PerspectiveSOLAR CELLS

Perovskite solar cells join the major league

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Science  20 Nov 2015:
Vol. 350, Issue 6263, pp. 917
DOI: 10.1126/science.aad5891

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Just six years after their discovery, organolead halide perovskite solar cells have taken the lead among emergent photovoltaic (PV) technologies, thanks to the demonstration of power conversion efficiencies (PCEs) of up to 20% (1, 2). The perovskite precursor compounds are abundant and inexpensive and can easily be converted into thin films. Perovskite photovoltaics can therefore, in principle, generate electricity at a very low cost. However, high efficiencies have been limited to very small devices. On page 944 of this issue, Chen et al. (3) report perovskite solar cells of 1 cm2 with a certified efficiency of 15%.