scientists at SRI International have found an innovative design for organic light-emitting diodes (OLED) that makes use of cavities to enhance their luminosity and energy efficiency. The device, called a COLED (where the 'c' stands for 'cavity') was designed by Dr. Yijian Shi and employs a regular pattern of cavities, implementing a structure that generates as much as five times the light output of a standard OLED per watt consumed depending on the color being displayed.
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