Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 17, 2020
Previous Article Next Article

Enhancing the operational stability of unencapsulated perovskite solar cells through Cu–Ag bilayer electrode incorporation

Author affiliations

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 electrode 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 (10 nm) below the Ag (100 nm) 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 provide insight into ageing related ion migration and structural reorganisation.

Graphical abstract: Enhancing the operational stability of unencapsulated perovskite solar cells through Cu–Ag bilayer electrode incorporation

Back to tab navigation

Supplementary files

Article information


Submitted
10 Feb 2020
Accepted
14 Apr 2020
First published
14 Apr 2020

J. Mater. Chem. A, 2020,8, 8684-8691
Article type
Paper

Enhancing the operational stability of unencapsulated perovskite solar cells through Cu–Ag bilayer electrode incorporation

C. Lin, J. Ngiam, B. Xu, Y. Chang, T. Du, T. J. Macdonald, J. R. Durrant and M. A. McLachlan, J. Mater. Chem. A, 2020, 8, 8684
DOI: 10.1039/D0TA01606C

Social activity

Search articles by author

Spotlight

Advertisements