An OLET (Organic Light Emitting Transistor) is a transistor that emits light, made from organic materials. OLETs are similar to OLED displays, but in an OLET the switching mechanism (the transistor) is built into the display itself, while in an OLED there is a need to add a transistor layer (the backplane).
OLETs are still at an early stage of development, but there is some commercialization effort underway. In 2011 researchers from the University of Florida developed an OLET device made from Carbon Nanotubes, called CN-VOLET (Carbon Nanotube Vertical OLET). The University spun-off the technology into a company called nVerPix, with funding from Nanoholdings.
In May 2016, nVerPix presented its technology for the first time. nVerPix demonstrate a working mono-color (green) 320x240 2.5" display. The aperture ratio is 70% and the brightness is over 500 nits. nVerPix says that its technology is compatible with existing LCD backplane infrastructure and may enable cost-effective flexible solution-based OLETs with increased lifetime and improved image.