Bi Zhaozhao, Wu Baohua, Wang Ke, Xue Jingwei, Liu Chang, Tang Lingxiao, Zhou Ke, Jiang Long, Ma Wei
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
Tubular Goods Research Institute of CNPC, Xi'an, 710049, China.
Adv Sci (Weinh). 2025 Jul;12(27):e2502077. doi: 10.1002/advs.202502077. Epub 2025 Apr 26.
Solution-processable organic solar cells (OSCs) represent a promising renewable photovoltaic technology with significant potential for eco-compatible production. While high power conversion efficiencies (PCEs) have been achieved in OSCs, scaling this technology for high-throughput manufacturing remains challenging. Key reason lies in the lack of efficient control strategies for the complex and long-duration morphology evolution during high-speed coating process with ecofriendly solvents. Here, a donor-priority rapid aggregation process (DP-RAP) scheme is proposed to solve this issue by adjusting the aggregation kinetics of donor and acceptor components. DP-RAP enables blends with a nanoscale fiber network structure and favorable crystallinity, which contributes to balanced carrier transport and reduced recombination losses. As a result, the PCE is improved from 14.3% (reference) to 17.4% (DP-RAP) for ultra-high speed coated PM6:BTP-eC9 devices in atmosphere, which is one of the highest values for non-halogenated solvent-processed solar cells at coating speeds of 500 mm s. Moreover, the DP-RAP based devices remain a stable PCE of approximately 17.4% across a broad range of coating speeds (20-500 mm s), illustrating its tolerance to the varied manufacturing conditions. This work highlights a promising avenue for the high-speed, ecofriendly production of efficient OSCs, pushing the boundaries of practical manufacturing in renewable energy technologies.
溶液可加工有机太阳能电池（OSCs）是一种很有前景的可再生光伏技术，在生态兼容生产方面具有巨大潜力。虽然有机太阳能电池已实现了高功率转换效率（PCEs），但将该技术扩大规模用于高通量制造仍具有挑战性。关键原因在于，在使用环保溶剂的高速涂布过程中，缺乏对复杂且持续时间长的形态演变的有效控制策略。在此，提出了一种供体优先快速聚集过程（DP-RAP）方案，通过调整供体和受体组分的聚集动力学来解决这一问题。DP-RAP使共混物具有纳米级纤维网络结构和良好的结晶度，这有助于实现平衡的载流子传输并减少复合损失。结果，对于在大气中以超高速涂布的PM6:BTP-eC9器件，功率转换效率从14.3%（参考值）提高到了17.4%（DP-RAP），这是在500毫米/秒的涂布速度下非卤化溶剂处理太阳能电池的最高值之一。此外，基于DP-RAP的器件在很宽的涂布速度范围（20 - 500毫米/秒）内保持约17.4%的稳定功率转换效率，这表明其对不同制造条件的耐受性。这项工作为高效有机太阳能电池的高速、环保生产开辟了一条很有前景的途径，推动了可再生能源技术实际制造的边界。
