Electrically pumped organic lasers (EPOL) could be easily integrated into other printable, flexible and disposable optoelectronic systems for applications in spectroscopy, biology and health, or for displays and sensors. The objective of IDOL is to develop these promising light sources, which is an important challenge in organic electronics. The project consortium is composed of engineers and researchers in optics, synthetic chemists, physicists and electronic engineers. Organic light emitting transistors will be used to achieve high current density and to minimize light/electrode losses. Optical simulations and advanced characterizations will guide the development of the devices step by step. New electron transport and light emitting molecules will be synthesized to overcome the technological hurdles from a material point of view.