Proceedings of Perovskite Thin Film Photovoltaics (ABXPV16)
Publication date: 14th December 2015
Oxford Photovoltaics Limited (Oxford PV) was founded in 2010 as a spin-out from the University of Oxford to develop and commercialize thin-film perovskite solar cells, which can be printed directly onto silicon solar cells, CIGS solar cells or glass. The present market-dominant c-Si technology has reached itspractical efficiency record of 25% and recent savings in cost have pushed the price to a value that isdifficult to reduce further. Therefore, a breakthrough is required that can push conversion efficiencies well beyond the 25% value withonly a minimal increase in cost. A promising approach is to place a low-cost high-bandgap semiconductor on top ofa State-of-the-Art Si device, thereby forming a double-junction tandem. This approach enables a better utilization of the high-energy photons and a realisation of efficiencies of 30%. This presentation will focus on our pioneering work developing perovskite thin-film solar cells to deliver a route to boosting the efficiency of current commercial cells. Recent advances in the company have shown a net gain in efficiency from 2-terminal tandem cells with a perovskite top cell over the bare silicon bottom cell. Extensive work on improving the stability of our cells has also led to single junction devices with over 1000 hours stability under light and load.