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在全球能源结构向碳中和转型的宏大背景下,光伏技术作为最经济、最清洁的可再生能源形式,正经历从晶硅时代向薄膜叠层时代的战略跨越。金属卤化物钙钛矿太阳能电池(PSCs)凭借其卓越的光电特性、低成本溶液加工优势以及快速攀升的能量转换效率,已成为下一代光伏技术的绝对核心。然而,钙钛矿材料本质上的离子特性使其在面对热、光、湿等外部应力时表现出显著的不稳定性,特别是电荷传输界面处的能级失配、缺陷辅助复合以及离子迁移,始终是制约其商业化进程的“阿喀琉斯之踵”。

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    在全球能源结构向碳中和转型的宏大背景下,光伏技术作为最经济、最清洁的可再生能源形式,正经历从晶硅时代向薄膜叠层时代的战略跨越。金属卤化物钙钛矿太阳能电池(PSCs)凭借其卓越的光电特性、低成本溶液加工优势以及快速攀升的能量转换效率,已成为下一代光伏技术的绝对核心。然而,钙钛矿材料本质上的离子特性使其在面对热、光、湿等外部应力时表现出显著的不稳定性,特别是电荷传输界面处的能级失配、缺陷辅助复合以及离子迁移,始终是制约其商业化进程的“阿喀琉斯之踵”。

    . 贵金属可给太阳能电池当“防晒霜”. 科技导报, 2026 , 44 (5) : 8 -8 .
    . Science & Technology Review, 2026 , 44 (5) : 8 -8 .
    在全球能源结构向碳中和转型的宏大背景下,光伏技术作为最经济、最清洁的可再生能源形式,正经历从晶硅时代向薄膜叠层时代的战略跨越。金属卤化物钙钛矿太阳能电池(PSCs)凭借其卓越的光电特性、低成本溶液加工优势以及快速攀升的能量转换效率,已成为下一代光伏技术的绝对核心。然而,钙钛矿材料本质上的离子特性使其在面对热、光、湿等外部应力时表现出显著的不稳定性,特别是电荷传输界面处的能级失配、缺陷辅助复合以及离子迁移,始终是制约其商业化进程的“阿喀琉斯之踵”。
    武汉大学物理科学与技术学院教授王植平课题组在高效、稳定钙钛矿太阳能电池领域取得重要进展,他们提出一种“原子尺度界面键合”技术,采用原子层沉积工艺,在电池内部关键界面引入可调控的氧化铪(HfOx)中间层,从原子尺度上同步稳定空穴与电子传输界面,成功解决了长期制约钙钛矿太阳能电池发展的效率与稳定性难以协同提升的难题。2026年2月26日,相关研究成果发表于《Science》。
    实现光电器件的高效稳定运行,关键在于构建牢固、可靠的电荷传输界面。当前高性能钙钛矿电池普遍采用有机分子层进行界面修饰,然而该类材料在持续光照与高温环境下稳定性不足,易引发性能衰减,制约了器件的实际应用寿命。
    针对这一挑战,研究团队发展的原子尺度界面键合技术,利用原子层沉积工艺在空穴传输层界面制备了经过退火处理的n型HfOx中间层。该层富含羟基并呈现路易斯酸性,可与自组装分子形成强度更高的三齿配位结构,在原子尺度实现了界面分子的牢固键合,显著提升了界面的热稳定性和机械附着力。在电子传输层一侧,p型HfOx中间层则通过强的Hf···F键合作用锚定钝化分子,有效抑制了其在高温下的脱附,并阻断了碘离子向金属电极的迁移,从源头上延缓了器件性能的衰退。
    基于该技术制备的p-i-n型钙钛矿太阳能电池获得了27.1%的功率转换效率,并在85℃、持续1个太阳光照条件下运行超过5000 h后,仍能保持初始效率90% 以上的性能,其高温工作寿命达到对照器件的25倍。
    尽管前景广阔,但该技术迈向大规模商业化仍面临资源与工程的双重挑战。首先,铪资源在全球范围内相对稀缺,且受航空和电子行业需求影响,其价格波动剧烈,对光伏组件的长效成本管控提出了更高要求。其次,尽管ALD工艺与现有半导体产线高度兼容,但在GW级光伏产线上实现大面积、高通量的原子层均匀沉积,仍存在较大的工程优化空间。此外,钙钛矿材料中铅成分的全生命周期无害化回收体系也有待建立,以确保这项绿色技术的底色更加环保。
    (综合:《Science》、武汉大学官网)

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    2种不同金属材料的力学参数

    Family
    属数
    Number of
    genus
    种数
    Number of
    species
    占总种数比例
    Percentage of
    total species (%)

    Genus
    种数
    Number of
    species
    占总种数比例
    Percentage of total
    species (%)
    鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
    小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
    多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
    红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
    小菇属 Mycena 11 5.26
    光柄菇属 Pluteus 5 2.39
    红菇属 Russula 17 8.13
    栓菌属 Trametes 5 2.39
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