近日，中国科学院福建物质结构研究所王要兵团队研究了12.1%效率的耦合有机太阳能电池。相关论文于2025年6月10日发表在《美国化学会志》上。

耦合太阳能电池能够实现直接的太阳能到电化学能量存储，但由于太阳能光谱利用不足，效率较低。研究组报告了用于广谱、高效、耦合有机太阳能电池的分子光电化学材料上的激子耦合氧化还原反应。对分子材料进行预筛选，使氧化还原电位与可见光光电压相匹配，以利用带边激子。强供体-受体结构与外部离子极化的结合使超带隙激子在紫外光下能够进行热激子氧化还原反应，而光热分子基序的引入进一步实现了光热激子-光子耦合的带内近红外能量利用。 

在全光谱照明下，实现了12.1%的创纪录的太阳能电化学储能效率和0.93 V下11.2 mA cm^-2的交换光电流。所制造的可扩展（约200 cm²）串联装置在自然阳光下的长期稳定运行进一步证明了耦合有机太阳能电池作为商业上可行的实际应用系统的潜力。

附：英文原文

Title: A Coupled Organic Solar Battery with 12.1% Efficiency

Author: Xiang Zhang, Lei Jiao, Weiqiang Guo, Zhiwei Xiao, Enbo Zhou, Yan-Xi Tan, Yangyang Feng, Daqiang Yuan, Yaobing Wang

Issue&Volume: June 10, 2025

Abstract: Coupled solar batteries enable direct solar-to-electrochemical energy storage but show low efficiencies due to insufficient solar spectrum utilization. Here, we report the exciton-coupled redox reactions over molecular photoelectrochemical materials for wide-spectrum, high-efficiency, coupled organic solar batteries. The molecular materials are prescreened to match the redox potential with visible light photovoltage for band-edge excitons utilization. The combination of strong donor–acceptor structure with external ion polarization enables long-lived superband gap excitons under ultraviolet light for hot exciton redox reactions, while the incorporation of photothermal molecular motifs further realizes in-band near-infrared energy utilization by the photothermal exciton–photon coupling. A record-high solar-to-electrochemical energy storage efficiency of 12.1% and an exchange photocurrent of 11.2 mA cm–2 at 0.93 V were achieved under full-spectrum illumination. The long-term stable operation of the manufactured upscalable (～200 cm2) tandem device under natural sunlight further demonstrates the potential of coupled organic solar batteries as a commercially viable system for practical applications.

DOI: 10.1021/jacs.5c00662

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c00662