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Issue 8, 2019
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Hybrid organic nanocrystal/carbon nanotube film electrodes for air- and photo-stable perovskite photovoltaics

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Abstract

We report on utilizing free-standing hybrid perylenediimide/carbon nanotube (PDI/CNT) films fabricated in air as back contacts for fully inorganic perovskite solar cells (glass/FTO/dense TiO2/mesoporous TiO2/CsPbBr3/back electrode). The back contact electrode connection is performed by film transfer rather than by vacuum deposition or by wet processing, allowing the formation of highly homogeneous contacts under ambient conditions. The use of this novel electrode in solar cells based on CsPbBr3 resulted in efficiency of 5.8% without a hole transporting layer; it is significantly improved in comparison to the reference cells with standard gold electrodes. Overall device fabrication can be performed on air, using inexpensive processing methods. The hybrid film electrodes dramatically improve the cell photo-stability under ambient conditions and under real-life operating conditions outdoors. The champion unencapsulated device demonstrated less than 30% efficiency loss over 6 weeks of outdoor aging in Negev desert conditions. The CNT/PDI electrodes offer the combination of fabrication simplicity, unique contacting approach, high efficiency and good operational stability for perovskite photovoltaics.

Graphical abstract: Hybrid organic nanocrystal/carbon nanotube film electrodes for air- and photo-stable perovskite photovoltaics

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Publication details

The article was received on 20 Nov 2018, accepted on 02 Feb 2019 and first published on 04 Feb 2019


Article type: Paper
DOI: 10.1039/C8NR09353A
Citation: Nanoscale, 2019,11, 3733-3740

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    Hybrid organic nanocrystal/carbon nanotube film electrodes for air- and photo-stable perovskite photovoltaics

    R. B. K. Siram, M. V. Khenkin, A. Niazov-Elkan, A. K. M., H. Weissman, E. A. Katz, I. Visoly-Fisher and B. Rybtchinski, Nanoscale, 2019, 11, 3733
    DOI: 10.1039/C8NR09353A

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