1 research outputs found
High-Work-Function Molybdenum Oxide Hole Extraction Contacts in Hybrid Organic–Inorganic Perovskite Solar Cells
We
investigate the effect of high work function contacts in halide
perovskite absorber-based photovoltaic devices. Photoemission spectroscopy
measurements reveal that band bending is induced in the absorber by
the deposition of the high work function molybdenum trioxide (MoO<sub>3</sub>). We find that direct contact between MoO<sub>3</sub> and
the perovskite leads to a chemical reaction, which diminishes device
functionality. Introducing an ultrathin spiro-MeOTAD buffer layer
prevents the reaction, yet the altered evolution of the energy levels
in the methylammonium lead iodide (MAPbI<sub>3</sub>) layer at the
interface still negatively impacts device performance