Organic Light Emitting Transistors - More Efficient than OLED but will they make OLED obsolete?
Organic Light Emitting Diodes (OLEDs) are rapidly becoming the ‘go to’ technology for electronic display applications such as mobile phones, MP3 players, and TV screens. It seems there is a world of possibilities for OLED technology. However, they do have a significant drawback - certain physical processes that limit efficiency and brightness. This problem might be overcome with an organic light-emitting transistor (OLET), a new technology that combines a thin-film transistor and electroluminescent device.
OLETs use a specific structure that includes organic planar light sources that are integrated into substrates such as silicon, glass, plastic, or paper. Using proven FET (field effect transistor) technologies, the OLETs can control the exciton quenching and photon loss that lead to loss of brightness and to a relatively higher energy requirement.
An organic light-emitting material embedded in a multi-layer transistor-controlled structure is more efficient than that same material embedded in a layer that is essentially ‘on’ whenever the material has an electrical charge applied to it – as it does with OLED technology.
OLET researchers are confident that the technology presents the future path for high-use organic light-emitting devices. So will this technology make OLED obsolete?