Abstract
The ultimate goal of the solar-cell industry is to make inexpensive devices that are highly efficient at converting sunlight into electricity. The advent of perovskite semiconductors could be the key to reaching this goal. See Letter p.395 Nanostructured solid-state solar cells that incorporate organometallic halide perovskites as the light-absorbing material have recently attained levels of power conversion efficiency that are attractive for practical applications. Now Mingzhen Liu et al. show that, when using vapour deposition rather than the usual solution processing to deposit the perovskite, high efficiencies can be achieved with these materials in even simpler device structures. By removing the need for complex nanostructures altogether, the prospects for large-scale manufacture are potentially enhanced.
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