Bo Zhang, Chang-Tai Li, Han-Yu Wang, Han Fang, Dr. Rui Feng, Dr. Mei-Hui Yu, Prof. Wei Li, Prof. Ze Chang, Prof. Xian-He Bu
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引用次数: 0
摘要
温度补偿光子器件在光子集成电路(PICs)领域的应用受到精度差和传播功能过于简单的限制。在此,我们报道了一个新的具有热激活延迟荧光(TADF)的供体-受体金属-有机骨架(D - a MOF)库,并利用TADF发射器独特的温度响应特性制作了温度补偿光子器件。通过一种新颖的策略,在D - A mof中实现了TADF的高度可调谐的通过空间电荷转移(TSCT),该策略将内部重原子效应(HAE)与外部重原子效应(HAE)协同结合,由重原子合并到不同的组分中,实现了可调节的光物理指标,包括可调节的PL波长(534至592 nm)和急剧上升的量子产率(5.02%至47.39%)。通过四种具有取代基连接剂的D - A体系的晶体结构和Hirshfeld表面图,进一步研究了外部HAE对TADF的影响。值得注意的是,通过集成温度响应相反的D - A mof,制备了基于异质晶体的温度补偿光子器件。在215k ~ 295k范围内,异质结的发射信号输出基本保持稳定,突出了具有敏感温度响应的TADF D‐A MOF在PICs领域的潜在应用前景。
Regulation of TADF by Internal and External Heavy Atom Effect in D-A MOF for Heterocrystal based Temperature-Compensated Photonic Device
The application of temperature-compensated photonic device is hampered by poor accuracy and overly simplistic functions of propagation in photonic integrated circuits (PICs) field. Herein, we report a new library of donor-acceptor metal–organic framework (D−A MOF) with thermally activated delayed fluorescence (TADF) and the fabricating of temperature-compensated photonic device by virtue of the unique temperature response character of TADF emitters. Highly tunable through-space charge transfer (TSCT) of TADF was realized within the D−A MOFs through a novel strategy that synergistically combines the internal heavy atom effect (HAE) with an external HAE, induced by the incorporation of heavy atoms into different components, achieving the regulable photophysical indicators including adjustable PL wavelength (534 to 592 nm) and surging quantum yield (5.02 %–47.39 %). Further investigation of the impact of external HAE on TADF was conducted through crystal structures and Hirshfeld surface plots of four D−A regimes featuring substituent-based linkers. Notably, temperature-compensated photonic device based on heterocrystal was fabricated through integrating D−A MOFs with contrary temperature response. The emission signal output of the heterojunction remained nearly stable in 215 K to 295 K range, highlighting the promising potential application of TADF D−A MOF featuring sensitive temperature response in PICs field.
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.