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A chemically inert bismuth interlayer enhances long-term stability of inverted perovskite solar cells.

Abstract：

:Long-term stability remains a key issue impeding the commercialization of halide perovskite solar cells (HPVKSCs). The diffusion of molecules and ions causes irreversible degradation to photovoltaic device performance. Here, we demonstrate a facile strategy for producing highly stable HPVKSCs by using a thin but compact semimetal Bismuth interlayer. The Bismuth film acts as a robust permeation barrier that both insulates the perovskite from intrusion by undesirable external moisture and protects the metal electrode from iodine corrosion. The Bismuth-interlayer-based devices exhibit greatly improved stability when subjected to humidity, thermal and light stresses. The unencapsulated device retains 88% of its initial efficiency in ambient air in the dark for over 6000 h; the devices maintain 95% and 97% of their initial efficiencies after 85 °C thermal aging and light soaking in nitrogen atmosphere for 500 h, respectively. These sound stability parameters are among the best for planar structured HPVKSCs reported to date.

journal_name

Nat Commun

journal_title

Nature communications

authors

Wu S,Chen R,Zhang S,Babu BH,Yue Y,Zhu H,Yang Z,Chen C,Chen W,Huang Y,Fang S,Liu T,Han L,Chen W

doi

10.1038/s41467-019-09167-0

subject

Has Abstract

pub_date

2019-03-11 00:00:00

pages

1161

issue

1

issn

2041-1723

pii

10.1038/s41467-019-09167-0

journal_volume

10

pub_type

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