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Templated microstructural growth of perovskite thin films via colloidal monolayer lithography

Hörantner, M. T., Zhang, Wei, Saliba, M., Wojciechowski, K. and Snaith, H. J. (2015) Templated microstructural growth of perovskite thin films via colloidal monolayer lithography Energy and Environmental Science, 8 (7). pp. 2041-2047.

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Abstract

Organic–inorganic metal halide perovskites have led to remarkable advancements in emerging photovoltaics with power conversion efficiencies (PCEs) already achieving 20%. In addition to solar cells, these perovskites also show applicability for lasing and LED applications. Here, we control perovskite crystal domain size and microstructure by guiding the growth through a highly ordered metal oxide honeycomb structure, which we form via colloidal monolayer lithography. The organic–inorganic perovskite material fills the holes of the honeycomb remarkably well leading to fully controlled domain size with tuneable film thickness. The honeycomb region is predominantly transparent, whereas the perovskite crystals within the honeycomb are strongly absorbing. We fabricate semi-transparent perovskite solar cells to demonstrate the feasibility of this structuring, which leads to enhanced open-circuit voltage and fill factor in comparison to unstructured partially dewet perovskite thin films. We achieve power conversion efficiencies of up to 9.5% with an average visible transmittance through the active layer of around 37%. The controlled microscopic morphology of perovskite films opens up a wide range of possible investigations, from charge transport optimization to optical enhancements and photonic structuring for photovoltaic, light emitting and lasing devices.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Electronic Engineering
Authors :
NameEmailORCID
Hörantner, M. T.UNSPECIFIEDUNSPECIFIED
Zhang, Weiwz0003@surrey.ac.ukUNSPECIFIED
Saliba, M.UNSPECIFIEDUNSPECIFIED
Wojciechowski, K.UNSPECIFIEDUNSPECIFIED
Snaith, H. J.UNSPECIFIEDUNSPECIFIED
Date : 28 May 2015
Identification Number : 10.1039/C5EE01169H
Copyright Disclaimer : © The Royal Society of Chemistry 2015
Depositing User : Clive Harris
Date Deposited : 01 Jun 2017 12:23
Last Modified : 05 Jun 2017 09:38
URI: http://epubs.surrey.ac.uk/id/eprint/841264

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