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You are here: About OLEDs > What are OLEDs What are OLEDs? OLEDs (organic light-emitting diodes) are semiconductors composed of layers of thin organic materials which are only a few nanometres thick. The light they emit diffuses to form an area light source. In the rapidly-growing display market, OLEDs are a key part of the revolution: the dream of paper-thin, highly-efficient displays with brilliant colours and great design flexibility. OLEDs represent the future for a vast array of completely new lighting applications. By combining colour with shape, organic LEDs will introduce a new way to use light for decorating and creating personalized surroundings. Additionally, OLEDs offer the potential to become even more cost and energy-efficient than energy-saving bulbs.