OLEDs have been considered as the most promising in light and display technology. With its energy efficiency and superior color, lighting and thinness, OLED has been incorporated in many significant and popular gadgets from mobile phones, ebooks, TVs, tablets, laptops, etc. However, there’s another fresh breed of similar technology that has been developed as potential replacement for OLED – the OLET.
photo via: Nanowerk
Organic Light Emitting Transistors or OLET in short, are rumoured to be 100 times better and efficient than OLED.
“OLET is a new light-emission concept, providing planar light sources that can be easily integrated in substrates of different nature – silicon, glass, plastic, paper, etc. – using standard microelectronic techniques,” Michele Muccini, a researcher from the ISMN, (nstitute of Nanostructured Materials, Bologna, Italy).
OLETs are more two times better in all aspects than optimized OLEDs and are way better. According to Nanowerk, the aspects where OLEDs show weaknesses are the areas where OLETs perform better. In addition to that, OLETS are developed in order to create a better light source technology that is free of the “deleterious photon losses and exciton quenching mechanisms inherent in the OLED architecture.” –Muccini. As these losses are those that confines the efficiency and brightness of OLEDs.
“The new trilayer heterostructure field-effect concept unravels the full potential of the light-emitting field-effect technology and restricts the limitation of OLEDs to only materials-related issues,” he continues. “Improvements in the top-layer field-effect mobility at high current density coupled to the use of triplet emitters will enable OLETs with even higher EQE and brightness.”
Muccini explains that their research and development are also focused on OLETs’ durability and efficiency under operational conditions for longer life. “A critical parameter to be addressed for the future development of the OLET technology is the device operating voltage” says Muccini. “The power efficiency at a given voltage is an essential figure-of-merit of any light-emitting device. Lower operating voltages are to be targeted using high-capacitance gate insulators. However, despite the necessary technical improvements, we believe that our tri-layer OLETs represent a viable route towards practical organic light-emitting devices with unprecedented performances.”
Via: Nanowerk
