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Metal chalcogenide electron extraction layers for nip-type tin-based perovskite solar cells
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Journal Article
Metal chalcogenide electron extraction layers for nip-type tin-based perovskite solar cells
2024
Overview
Tin-based perovskite solar cells have garnered attention for their biocompatibility, narrow bandgap, and long thermal carrier lifetime. However,
nip
-type tin-based perovskite solar cells have underperformed largely due to the indiscriminate use of metal oxide electron transport layers originally designed for
nip
-type lead-based perovskite solar cells. Here, we reveal that this underperformance is caused by oxygen vacancies and deeper energy levels in metal oxide. To address these issues, we propose a metal chalcogenide electron transport layer, specifically Sn(S
0.92
Se
0.08
)
2
, which circumvents the oxygen molecules desorption and impedes the Sn
2+
oxidation. As a result, tin-based perovskite solar cells with Sn(S
0.92
Se
0.08
)
2
demonstrate a
V
OC
increase from 0.48 – 0.73 V and a power conversion efficiency boost from 6.98 – 11.78%. Additionally, these cells exhibit improved stability, retaining over 95% of their initial efficiency after 1632 h. Our findings showcase metal chalcogenides as promising candidates for future
nip
-type tin-based perovskite solar cell applications.
nip-Type tin-based perovskite solar cells have underperformed largely due to the metal oxide electron transport layers originally designed for lead-based devices. Here, authors employ metal chalcogenide as the electron transport layer, achieving enhanced efficiency up to 11.78% for stable devices.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 147/135
/ 147/3
/ Energy conversion efficiency
/ Humanities and Social Sciences
/ Metals
/ Oxygen
/ Science
/ Tin
