AI Article Synopsis
- * Initial power conversion efficiency was measured at 15.86%, but this dropped to 10.20% within 2 days due to harmful migration of oxygen and silver at the interface.
- * The research addresses this problem by adding a chromium oxide (CrO) layer between MoO₃ and the silver electrode, leading to improved stability of the solar cells for over 8 months in air.
Article Abstract
Molybdenum oxide (MoO, < 3) has been successfully demonstrated as an efficient passivating hole-selective contact in crystalline Si (-Si) heterojunction solar cells because of its large bandgap (∼3.2 eV) and work function (∼6.9 eV). However, the severe performance degradation coming from the instability of the MoO and its interfaces has not been well addressed. In this work, we started with a -Si()/MoO heterojunction solar cell that yielded a power conversion efficiency () of 15.86%, in which the MoO film was synthesized by industry-compatible atomic layer deposition (ALD). The initial dropped to 10.20% after 2 days because of severe migration of O and Ag at the MoO/Ag interface. We solved this by the insertion of a CrO layer between the MoO layer and the Ag electrode. The solar cell was found to be stable for more than 8 months in air because of the suppression of interface degradation. Our work demonstrates an effective way of improving the stability of silicon solar cells with transition metal oxide carrier selective contacts.
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| http://dx.doi.org/10.1021/acsami.0c09877 | DOI Listing |
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