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Issue 44, 2016
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Room-temperature water-vapor annealing for high-performance planar perovskite solar cells

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Abstract

We report here the discovery of a unique room-temperature water-vapor annealing (WVA) method to fabricate high performance planar heterojunction perovskite solar cells (pero-SCs) based on CH3NH3PbI3. High crystallinity and void-free perovskite films were obtained by the WVA treatment at room temperature without thermal annealing (TA) and the power conversion efficiency (PCE) of the pero-SCs reached 16.4% with a high open circuit voltage (Voc) of 1 V. A mechanism is proposed that the water vapor molecules catalyzed the dissolution and re-crystallization of the perovskite at the grain edges and void area, resulting in void-free and large sized crystals in the perovskite films and the improved photovoltaic performance. This WVA approach provides a simple, high-efficiency and energy conservation processing method in the fabrication of planar perovskite solar cells towards commercialization.

Graphical abstract: Room-temperature water-vapor annealing for high-performance planar perovskite solar cells

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Publication details

The article was received on 06 Oct 2016, accepted on 14 Oct 2016, published on 14 Oct 2016 and first published online on 14 Oct 2016


Article type: Communication
DOI: 10.1039/C6TA08655A
Citation: J. Mater. Chem. A, 2016,4, 17267-17273
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    Room-temperature water-vapor annealing for high-performance planar perovskite solar cells

    B. Wang, Z. Zhang, S. Ye, H. Rao, Z. Bian, C. Huang and Y. Li, J. Mater. Chem. A, 2016, 4, 17267
    DOI: 10.1039/C6TA08655A

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