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用于单组分白色有机余辉的调制三模发射
作者:小柯机器人 发布时间:2021/9/16 15:43:48

南京邮电大学陈润锋团队报道了用于单组分白色有机余辉的调制三模发射。相关研究成果于2021年9月15日发表在《德国应用化学》。

实现单组分白色有机余辉仍然是一个巨大的挑战,因为难以同时支持从分子的不同激发态发出的长寿命余辉。

该文中,研究人员提出了一种由单重态(S1)、三重态(T1)和稳定三重态(T1*)激发态的辐射衰变产生的特殊三模发射,通过调节单重态-三重态分裂能量(ΔE ST)和激子俘获深度(E TD)来提供白色余辉。黄色余辉的低位T1*由具有大E TD和微量异构体掺杂的H-聚集工程构建,而具有热激活发射特征的蓝色余辉的高位T1和S1通过施主-受主分子设计降低ΔE ST实现。

因此,通过合理调节S1、T1和T1*互补发射的余辉强度比,获得了效率高达14.1%、寿命为0.61s的单组分白色余辉。

附:英文原文

Title: Modulating Tri-mode Emission for Single-component White Organic Afterglow

Author: Jibiao Jin, Peiran Xue, Longyan Zhang, He Jiang, Wuji Wang, Qingqing Yang, Ye Tao, Chao Zheng, Runfeng Chen, Wei Huang

Issue&Volume: 2021-09-15

Abstract: Achieving single-component white organic afterglow remains a great challenge owing to the difficulties in simultaneously supporting long-lived emissions from varied excited states of a molecule for complementary afterglow. Here, an extraordinary tri-mode emission from the radiative decays of singlet (S  1  ), triplet (T  1  ) and stabilized triplet (T  1  *  ) excited states was proposed to afford white afterglow through modulating the singlet-triplet splitting energy (Δ  E  ST  ) and exciton trapping depth (  E  TD  ). Low-lying T  1  *  for yellow afterglow was constructed by H-aggregation engineering with large  E  TD  and trace isomer doping, while high-lying T  1  and S  1  for blue afterglow with thermally activated emission feature was realized by reducing Δ  E  ST  through donor-acceptor molecular design. Therefore, the single-component white afterglow with high efficiency of 14.1% and lifetime of 0.61 s was achieved by rationally regulating the afterglow intensity ratios of complementary emissions from S  1  , T  1  and T  1  *  .

DOI: 10.1002/anie.202109229

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202109229

 

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx