Triphenylamine-Derived Solid-State Emissive Carbon Dots for Multicolor High-Efficiency Electroluminescent Light-Emitting Diodes

Biao Zhao; Huanyu Ma; Haoran Jia; Mengyun Zheng; Kunxiang Xu; Runnan Yu; Songnan Qu; Zhan'ao Tan

doi:10.1002/anie.202301651

Triphenylamine-Derived Solid-State Emissive Carbon Dots for Multicolor High-Efficiency Electroluminescent Light-Emitting Diodes

Angew Chem Int Ed Engl. 2023 May 22;62(22):e202301651. doi: 10.1002/anie.202301651. Epub 2023 Apr 21.

Authors

Biao Zhao¹, Huanyu Ma¹, Haoran Jia², Mengyun Zheng¹, Kunxiang Xu¹, Runnan Yu¹, Songnan Qu³, Zhan'ao Tan¹

Affiliations

¹ Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
² Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing JiaoTong University, Beijing, 100044, China.
³ Joint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Avenida da Universidade, Taipa, 999078, Macau, China.

PMID: 36997339
DOI: 10.1002/anie.202301651

Abstract

Two kinds of triphenylamine-derived solid-state emissive carbon dots (CDs) with orange and yellow color are facilely synthesized through solvothermal treatment, taking advantage of the nonplanar structure and good carrier mobility of triphenylamine unit. Theoretical calculations show that the triphenylamine structure could greatly inhibit the direct π-π stacking of aromatic skeletons and enhance the fluorescence properties of CDs in aggregation state. By adopting the CDs as single emissive layer, high-performance orange-color and green-color electroluminescent light-emitting diodes (LEDs) are successfully fabricated, with maximum brightness of 9450/4236 cd m^-2 , high current efficiency of 1.57/2.34 cd A^-1 and low turn-on voltage of 3.1/3.6 eV are respectively achieved. Significantly, white-color LED device is further prepared. This work provides a universal platform for the construction of novel solid-state emissive CDs with significant applications in photoelectric device.

Keywords: Carbon Dots; Electroluminescence; Light-Emitting Diodes; Solid-State Fluorescence; Triphenylamine.

Abstract

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