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Antimony oxide buffer layer for single- and double-junction perovskite-based solar cells
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DOI：10.1038/s41467-026-70848-8.png)
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Abstract
En 中文
Atomic layer-deposited tin oxide serves as an effective buffer layer in perovskite/silicon tandem solar cells due to its efficient charge extraction and sputtering tolerance. Nevertheless, its unavoidable chemical erosion effect of atomic layer-deposited tin oxide on perovskite requires thicker fullerene charge transport layers, leading to increased parasitic optical absorption. Herein, we firstly integrated thermal evaporated antimony oxide into solar cells to effectively replace atomic layer-deposited tin oxide, enabling a thinner fullerene to minimize optical losses and prevent damage to the perovskite. The unique amorphous-nanocrystalline structure of, antimony oxide facilitates ultrafast carrier transport via its embedded nanocrystalline network. The antimony oxide-based tandem solar cells demonstrated a significant improvement in power conversion efficiency compared to tin oxide-based devices, primarily due to an enhanced short-circuit current density of approximately 1 mA/cm² in the perovskite top cell. Remarkably, even at 64.64 cm2 scale, the antimony oxide-based encapsulated large-area tandem solar cell retains an efficiency of 28.16% (with a certified value of 27.70%), attesting the scalability of this approach. Perovskite–silicon solar cells rely on buffer layers that avoid damaging the perovskite, but common tin-oxide layers force thicker transport layers that increase optical loss. The authors replace this layer with thermally evaporated antimony oxide, enabling thinner C60 and higher-efficiency perovskite–silicon solar cells.
Keywords:
Solar cells
Science
Humanities and Social Sciences
multidisciplinary
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