Light-emitting diodes (LEDs) have revolutionized modern lighting and sensing technology. From applications in our homes to industry, LEDs are used for all lighting applications, from indoor lighting over TV screens to biomedicine. Widely used organic LEDs (OLEDs) today, for example in smartphone screens, employ organic thin-film materials as a semiconductor. However, their maximum brightness remains limited; just think of trying to read your smartphone screen on a very sunny day.