Ambient fabrication of over 19% efficient organic solar cells via spontaneous water-spreading and layer-by-layer deposition

IF 7.7 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Science China Materials Pub Date : 2026-06-05 DOI:10.1007/s40843-026-4109-2

Yetai Cheng (, ), Xing Yan (, ), Yueheng Liu (, ), Yonghuan Li (, ), Ya-Nan Chen (, ), Zhengdong Wei (, ), Guangliu Ran (, ), Hao Lu (, ), Wenkai Zhang (, ), Zhishan Bo (, ), Yahui Liu (, )

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Abstract

Currently, the fabrication of high-efficiency organic solar cells (OSCs) under ambient conditions remains a formidable challenge. We proposed an innovative approach for air-processed devices that combines spontaneous water-spreading film formation with layer-by-layer (LBL) deposition. Furthermore, we fabricated donor- and acceptor-dominant bulk heterojunction blend films near the anode and cathode interfacial layers using the LBL technique. This structure optimizes the vertical phase separation morphology of the active layer and enhances the charge transfer efficiency. In the D18:L8-BO system, the device achieves a power conversion efficiency (PCE) of 19.02%, with an exceptionally narrow efficiency distribution range. Even for devices with an area of 1 cm², a PCE of 16.56% is still attained. After undergoing a 1000-hour decay test, the efficiency retains 84.1%. This novel method offers a promising pathway for advancing the industrial application of large-area, highly stable devices with narrow efficiency distribution under ambient conditions.

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通过自发水扩散和逐层沉积，在环境中制造效率超过19%的有机太阳能电池

目前，在环境条件下制造高效有机太阳能电池（OSCs）仍然是一个艰巨的挑战。我们提出了一种将自发水扩散膜形成与逐层沉积（LBL）相结合的空气处理装置的创新方法。此外，我们利用LBL技术在阳极和阴极界面层附近制备了供体和受体为主的体异质结共混膜。这种结构优化了活性层的垂直相分离形态，提高了电荷转移效率。在D18:L8-BO系统中，器件的功率转换效率（PCE）为19.02%，效率分布范围非常窄。即使对于面积为1 cm2的设备，PCE仍可达到16.56%。经过1000小时的衰减试验，效率保持在84.1%。这种新方法为推进环境条件下效率分布窄的大面积高稳定器件的工业应用提供了一条有希望的途径。

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来源期刊

Science China Materials Materials Science-General Materials Science

CiteScore

11.40

自引率

7.40%

发文量

949

期刊介绍： Science China Materials (SCM) is a globally peer-reviewed journal that covers all facets of materials science. It is supervised by the Chinese Academy of Sciences and co-sponsored by the Chinese Academy of Sciences and the National Natural Science Foundation of China. The journal is jointly published monthly in both printed and electronic forms by Science China Press and Springer. The aim of SCM is to encourage communication of high-quality, innovative research results at the cutting-edge interface of materials science with chemistry, physics, biology, and engineering. It focuses on breakthroughs from around the world and aims to become a world-leading academic journal for materials science.