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Selective growth of layered perovskite for stable and efficient photovoltaics.

Abstract

Perovskite solar cells (PSCs) are promising alternatives toward clean energy because of their high-power conversion efficiency (PCE) and low materials and processing cost. However, their poor stability under operation is still limiting practical applications. Here we design an innovative approach to control the surface growth of a low dimensional perovskite layer on top of a bulk three-dimensional (3D) perovskite film. This results in a structured perovskite interface where a distinct layered low dimensional perovskite is engineered on top of the 3D. Structural and optical properties of the stack are investigated and solar cells realized. When embodying the low dimensional perovskite layer, the photovoltaic cells exhibit an enhanced PCE of 20.1% on average, when compared to pristine 3D perovskite. In addition, superior stability is observed: the devices retain 85% of the initial PCE stressed under one sun illumination for 800 hours at 50°C in ambient environment.

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Supplementary files

Publication details

The article was received on 11 Dec 2017, accepted on 06 Feb 2018 and first published on 08 Feb 2018


Article type: Paper
DOI: 10.1039/C7EE03513F
Citation: Energy Environ. Sci., 2018, Accepted Manuscript
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    Selective growth of layered perovskite for stable and efficient photovoltaics.

    K. T. Cho, G. Grancini, Y. Lee, E. Oveisi , J. Ryu, O. Almora, M. Tschumi, P. Schouwink, G. Seo, S. heo, J. Park, J. Jang, S. Paek, G. Garcia-Belmonte and M. K. Nazeeruddin, Energy Environ. Sci., 2018, Accepted Manuscript , DOI: 10.1039/C7EE03513F

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