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Issue 4, 2016
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Achieving long-term stable perovskite solar cells via ion neutralization

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Abstract

Despite recent reports of high power conversion efficiency (PCE) values of over 20%, the instability of perovskite solar cells (PSCs) has been considered the most serious obstacle toward their commercialization. By rigorously exploring the self-degradation process of planar-type PSCs using typical metal electrodes (Ag or Al), we found that the corrosion of the metal electrodes by inherent ionic defects in the perovskite layers is a major origin of intrinsic device degradation even under inert conditions. In this work, we have developed a new concept of a chemical inhibition in PSCs using amine-mediated metal oxide systems and succeeded in chemically neutralizing mobile ionic defects through mutual ionic interaction. As a consequence, we realized planar-type PSCs with long-term stability that maintain nearly 80% of their initial PCEs even after 1 year (9000 h) of storage under nitrogen and 80% of their initial PCEs after 200 h in ambient conditions without any encapsulation.

Graphical abstract: Achieving long-term stable perovskite solar cells via ion neutralization

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Supplementary files

Article information


Submitted
26 Feb 2016
Accepted
18 Mar 2016
First published
18 Mar 2016

Energy Environ. Sci., 2016,9, 1258-1263
Article type
Communication

Achieving long-term stable perovskite solar cells via ion neutralization

H. Back, G. Kim, J. Kim, J. Kong, T. K. Kim, H. Kang, H. Kim, J. Lee, S. Lee and K. Lee, Energy Environ. Sci., 2016, 9, 1258
DOI: 10.1039/C6EE00612D

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