A SMART PIXEL, a light emitting diode (LED) under the control of a field-effect transistor (FET), can now be made entirely out of organic materials on the same substrate for the first time. In general, the benefit of organic over conventional semiconductor electronics is that they should (when mass-production techniques take over) lead to cheaper, lighter, circuitry that can be printed rather than etched. Ananth Dodabalapur and his colleagues at Bell Labs (908-582-4266, anath@physics.bell-labs.com) have made 300-micron-wide pixels using polymer FETs and LEDs made from a sandwich of organic materials, one of which allows electrons to flow, another which acts as highway for holes (the absence of electrons); light is produced when electrons and holes meet. The pixels are quite potent, with a brightness of about 2300 candela/m², compared to a figure of 100 for present flat-panel displays. (Dodabalapur et al., Applied Physics Lett., 13 July; see figure at Physics News Graphics) A Cambridge University group has also made an all-organic device, not as bright as the Bell Labs version, but easier to make on a large scale (Sirringhaus et al., Science, 12 June.)