Metal

Salt (chemistry)

Engineering

Oxide

Metallurgy

Materials science

Layer (electronics)

Perovskite (structure)

Inorganic chemistry

Chemical engineering

Pinhole (optics)

Physics

Nanotechnology

Organic chemistry

Optics

Ionic bonding

Chemistry

Impurity

Halide

Science

Stable perovskites with ionic salts Ionic liquids have been shown to stabilize organic-inorganic perovskite solar cells with metal oxide carrier-transport layers, but they are incompatible with more readily processible organic analogs. Lin et al. found that an ionic solid, a piperidinium salt, enhanced the efficiency of positive-intrinsic-negative layered perovskite solar cells with organic electron and hole extraction layers. Aggressive aging testing showed that this additive retarded segregation into impurity phases and pinhole formation in the perovskite layer. Science , this issue p. 96

A piperidinium salt stabilizes efficient metal-halide perovskite solar cells