Development and challenges of indium phosphide-based quantum-dot light-emitting diodes

Quantum dot light-emitting diodes (QLEDs) have developed rapidly in the last several decades, in which the maximum external quantum efficiency of the three primary color cadmium (Cd)-based QLEDs have exceeded the theoretical maximum value. However, the presence of Cd element has severely hampered th...

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Published in:Journal of photochemistry and photobiology. C, Photochemistry reviews Photochemistry reviews, 2023-06, Vol.55, p.100588, Article 100588
Main Authors: Wang, Shuaibing, Li, Yu, Chen, Jie, Lin, Ouyang, Niu, Wentao, Yang, Chunhe, Tang, Aiwei
Format: Article
Language:English
Subjects:
Display
Electroluminescence
InP
Nanocrystals
Photoluminescence
Quantum-dot light-emitting diodes
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Summary:Quantum dot light-emitting diodes (QLEDs) have developed rapidly in the last several decades, in which the maximum external quantum efficiency of the three primary color cadmium (Cd)-based QLEDs have exceeded the theoretical maximum value. However, the presence of Cd element has severely hampered their commercialization. Indium phosphide (InP)-based quantum dots (QDs) without heavy metals have continuously adjustable luminescence range from blue to near infrared, which is a competitive alternative for Cd-based QDs. Especially in the last few years, the synthesis techniques and the device structures of InP-based QLEDs have been greatly improved. In this review, we first introduce the properties of InP-based QDs, carrier dynamics and the early development history. Then, we focus on the development of InP-based red, green and blue primary color QLEDs from their first report in 2011 to the current state of the art. The effects of QDs structure (core/shell or gradient-alloyed QDs and organic ligand modified QDs) and device structure (charge transport layer and interfacial engineering) on the performance of InP-based QLEDs are also summarized. •Heavy-metal-free indium phosphide (InP)-based quantum dot light-emitting diodes (QLEDs) were summarized.•Properties, synthesis methods, and development of InP-based quantum dot (QDs) were highlighted.•The evolution of QLED devices and the research progress of red, green and blue InP-based QLEDs were reviewed.•Structural and interfacial engineering of the InP-based QLED devices ere clarified.
ISSN:1389-5567
1873-2739
DOI:10.1016/j.jphotochemrev.2023.100588