Unlocking 27.3% perovskite photovoltaics by interface-locked dual-molecule contact

IF 13.9 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Advances Pub Date : 2026-07-01 DOI:10.1126/sciadv.aeg1456

Zuolin Zhang, Mengjia Li, Jike Ding, Yunxiao Liao, Hao Liu, Yong Ding, Boxin Jiao, Jiang Sheng, Feng Yan, Jiangzhao Chen, Cong Chen

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Abstract

Inverted perovskite solar cells (PSCs) remain constrained by nickel ion (Ni³⁺)–triggered interfacial redox chemistry and buried-interface defect landscapes that drive nonradiative loss and undermine operational stability. We report an interface-locked dual-molecule contact by coassembling [4-(3,6-dimethyl-9H-carbazol-9-yl)butyl]phosphonic acid (Me-4PACz) with 9H-carbazol-2-yl trifluoromethanesulfonate (CzOTf), in which π-π–stabilized cofacial packing rigidifies molecular orientation and strengthens interfacial electronic coupling for efficient hole extraction, whereas the sulfonate terminus offers broader lead (Pb)–related defect coordination and relieves interfacial tensile stress, collectively promoting higher-quality crystallization and a chemically stabilized buried interface. Enabled by this synergistic regulation, vacuum-flash-evaporated 1.53–electron volt PSCs deliver certified efficiencies up to 27.31%. The strategy also translates to perovskite/HJT-Si (silicon heterojunction) tandems with an efficiency of 32.84%. Furthermore, the corresponding 766–square centimeter large-area module achieved a power conversion efficiency of 21.54%. The CzOTf-modulated PSCs retain 92% of their initial efficiency after 2000 hours of continuous light soaking (ISOS-L-1). The CzOTf-modulated large-area module operated stably outdoors for 35 days without degradation.

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通过界面锁定双分子接触解锁27.3%钙钛矿光伏

反向钙钛矿太阳能电池（PSCs）仍然受到镍离子（Ni 3+）触发的界面氧化还原化学和埋藏界面缺陷的限制，这些缺陷会导致非辐射损失并破坏运行稳定性。我们通过将[4-（3,6-二甲基-9 H -卡巴唑-9-酰基）丁基]膦酸（Me-4PACz）与9 H -卡巴唑-2-酰基三氟甲烷磺酸（CzOTf）共组装形成界面锁定的双分子接触，其中π-π稳定的共面填充固化了分子取向并加强了界面电子耦合，从而实现了高效的空穴提取，而磺酸端提供了更广泛的铅（Pb）相关缺陷配位并减轻了界面拉应力。共同促进更高质量的结晶和化学稳定的埋藏界面。通过这种协同调节，真空闪蒸1.53电子伏的psc可提供高达27.31%的认证效率。该策略还转化为钙钛矿/HJT-Si（硅异质结）串联，效率为32.84%。相应的766平方厘米大面积模块的功率转换效率达到21.54%。czotf调制的psc在连续光浸泡2000小时后保持92%的初始效率（iso - l -1）。czotf调制的大面积模块在室外稳定运行了35天，没有退化。

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来源期刊

Science Advances 综合性期刊-综合性期刊

CiteScore

21.40

自引率

1.50%

发文量

1937

审稿时长

29 weeks

期刊介绍： Science Advances, an open-access journal by AAAS, publishes impactful research in diverse scientific areas. It aims for fair, fast, and expert peer review, providing freely accessible research to readers. Led by distinguished scientists, the journal supports AAAS's mission by extending Science magazine's capacity to identify and promote significant advances. Evolving digital publishing technologies play a crucial role in advancing AAAS's global mission for science communication and benefitting humankind.