Zhang Ming, Wang Zaiyu, Zhu Lei, Zeng Rui, Xue Xiaonan, Liu Sha, Yan Jun, Yang Zhiyuan, Zhong Wenkai, Zhou Guanqing, Kan Lixuan, Xu Jinqiu, Zhang Anyang, Deng Jiawei, Zhou Zichun, Song Jingnan, Jing Hao, Xu Shengjie, Zhang Yongming, Liu Feng
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, Center of Hydrogen Science, In situ Center of Physical Science, Shanghai Jiao Tong University, Shanghai, 200240, P. R. China.
Suzhou Laboratory, Suzhou, 215100, P. R. China.
Adv Mater. 2024 Dec;36(52):e2407297. doi: 10.1002/adma.202407297. Epub 2024 Oct 7.
A novel approach for depositing the giant molecule acceptor (GMA) at the donor-acceptor interface to enhance the efficiency and stability of organic photovoltaic (OPV) devices through a designed interface-enhanced layer-by-layer device fabrication protocol is proposed. The giant molecule acceptor DQx-Ph is mixed with the polymer donor in the bottom layer to form a polymer donor fibril phase and a mixed phase, followed by subsequent deposition of the main acceptor L8-BO. The L8-BO solution swells the bottom layer and alters the localized morphology of the mixing phase, introducing L8-BO fibrillar crystallization and pushing DQx-Ph giant molecules outwards to the fibril interfaces. Through this approach, the localized morphology and optoelectronic property of the bulk heterojunction are optimized. This configuration maintains the superior transport properties of L8-BO while integrating the high open-circuit voltage characteristics of DQx-Ph. Additionally, exciton dissociation and charge generation are simultaneously enhanced, with suppressed energy losses. A power conversion efficiency of 19.9% with improved operational stability is achieved, underscoring the importance of GMA interface jamming in advancing OPV technology. This study provides new insights into the development of ancillary OPV materials to overcome the critical limitations in OPV, revealing innovative approaches for photovoltaic technologies.
提出了一种通过设计界面增强的逐层器件制造协议，在供体-受体界面沉积巨分子受体（GMA）以提高有机光伏（OPV）器件效率和稳定性的新方法。巨分子受体DQx-Ph与聚合物供体在底层混合，形成聚合物供体原纤维相和混合相，随后沉积主要受体L8-BO。L8-BO溶液使底层膨胀并改变混合相的局部形态，引入L8-BO原纤维结晶，并将DQx-Ph巨分子向外推至原纤维界面。通过这种方法，优化了本体异质结的局部形态和光电性能。这种结构在保持L8-BO优异传输性能的同时，整合了DQx-Ph的高开路电压特性。此外，激子解离和电荷产生同时增强，能量损失得到抑制。实现了19.9%的功率转换效率并提高了运行稳定性，突出了GMA界面干扰在推进OPV技术中的重要性。本研究为开发辅助OPV材料以克服OPV中的关键限制提供了新见解，揭示了光伏技术的创新方法。
