近日，武汉大学王植平团队研究了高效、光热稳定的钙钛矿太阳能电池的氧化铪界面稳定。该项研究成果发表在2026年2月26日出版的《科学》杂志上。

空穴选择界面和电子选择界面处的有机分子层是实现高效钙钛矿太阳能电池的关键，但其有限的光热稳定性制约了器件的长期运行。研究组采用原子层沉积技术制备氧化铪（HfO_x）中间层，以稳定这些分子界面在工况条件下的稳定性。在NiO_x/自组装单层（SAM）界面处，富含羟基的Lewis酸性n-HfO_x层（n表示负固定电荷极性）促进了三齿膦酸的配位作用，增强了SAM的保留率和热稳定性。

在钙钛矿/C₆₀界面处，p-HfO_x层（p表示正固定电荷极性）通过Hf…F相互作用锚定3-氟苯乙基碘化铵（3F-PEAI），该相互作用同时起到了阻挡卤化物离子和银离子迁移的扩散势垒作用。器件实现了27.1%的光电转换效率（认证值为26.6%），在85°C环境空气中、相当于1个太阳的光照条件下运行约5000小时后，仍保持初始效率的90%以上。

附：英文原文

Title: Hafnium oxide interface stabilization for efficient, photothermally stable perovskite solar cells

Author: Yuanhang Yang, Siyang Cheng, Xiaotian Yang, Mubai Li, Xueliang Zhu, Zhongji Yang, Yixuan Zheng, Yong Liu, Qianqian Lin, Ning Yan, Shengjun Yuan, Zhiping Wang

Issue&Volume: 2026-02-26

Abstract: Organic molecular layers at both hole- and electron-selective interfaces are essential for achieving high-efficiency perovskite solar cells, yet their limited photothermal stability hinders long-term device operation. We used atomic layer deposition to deposit hafnium oxide (HfOx) interlayers to stabilize these molecular interfaces under operational stress. At the NiOx/self-assembled monolayer (SAM) interface, a hydroxyl-rich, Lewis-acidic n-HfOx layer (n denotes negative fixed-charge polarity) promoted tridentate phosphonic acid coordination and enhanced SAM retention and thermal durability. At the perovskite/C60 interface, the p-HfOx layer (p denotes positive fixed-charge polarity) anchored 3-fluorophenylethylammonium iodide (3F-PEAI) through HfF interactions that also acted as a diffusion barrier against halide- and silver-ion migration. Devices achieved a power conversion efficiency of 27.1% (26.6% certified) and retained more than 90% of their initial efficiency for ~5000 hours under 1-sun equivalent illumination at 85°C in ambient air.

DOI: aea3339

Source: https://www.science.org/doi/10.1126/science.aea3339