Periodic Reporting for period 1 - 2for1-SingletFission (2 for 1: Quantum Dynamics of Singlet Fission)
Reporting period: 2016-10-05 to 2018-10-04
Conventional solar cell technology is limited to an energy conversion efficiency of 34%. This is because sunlight is comprised of a spectrum of colours, ranging from high energy ultraviolet to low energy infra-red light. Conventional solar cells are designed to harvest one energy of light efficiently. Higher energy light is harvested, but generates heat losses and low energy light is not harvested at all. In this project we studied a class of molecules which undergo a process called ‘singlet fission’ which allows for the generation of two excited molecules from one quanta of light. This allows us to engineer the solar spectrum with the intention of developing more efficient solar cells.
Singlet fission is still not completely understood. Of particular interest is the intermediate state in the singlet fission process and the effects of molecular orientation. The objectives of this project are to gain further insight into the process on rapid timescales (in some experiments less than 1 millionth of 1 millionth of a second!) by using a combination of optical and magneto-optical spectroscopies.
These results were disseminated via 2 international conferences, 3 peer-reviewed journal articles, and one public event (Marie Curie Falling Walls Lab as part of the Science is Wonder-ful event). It is expected that this project will contribute to a further 4 publications.