Perovskite fever - p837

doi:10.1038/nmat4079

Staggering increases in the performance of organic–inorganic perovskite solar cells have renewed the interest in these materials. However, further developments and the support from academic and industrial partners will hinge on the reporting of accurate efficiency values.

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The light and shade of perovskite solar cells - pp838–842

Michael Grätzel

doi:10.1038/nmat4065

The rise of metal halide perovskites as light harvesters has stunned the photovoltaic community. As the efficiency race continues, questions on the control of the performance of perovskite solar cells and on its characterization are being addressed.

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Perovskite solar cells: Continuing to soar - pp845–846

Michael D. McGehee

doi:10.1038/nmat4050

The dream of printing highly efficient solar cells is closer than ever to being realized. Solvent engineering has enabled the deposition of uniform perovskite semiconductor films that yield greater than 15% power-conversion efficiency.

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See also: Article by Jeon et al.

Solvent engineering for high-performance inorganic–organic hybrid perovskite solar cells - pp897–903

Nam Joong Jeon, Jun Hong Noh, Young Chan Kim, Woon Seok Yang, Seungchan Ryu and Sang Il Seok

doi:10.1038/nmat4014

The performance of solar cells based on organic–inorganic perovskites strongly depends on the device architecture and processing conditions. It is now shown that solvent engineering enables the deposition of very dense perovskite layers on mesoporous titania, leading to photovoltaic devices with a high light-conversion efficiency and no hysteresis.

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See also: News and Views by McGehee