模型異質結界面合成揭示分子構型依賴的光誘導電荷轉移
作者：小柯機器人 發布時間：2024/8/22 16:20:07
本期文章：《自然—化學》：Online/在線發表
英國劍橋大學Bronstein, Hugo報道了模型異質結界面合成揭示分子構型依賴的光誘導電荷轉移。相關研究成果于2024年8月20日發表在國際頂尖學術期刊《自然—化學》。
控制有機異質結界面處的分子構型是開發高效光電器件的關鍵。由于難以表征這些埋藏和（可能）無序的異質界面，大多數系統中的界面結構仍然是一個謎。
該文中，研究人員展示了一種設計和控制模型接口的綜合策略，使其能夠與散裝材料隔離開來進行詳細研究。這是通過合成一種聚合物來實現的，其中非富勒烯受體部分使用雙烷基鏈共價鍵合到供體聚合物框架上，將受體和供體單元限制在貫穿空間的共面排列中?？梢哉{整受體相對于聚合物骨架中富電子和貧電子部分的約束幾何形狀，以控制電荷分離的動力學和由此產生的電荷轉移態的能量，從而深入了解控制有機異質結電荷產生的因素。
附：英文原文
Title: Synthesis of model heterojunction interfaces reveals molecular-configuration-dependent photoinduced charge transfer
Author: Royakkers, Jeroen, Yang, Hanbo, Gillett, Alexander J., Eisner, Flurin, Ghosh, Pratyush, Congrave, Daniel G., Azzouzi, Mohammed, Andaji-Garmaroudi, Zahra, Leventis, Anastasia, Rao, Akshay, Frost, Jarvist Moore, Nelson, Jenny, Bronstein, Hugo
Issue&Volume: 2024-08-20
Abstract: Control of the molecular configuration at the interface of an organic heterojunction is key to the development of efficient optoelectronic devices. Due to the difficulty in characterizing these buried and (probably) disordered heterointerfaces, the interfacial structure in most systems remains a mystery. Here we demonstrate a synthetic strategy to design and control model interfaces, enabling their detailed study in isolation from the bulk material. This is achieved by the synthesis of a polymer in which a non-fullerene acceptor moiety is covalently bonded to a donor polymer backbone using dual alkyl chain links, constraining the acceptor and donor units in a through space co-facial arrangement. The constrained geometry of the acceptor relative to the electron-rich and -poor moieties in the polymer backbone can be tuned to control the kinetics of charge separation and the energy of the resultant charge-transfer state giving insight into factors that govern charge generation at organic heterojunctions.
DOI: 10.1038/s41557-024-01578-x
Source: https://www.nature.com/articles/s41557-024-01578-x
期刊信息
Nature Chemistry：《自然—化學》，創刊于2009年。隸屬于施普林格·自然出版集團，最新IF：24.274
**官方網址：**https://www.nature.com/nchem/
**投稿鏈接：**https://mts-nchem.nature.com/cgi-bin/main.plex
