Abstract
The design of materials for devices that integrate organic light-emitting diode and ultraviolet organic photodetectors (OLED-UVOPDs) faces a grand challenge. In this study, we synthesized two blue fluorescent emitters utilizing triphenylamine (TPA) and 4-methyl-N-phenyl-N-(p-tolyl)-aniline (MeTPA) units as donors, benzonitrile as an acceptor, and anthracene (AN) as a bridge, namely TPA-AN and 2mTPA-AN. Notably, both emitters demonstrated high absolute fluorescence quantum yields of 51.1% for TPA-AN and 46.6% for 2mTPA-AN with emission peaks at 474 and 488 nm, respectively. Single-carrier devices indicated favorable electron mobilities of 3.96 × 10−5 cm2 V−1 s−1 for TPA-AN and 6.63 × 10−7 cm2 V−1 s−1 for 2mTPA-AN. Furthermore, the OLED based on TPA-AN exhibited a pure blue emission with a brightness of 43,110 cd m−2 and a maximum external quantum efficiency (EQE) of 8.1%. The integrated OLED-UVOPD devices based on TPA-AN and 2mTPA-AN, achieved detectivities of 7.18 × 1011 and 2.85 × 1012 Jones, along with EQEs of 8.7% and 5.9%, respectively.
摘要
有机集成化光电子器件兼具了小型化和多功能性的优势, 如集 成了有机发光和紫外探测的有机发光紫外探测器件(OLED-UVOPDs). 这种器件中的有机光电材料的设计仍然面临重大的挑战. 在本文中, 以 蒽为π桥, 腈基苯为受体, 三苯胺(TPA)和二甲基三苯胺(2mTPA)分别为 给体, 设计并合成了两种可用于OLED-UVOPD器件的蓝色发光分子, TPA-AN和2mTPA-AN. 它们的发光峰分别位于474和488 nm处, 荧光 量子产率为51.1%和46.6%. 通过单载流子器件计算得到其电子迁移率 分别为3.96 × 10−5 和6.63 × 10−7 cm2 V−1 s−1. 基于TPA-AN的OLED器 件表现出强的蓝光发射, 最大亮度为43,110 cd m −2, 最大外量子效率 (EQE)为8.1%. 它们在OLED-UVOPD集成器件中表现出优异的性能, 紫外探测率分别为7.18 × 1011 和2.85 × 1012 Jones, 最大EQE分别为8.7% 和5.9%.
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Acknowledgements
This work was financially supported by the Joint Funds of the National Natural Science Foundation of China (NSFC, U21A20492), NSFC (61705156, 60976018, and 61605138), the Key R&D program of Shanxi Province (International Cooperation, 201903D421087, 201903D121100), Shanxi Scholarship Council of China (2020-049), and Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering (2021SX-FR007).
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Author contributions Xu H designed the molecular structures. Miao Y, Wang H and Yu J designed the devices’ structures and revised the manuscript. Wang Y, Zhao S and Luo Q synthesized the organic molecules (TPA-AN and 2mTPA-AN). Dong W and Bai Y fabricated all the devices and wrote the manuscript under the guidance of Xu H. All authors contributed to the general discussion.
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Wenjian Dong is a graduate student at the Key Laboratory of Interface Science and Engineering in Advanced Materials Ministry of Education, Taiyuan University of Technology. His main research is organic optoelectronic materials and organic integrated devices.
Huixia Xu is an associate professor at the Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology. She received her PhD degree from Taiyuan University of Technology in 2010. Her research focuses on the design of optoelectronic materials for organic light-emitting devices, organic photodetectors, and organic integrated devices.
Junsheng Yu obtained his PhD degree from Tokyo University of Agriculture and Technology in 2001. He is a professor at the State Key Laboratory of Electronic Thin Film & Integrated Devices, University of Electronic Science and Technology of China. Furthermore, he is the director of Sichuan Province Key Laboratory of Display Science and Technology. His research focuses on developing organic photoelectric devices such as organic/perovskite light-emitting diodes, organic/perovskite solar cells, organic/perovskite photodetectors and organic sensors based on thin film transistors.
Supplementary information Experimental details and supporting data are available in the online version of the paper.
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Utilizing anthracene- and triphenylamine-based blue fluorescent emitters with D–π–A structures in integrated organic light-emitting and ultraviolet photodetector devices
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Dong, W., Bai, Y., Wang, Y. et al. Utilizing anthracene- and triphenylamine-based blue fluorescent emitters with D–π–A structures in integrated organic light-emitting and ultraviolet photodetector devices. Sci. China Mater. 67, 197–204 (2024). https://doi.org/10.1007/s40843-023-2689-9
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DOI: https://doi.org/10.1007/s40843-023-2689-9