Andreas, Phoebe and Ned converge in Hawaii for WCPEC-7. Ned gave a tutorial 'Fundamentals of Photovoltaics', Andreas presented a paper 'Comparison Of Possible Realisations Of A Quantum Ratchet Intermediate Band Solar Cell', Phoebe presented two papers paper 'Characterization Of Sigesn For Use As A 1 Ev Sub-Cell In Multi-Junction Solar Cells' and 'Quantifying Parasitic Losses From Metal Scattering Structures In Solar Cells: How Uncertainty In Optical Constants Affects Simulation Results'. This latter paper has since been published in Solar Energy Materials and Solar Cells. The QPV Group also contributed to Ryan France's paper 'Multijunction Solar Cells With Graded Buffer Bragg Reflectors' that has also been published in the IEEE Journal of Photovoltaics.