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Issue 32, 2017
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Synthesis of highly fluorescent InP/ZnS small-core/thick-shell tetrahedral-shaped quantum dots for blue light-emitting diodes

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Abstract

Blue light-emitting diodes (LEDs) offer new opportunities in practical solid-state lighting and could play a significant role in reducing global energy consumption. Here, for the first time, we report the synthesis of highly fluorescent InP/ZnS small-core/thick-shell tetrahedral shaped QDs for blue LED applications. These QDs have absolute fluorescence quantum yield (QY) up to 76%, along with a full width at half-maximum as narrow as 44 nm and a prolonged photoluminescence lifetime of above 60 ns, which are records for blue InP QDs. In addition, these small-core/thick-shell QDs show improved stability for over 1000 hours of storage under ambient conditions. Correspondingly, blue LED devices with a maximum luminance of 90 cd m−2 were successfully demonstrated using InP/ZnS QDs as the active layer. This work may pave the way for the development of next generation environmentally friendly blue light sources using heavy-metal-free QDs with high efficiency, high color purity and high stability.

Graphical abstract: Synthesis of highly fluorescent InP/ZnS small-core/thick-shell tetrahedral-shaped quantum dots for blue light-emitting diodes

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Publication details

The article was received on 29 Jun 2017, accepted on 18 Jul 2017 and first published on 18 Jul 2017


Article type: Paper
DOI: 10.1039/C7TC02927F
Citation: J. Mater. Chem. C, 2017,5, 8243-8249
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    Synthesis of highly fluorescent InP/ZnS small-core/thick-shell tetrahedral-shaped quantum dots for blue light-emitting diodes

    W. Shen, H. Tang, X. Yang, Z. Cao, T. Cheng, X. Wang, Z. Tan, J. You and Z. Deng, J. Mater. Chem. C, 2017, 5, 8243
    DOI: 10.1039/C7TC02927F

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