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Nano Research 2022, 15(10): 9573-9577 https://doi.org/10.1007/s12274-022-4536-7
Research Article | Issue | Published: 16 July 2022

Chiral CdSe/CdS quantum dot (in rod)-light-emitting diodes with circularly polarized electroluminescence

Show Author's Information Tianwei Duan1,  Jing Ai2,  Sujie Chen3,  Gufeng He3,  Xiaojun Guo3( ),  Lu Han2( ),  Shunai Che1,2,  Yingying Duan2( )
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China
Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
Keywords:
electroluminescence, circularly polarized light emission, helical assembly, chiral nanoparticle, CdSe/CdS nanorods
Topics:
Semiconductor quantum dots
Cite this article:
Duan T, Ai J, Chen S, et al. Chiral CdSe/CdS quantum dot (in rod)-light-emitting diodes with circularly polarized electroluminescence. Nano Research, 2022, 15(10): 9573-9577. https://doi.org/10.1007/s12274-022-4536-7
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Abstract Full text Electronic supplementary material About this article

Chiral quantum dot (in rod)-light-emitting diodes (CQLEDs) with circularly polarized electroluminescence (CPEL) have driven interest in the future display, communication, and storage industries. However, the preparation of CQLEDs is still a challenging unresolved. Herein, we fabricated CQLEDs through spin-coating evaporation of chiral CdSe/CdS quantum rods (CCCQs) colloidal solution on indium tin oxide substrate. The CCCQs were synthesized via an isotropically epitaxial growth with cholic acid as the symmetry breaking agent, which induced one-direction chiral dislocation around the c axis of their hexagonal crystal structure. The CCCQs were ranked side-by-side in right-handed chiral arrangement with helical axis perpendicular to substrate due to chiral driving force of the cholic acid arrangement. The CQLEDs exhibited a negative CPEL signal at 600 nm with a |gEL| of 2 × 10−4, which is ascribable to the selective filtration on emission arising from the circular Bragg resonance by quasi-photonic crystal structures.


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About this article

Chiral CdSe/CdS quantum dot (in rod)-light-emitting diodes with circularly polarized electroluminescence

Show Author's information Tianwei Duan1, Jing Ai2, Sujie Chen3, Gufeng He3, Xiaojun Guo3( ), Lu Han2( ), Shunai Che1,2, Yingying Duan2( )
School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules, State Key Laboratory of Metal Matrix Composites, Shanghai Key Laboratory for Molecular Engineering of Chiral Drugs, Shanghai Jiao Tong University, Shanghai 200240, China
School of Chemical Science and Engineering, Tongji University, Shanghai 200092, China
Department of Electronic Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Abstract

Chiral quantum dot (in rod)-light-emitting diodes (CQLEDs) with circularly polarized electroluminescence (CPEL) have driven interest in the future display, communication, and storage industries. However, the preparation of CQLEDs is still a challenging unresolved. Herein, we fabricated CQLEDs through spin-coating evaporation of chiral CdSe/CdS quantum rods (CCCQs) colloidal solution on indium tin oxide substrate. The CCCQs were synthesized via an isotropically epitaxial growth with cholic acid as the symmetry breaking agent, which induced one-direction chiral dislocation around the c axis of their hexagonal crystal structure. The CCCQs were ranked side-by-side in right-handed chiral arrangement with helical axis perpendicular to substrate due to chiral driving force of the cholic acid arrangement. The CQLEDs exhibited a negative CPEL signal at 600 nm with a |gEL| of 2 × 10−4, which is ascribable to the selective filtration on emission arising from the circular Bragg resonance by quasi-photonic crystal structures.

Keywords: electroluminescence, circularly polarized light emission, helical assembly, chiral nanoparticle, CdSe/CdS nanorods

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Publication history
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Acknowledgements

Publication history

Received: 16 February 2022
Revised: 12 May 2022
Accepted: 13 May 2022
Published: 16 July 2022
Issue date: October 2022

Copyright

© Tsinghua University Press 2022

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 21931008, S. C.; 21922304, 21873072, L. H., and 21975184, Y. D.), the National Key R&D Program of China (No. 2021YFA1200300, S. C.), and the Science Foundation of the Shanghai Municipal Science and Technology Commission (No. 19JC1410300, S. C.).

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