引入融合环分子内供体-受体相互作用设计本质稳定的孔选择性自组装单层膜

IF 16.9 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Dr. Wenlin Jiang, Prof. Baobing Fan, Lingchen Kong, Dr. Ze-Fan Yao, Dr. Wansong Shang, Chun-To Wong, Dr. Francis R. Lin, Prof. Alex K.-Y. Jen
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引用次数: 0

摘要

以供电子共轭单元为头基的空穴选择性自组装单层(SAMs)在实现高性能有机太阳能电池(OSCs)方面取得了显著的成功。然而,这些分子的最低浅未占据分子轨道(LUMO)往往使它们对光降解敏感。为了解决这个问题,我们在SAM分子的设计中引入了融合环分子内供体-受体(D-A)相互作用,以降低LUMO水平。合成的分子JJ32显示出增强的光稳定性和分子间相互作用。此外,融合环分子内的D-A相互作用也有助于稳定JJ32的自由基阳离子状态,从而显著提高氧化还原稳定性。这使得它们能够被包含在多金属氧酸盐(POM)基复合孔选择层(hsl)中,从而获得19.62%的效率,同时显著提高相应osc的稳定性。本研究不仅验证了使用融合环d- a结构的SAM来提高OSCs效率和稳定性的概念,而且阐明了SAM结构与POM掺杂行为之间的关系,为高性能OSCs设计本质稳定的SAM分子提供了有效的策略。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Design of Intrinsically Stable Hole-Selective Self-Assembled Monolayers by Introducing Fused-Ring Intramolecular Donor–Acceptor Interactions

Design of Intrinsically Stable Hole-Selective Self-Assembled Monolayers by Introducing Fused-Ring Intramolecular Donor–Acceptor Interactions

Hole-selective self-assembled monolayers (SAMs) incorporating electron-donating conjugated units as head groups have witnessed remarkable success in helping achieve high-performance organic solar cells (OSCs). However, these molecules frequently exhibit a shallow lowest unoccupied molecular orbital (LUMO) level, rendering them prone to photodegradation. To tackle this problem, we introduce fused-ring intramolecular donor–acceptor (D–A) interactions into the design of SAM molecules to downshift the LUMO level. The resultant molecule, JJ32, shows both enhanced photostability and intermolecular interactions. Furthermore, the fused-ring intramolecular D–A interactions also help stabilize the radical cation state of JJ32 to result in significantly improved redox stability. This enables them to be included in polyoxometalate (POM)-based composite hole-selective layers (HSLs), resulting in an impressive efficiency of 19.85% alongside significantly enhanced stability in corresponding OSCs. This study not only validates the concept of using fused-ring D–A-structure SAMs to improve the efficiency and stability of OSCs but also elucidates the relationship between SAM structures and POM doping behaviors to provide an effective strategy in designing intrinsically stable SAM molecules for high-performance OSCs.

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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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