The PlusAlliance collaboration between UNSW, ASU and Kings College London held a workshop on the topic Nanoscale optical structures for high efficiency photovoltaic solar power conversion. The workshop was led by Professor Stephen Goodnick (ASU), Professor Ned Ekins-Daukes (UNSW) and Professor Anatoly Zayats (KCL) with the aim to fuse practical techniques and computational methods that have been developed independently at ASU, KCL & UNSW to establish the next generation of highly efficient solar cells. The researchers from Arizona State University (ASU), King’s College London, UNSW Sydney, Sharp Laboratories Europe and their colleagues from around the world discussed emerging approaches to better solar cells. The workshop was hosted at the Kavli Royal Society International Centreat Chicheley Hall, U.K. from 1st to 3rdof October 2018.