Rational Design of Two Well‐Compatible Dimeric Acceptors Through Regulating Chalcogen‐Substituted Conjugated Backbone Enable Ternary Organic Solar Cells with 19.4% Efficiency

IF 24.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Wanying Feng, Yuyang Bai, Jia Wang, Yanyi Zhong, Jiaying Wang, Tianqi Chen, Jiangbin Zhang, Kai Han, Xiangjian Wan, Bin Kan, Yongsheng Chen
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引用次数: 0

Abstract

To enhance the performance of dimeric acceptors (DMAs) based organic solar cells (OSCs), two new DMAs, designated as DC9‐HD and DYSe‐3, are rationally developed and employed to fabricate ternary OSCs. The substitution of the sulfur atom on the outer ring of the fused‐ring core of DC9‐HD with a selenium atom resultes in the red‐shifted DYSe‐3. Despite these minor differences, DC9‐HD and DYSe‐3 possess nearly identical conjugated skeletons, which contribute to their similar packing motifs and crystallinities, ultimately enabling a high degree of miscibility between two DMAs. Upon incorporating DYSe‐3 into the host PM6:DC9‐HD binary blend, fibril‐like morphologies featured with diameters of ≈16.9 nm and reduced charge recombination are observed in the PM6:DC9‐HD:DYSe‐3 ternary blend. More importantly, owing to their long exciton diffusion lengths and low voltage losses, a remarkable power conversion efficiency of 19.4% is achieved for the ternary OSCs, alongside a delicate balance between open‐circuit voltage and short‐circuit current density. This super result is comparable to the best performance of oligomer acceptor based OSCs reported to date. Furthermore, the proposed ternary strategy, which combines one polymer donor and two well‐compatible DMAs, not only retains the advantages of DMAs but also offers a streamlined approach for fabricating high‐performance ternary OSCs.
通过调节查耳根取代共轭骨架合理设计两种兼容性良好的二聚受体,使三元有机太阳能电池的效率达到 19.4
为了提高基于二聚受体(DMAs)的有机太阳能电池(OSCs)的性能,我们合理地开发了两种新的二聚受体,即 DC9-HD 和 DYSe-3,并将其用于制造三元有机太阳能电池。用硒原子取代 DC9-HD 熔合环核心外环上的硫原子后,产生了红移 DYSe-3。尽管存在这些细微差别,DC9-HD 和 DYSe-3 仍具有几乎相同的共轭骨架,这有助于它们形成相似的包装图案和结晶,最终使两种 DMA 具有高度的混溶性。将 DYSe-3 加入 PM6:DC9-HD 二元共混物中后,PM6:DC9-HD:DYSe-3 三元共混物中出现了直径≈16.9 纳米的纤维状形态,电荷重组现象也有所减少。更重要的是,由于其长激子扩散长度和低电压损耗,在开路电压和短路电流密度之间取得微妙平衡的同时,三元 OSC 还实现了 19.4% 的出色功率转换效率。这一超级成果与迄今为止报道的基于低聚物受体的 OSC 的最佳性能不相上下。此外,所提出的三元策略结合了一种聚合物供体和两种相容性良好的 DMA,不仅保留了 DMA 的优点,还为制造高性能三元 OSC 提供了一种简化方法。
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来源期刊
Advanced Energy Materials
Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
41.90
自引率
4.00%
发文量
889
审稿时长
1.4 months
期刊介绍: Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.
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