Improve the stability of third-generation photovoltaic cells. Solar energy is a direct tie to the UN Global Goal 7 (Affordable and clean energy). Perovskite and organic solar cells are expected to introduce affordable, flexible solar cells and enable innovative solutions such as vehicles and building-integrated solar cells where it was previously hardly possible. This ties into Global Goal 9 (Industry, Innovation, and Infrastructure). The key challenge to these emerging photovoltaic technologies is their inferior stability.
Spiro-OMeTAD ink with tunable work function levels; triphenylamine-based radicals. Based on the Spiro-OMeTAD ink as the transport layer, we achieve high power conversion efficiencies (PCEs) over 25% (certificated) perovskite-based solar cells and much-improved device stability under harsh conditions, around 10 times increase in moisture stability compared to traditional materials and representing the highest efficiency with the best stability up to now.