磷化铟量子点的合成及其显示器件应用研究进展

doi:10.11896/cldb.19100123

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Abstract Quantum dots (QDs) have attracted tremendous interest due to their excellent optical properties such as broad tunable emission, high color purity and quantum yield, and are employed in display application as emission layer. Cd-based QDs are generally usedin the commercial application for their narrow full width at half maximum (FWHM) of photo luminescent (PL) spectrum could be lower than 20 nm, high quantum yield (QY) up to about 100%. But the toxic heavy metal Cd is restricted in the actual application. Therefore, heavy metal free indium phosphine (InP) QDs is an attractive alternative for their relatively high color purity and high fluorescence.
However, the optical properties of InP QDs and InP QDs based LED are worse than those of Cd-based QDs and Cd-based QLED, respectively. In the past few years, great improvement has been made through the control of precursors reactivity and the surface oxidation, effective growth of shell, and its FWHM could be as narrow as 35 nm, QY could be raised to ~93%. Moreover, external quantum yield (EQE) of InP QDs based LED have been greatly improved form the promoting of QLED structure from 0.008% to 12%.
To obtain InP QDs with high color purity, the precursors reactivity has been effective control through employing different kinds of phosphine precursor and different P∶In ratio, and the surface oxidation have been greatly inhibited through long time vacuum. To obtain InP QDs with high quantum yield, indium incorporation has been avoided during epitaxial growth of shell, and entropic ligands were introduced. After using InP QDs with excellent optical properties as emission layer, the electron and hole transporting layers with optimized structure, InP QDs based QLED have been obtained with both high EQE and luminescence.
This review summarizes recent research development on how to obtain InP QDs with concurrent high color purity and PL QY. And the improvement of display application of InP QDs are also introduced. Finally, the challenges as well as the future directions of synthetic method and application in display are discussed.

Key words： quantum dots indium phosphide color purity quantum yield electroluminescent display device

Published: 24 December 2020

CLC number:	TB34
	TN312+.8

Fund:This work was financially supported by the Science and Technology Committee of Shanghai (16JC1400604) and the National Natural Science Foundation of China (81671782).

About author:: Gongli Lin is currently pursuing his master degree at the School of Materials Science and Engineering & State Key Laboratory of Metal Matrix Composites of Shanghai Jiao Tong University under the supervision of Prof. Wanwan Li. He is focused on the design and synthesis of indium phosphide colloidal quantum dots, and their applications on light-emitting devices.
Zhiwen Yang obtained his M. S. degree in School of Materials Science and Engineering from Dalian University of Technology in 2011. He is currently a Ph.D. candidate at the School of Materials Science and Enginee-ring & State Key Laboratory of Metal Matrix Composites of Shanghai Jiao Tong University under the supervision of Prof. Wanwan Li. He is focused on the design and synthesis of colloidal quantum dots, and their applications on light-emitting devices.
Wanwan Li obtained his Ph. D. in materials science from Shanghai University in 2004, then he joined the School of Materials Science and Engineering & State Key Laboratory of Metal Matrix Composites of Shanghai Jiao Tong University (SJTU) in 2005, where he was promoted to a professor in 2013. He is currently a professor and doctoral supervisor of the SJTU. His research interests include synthesis of quantum dots, and their applications on light-emitting devices, fabrication of inorganic nanocrystals, organicinorganic hierarchical assemblies, and their applications on biomedical diagnosis & therapy. He has published more than 70 articles in scientific peer-reviewed international journals, including Chemical Society Reviews, Materials Today, Advanced Materials, Angewandte Chemie International Edition, ACS Nano, Advanced Functional Materials and Materials Horizons, etc.

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Cite this article:

LIN Gongli,YANG Zhiwen,LI Wanwan. Progress on Synthesis and Display Application of Indium Phosphide Quantum Dots[J]. Materials Reports, 2020, 34(23): 23057-23063.

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http://www.mater-rep.com/EN/10.11896/cldb.19100123 OR http://www.mater-rep.com/EN/Y2020/V34/I23/23057

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