Effect of Zinc Incorporation on the Performance of Red Light Emitting InP Core Nanocrystals

Effect of Zinc Incorporation on the Performance of Red Light Emitting InP Core Nanocrystals

This report presents a systematic study on the effect of zinc (Zn) carboxylate precursor on the structural and optical properties of red light emitting InP nanocrystals (NCs). NC cores were assessed using X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), energy-dispersive...

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Veröffentlicht in:Inorganic chemistry 2016-09, Vol.55 (17), p.8381-8386
Hauptverfasser: Xi, Lifei, Cho, Deok-Yong, Besmehn, Astrid, Duchamp, Martial, Grützmacher, Detlev, Lam, Yeng Ming, Kardynał, Beata E
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container_end_page 8386
container_issue 17
container_start_page 8381
container_title Inorganic chemistry
container_volume 55
creator Xi, Lifei
Cho, Deok-Yong
Besmehn, Astrid
Duchamp, Martial
Grützmacher, Detlev
Lam, Yeng Ming
Kardynał, Beata E
description This report presents a systematic study on the effect of zinc (Zn) carboxylate precursor on the structural and optical properties of red light emitting InP nanocrystals (NCs). NC cores were assessed using X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XAS), energy-dispersive X-ray spectroscopy (EDX), and high-resolution transmission electron microscopy (HRTEM). When moderate Zn:In ratios in the reaction pot were used, the incorporation of Zn in InP was insufficient to change the crystal structure or band gap of the NCs, but photoluminescence quantum yield (PLQY) increased dramatically compared with pure InP NCs. Zn was found to incorporate mostly in the phosphate layer on the NCs. PL, PLQY, and time-resolved PL (TRPL) show that Zn carboxylates added to the precursors during NC cores facilitate the synthesis of high-quality InP NCs by suppressing nonradiative and sub-band-gap recombination, and the effect is visible also after a ZnS shell is grown on the cores.
doi_str_mv 10.1021/acs.inorgchem.6b00747
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title Effect of Zinc Incorporation on the Performance of Red Light Emitting InP Core Nanocrystals
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