Dec 7 – 8, 2021 Online only
Europe/Berlin timezone

Operando study of humidity on the performance of perovskite solar cell

VC Room link
Only available for registered users!
Dec 8, 2021, 10:30 AM
1h 30m
Board: P-40
Poster Material Science Poster Session II


Mr Kun Sun


Perovskite solar cells (PSCs) are one of the most promising photovoltaic technologies and reached a certified 25.2% efficiency owing to their tuneable bandgap, high carrier mobility, long diffusion length and so on. The long-term operational stability of PSCs, however, has been not investigated. Herein, we probe the structure change with grazing-incidence small-angle scattering techniques (GISAXS) under high humidity. Also, the solar cell parameters are obtained simultaneously during the device operation. We find that PSCs fabricated with and without caesium iodide (CsI) show differences in the device degradation and morphology change in the perovskite layer. The decrease of open-circuit voltage (VOC) can be attributed to the morphology changes and the evolution of crystallize grain size. With the additive of CsI, solar cells show slow decay of VOC, which is correlated to improved morphology of active layer and passivation of trap states. Our work presents a crucial step towards a fundamental understanding of morphology change combined with solar cell parameters during the device operation.

Primary author


Mr Julian Heger Manuel Scheel (TUM E13) Lukas Spanier Xinyu Jiang (Technische Universität München Fakultät für Physik) Dr Sigrid Bernstorff (Elettra-Sincrontrone Trieste ) Peter Müller-Buschbaum (TU München, Physik-Department, LS Funktionelle Materialien)

Presentation materials