Victor Gray is a Post Doc for Jerker Mårtensson at the division of Organic Chemistry. In collaboration with groups at the Physical Chemistry and Polymer Chemistry divisions Victor will develop systems capable of up- or downconverting photons. Photon upconversion means that two low energy photons can be fused into one high energy photon. This means that some photochemical and photophysical processes, which otherwise require high energy light (UV), could be run with sunlight. Down conversion on the other hand means that one high energy photon can generate two photons or charge carriers. Both up- and downconversion can improve the efficiencies in solar cells.