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ACS Appl. Energy Mater. 2024, 7, 22, 10259–10270. To boost the efficiency of silicon solar cells we propose hole-selective passivating contacts based on  silicon nitride (SiNx) and aluminium oxide (AlOx). We applied these nanolayers using advanced deposition techniques between silicon – polysilicon interfaces. By deeply understanding their properties we identified strategies to significantly enhance their performance, fabricating a hole-selective contact with an implied Voc of 698 mV and a J₀ of 34 fA/cm2. These results are among the best reported for nitride based hole-selective contacts.

Progress in Photovoltaics: Research and Applications,1–15, 2023. We report a novel graphene doping technique via thin film ‘ion-charged dielectrics’ compatible with perovskite/silicon tandem solar cells. By electrostatically doping graphene monolayers, we show a reduction of >60% in sheet resistance, with light transmittance through the graphene being entirely unaffected. Our model of perovskite/silicon tandem efficiency indicates that a doped graphene transparent conducting electrode could enhance cell performance while improving the sustainability of future solar energy devices.