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通过共沉淀法合成的氧化锌纳米颗粒的可见发射增强

Improved Visible Emission from ZnO Nanoparticles Synthesized via the Co-Precipitation Method.

作者信息

Apostoluk Alexandra, Zhu Yao, Gautier Pierrick, Valette Audrey, Bluet Jean-Marie, Cornier Thibaut, Masenelli Bruno, Daniele Stephane

机构信息

Université de Lyon, INL-INSA Lyon, CNRS, UMR 5270, 69621 Villeurbanne, France.

Université de Lyon, IRCE Lyon, CNRS, UMR 5256, 69626 Villeurbanne, France.

出版信息

Materials (Basel). 2023 Aug 1;16(15):5400. doi: 10.3390/ma16155400.

DOI:10.3390/ma16155400
PMID:37570103
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10420257/
Abstract

Since ZnO nanoparticles (NPs) possess a variety of intrinsic defects, they can provide a wide spectrum of visible emission, without adding any impurity or any doping atoms. They are attracting more and more interest as a material for light sources and energy downshifting systems. However, defect emission with a high luminescence quantum efficiency (PL QY) is difficult to obtain. Here, we present the co-precipitation synthesis parameters permitting to attain ZnO NPs with highly visible PL QYs. We found that the nature of zinc precursors and alkaline hydroxide (KOH or LiOH) used in this method affects the emission spectra and the PL QY of the as-grown ZnO NPs. LiOH is found to have an advantageous effect on the visible emission efficiency when added during the synthesis of the ZnO NPs. More precisely, LiOH permits to increase the emission efficiency in the visible up to 13%. We discuss the effects of the nanoparticle size, the morphology and the surface stabilization on the enhancement of the luminescent emission efficiency. Various spectral contributions to the luminescent emission were also examined, in order to achieve a control of the defect emission to increase its efficiency.

摘要

由于氧化锌纳米颗粒（NPs）具有多种固有缺陷，它们无需添加任何杂质或掺杂原子就能产生广泛的可见发射。作为光源和能量下移系统的材料，它们正吸引着越来越多的关注。然而，很难获得具有高发光量子效率（PL QY）的缺陷发射。在此，我们展示了通过共沉淀合成参数可获得具有高可见PL QY的氧化锌纳米颗粒。我们发现该方法中使用的锌前驱体和碱金属氢氧化物（KOH或LiOH）的性质会影响生长的氧化锌纳米颗粒的发射光谱和PL QY。发现在氧化锌纳米颗粒合成过程中添加LiOH对可见发射效率具有有利影响。更确切地说，LiOH可使可见光发射效率提高至13%。我们讨论了纳米颗粒尺寸、形态和表面稳定性对发光发射效率增强的影响。还研究了对发光发射的各种光谱贡献，以实现对缺陷发射的控制从而提高其效率。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/e8520373c512/materials-16-05400-g012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/e8520373c512/materials-16-05400-g012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/11b2f3d14b81/materials-16-05400-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/a1fa0b461566/materials-16-05400-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/2f1421dd47a8/materials-16-05400-g007a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/fb9edd01f93c/materials-16-05400-g008a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/1f3da107ede3/materials-16-05400-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/c2166e845497/materials-16-05400-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/33e2cb3d3917/materials-16-05400-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/146c/10420257/e8520373c512/materials-16-05400-g012.jpg

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