The EU-funded LIGHT-CAP project aims to develop an eco-friendly technology for efficiently harnessing solar energy. It plans to combine energy conversion and storage in a single, compact, lightweight unit. The innovative idea behind LIGHT-CAP's hybrid technology is based on leveraging the cooperative electronic properties of zero- and two-dimensional nanomaterials and the potential of delocalised electrical charges after photoactivation. The disruptive technology will be demonstrated in device designs analogous to cell batteries, hybrid supercapacitors and electrolytic capacitors. LIGHT-CAP will bring together multidisciplinary teams from Germany, Italy, Spain and Switzerland.