期刊
INORGANIC CHEMISTRY
卷 55, 期 17, 页码 8381-8386出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.inorgchem.6b00747
关键词
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资金
- NWs4LIGHT project
- Basic Science Research Program through the National Research Foundation of Korea - Ministry of Science, ICT & Future Planning [2015R1C1A1A02037514]
- National Research Foundation of Korea [2015R1C1A1A02037514] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
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