60 cm2 perovskite-silicon tandem solar cells with an efficiency of 28.9% by homogeneous passivation
Abstract
Abstract Inverted perovskite solar cells face performance limitations due to non-radiative recombination at the perovskite surfaces in devices, including functional layers. Advanced characterization and density functional theory reveal that phosphonic acids passivate perovskite surface defects, while piperazinium chloride mitigates interface recombination by improving energy level alignment, introducing a field effect, and homogenizing the surface. Together, the quasi-Fermi level splitting of the perovskite is homogeneously increased by ca. 100 mV. This enables two-terminal perovskite-on-silicon tandems to achieve a certified open-circuit voltage of 2 V for a 1 cm² device and high performance in excess of 31%. The scalability of the passivation is furthermore demonstrated with homogeneously passivated devices reaching certified efficiencies of 28.9% for an active area of 60 cm².
Article Details
Authors (22)
Kerem Artuk
Aleksandra Oranskaia
Deniz Turkay
Felipe Saenz
Mounir D. Mensi
Michele De Bastiani
Andrés-Felipe Castro-Méndez
Julien Hurni
Christophe Allebé
Mostafa Othman
Lisa Champault
Austin G. Kuba
Alexandra Levtchenko
Daniel A. Jacobs
Jean-Baptiste Puel
Daniel Ory
Felix Lang
Aïcha Hessler-Wyser
Udo Schwingenschlögl
Quentin Jeangros
Christophe Ballif
Christian M. Wolff