Over the last 20 years, photo voltaic solar cells (PV) for power generation has grown an industry that focuses on getting better materials to more efficiently use the solar energy that is available. With efficiencies approaching 10%, huge effort has been focused onto improving efficiency by using multi layer materials & thin film technologies such as DSSC to improve performance due to the huge positive impact they have on the carbon economy and on their downstream scalability. A previous programme (CONVERT) developed long life down converting phosphors that could be used in cells and coatings to transfer more of the suns energy into preferred PV frequencies - in this TSB DSSC Grand Challenges programme, we will aim to take these innovative materials and develop an optimised DSSC approach. We aim to combine this with enhanced light handling technology to use more of the suns energy that hits the non converting part of the DSSC which can be up to 30% of the total area. By combining these two techniques, applicable to all cells, we aim to enhance the Grand Challenge PV systems and put a the first part of a supply chain in place ready for production and scale up in the UK.