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Enhancing the operational stability of unencapsulated perovskite solar cells through Cu-Ag bilayer electrode incorporation
File | Description | Size | Format | |
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D0TA01606C Accepted Manuscript.pdf | Accepted version | 1.74 MB | Adobe PDF | View/Open |
Title: | Enhancing the operational stability of unencapsulated perovskite solar cells through Cu-Ag bilayer electrode incorporation |
Authors: | Lin, C-T Ngiam, J Xu, S Chang, Y-H Du, T Macdonald, TJ Durrant, J McLachlan, M |
Item Type: | Journal Article |
Abstract: | We identify a facile strategy that significantly reduces electrode corrosion and device degradation in unencapsulated perovskite solar cells (PSCs) operating in ambient air. By employing Cu-Ag bilayer top electrodes PSCs, we show enhanced operational lifetime compared with devices prepared from single metal (Al, Ag and Cu) analogues. Time-of-flight secondary ion mass spectrometry depth profiles indicate that the insertion of the thin layer of Cu (10nm) below the Ag (100nm) electrode significantly reduces diffusion of species originating in the perovskite active layer into the electron transport layer and electrode. X-ray diffraction (XRD) analysis reveals the mutually beneficial relationship between the bilayer metals, whereby the thermally evaporated Ag inhibits Cu oxidation and the Cu prevents interfacial reactions between the perovskite and Ag. The results here not only demonstrate a simple approach to prevent the electrode and device degradation that enhance lifetime and stability but also give an insight into ageing related ion migration and structural reorganisation. |
Issue Date: | 7-May-2020 |
Date of Acceptance: | 14-Apr-2020 |
URI: | http://hdl.handle.net/10044/1/78013 |
DOI: | 10.1039/d0ta01606c |
ISSN: | 2050-7488 |
Publisher: | Royal Society of Chemistry (RSC) |
Start Page: | 8684 |
End Page: | 8691 |
Journal / Book Title: | Journal of Materials Chemistry A |
Volume: | 8 |
Issue: | 17 |
Copyright Statement: | © Royal Society of Chemistry 2020 |
Keywords: | 0303 Macromolecular and Materials Chemistry 0912 Materials Engineering 0915 Interdisciplinary Engineering |
Publication Status: | Published |
Online Publication Date: | 2020-04-14 |
Appears in Collections: | Materials Chemistry Faculty of Natural Sciences Faculty of Engineering |