Passivation and Interlayer Effect of Zr(i-PrO)4 on Green CuGaS2/ZnS/Zr(i-PrO)4@Al2O3 and Red CuInS2/ZnS/Zr(i-PrO)4@Al2O3 QD Hybrid Powders

IF 4.703 3区材料科学

Nanoscale Research Letters Pub Date : 2022-11-07 DOI:10.1186/s11671-022-03741-0

Minji Ko, Soyeon Yoon, Yun Jae Eo, Keyong Nam Lee, Young Rag Do

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Abstract

Broadband emissive I–III–VI quantum dots (QDs) are synthesized as efficient and stable I–III–VI QDs to be used as eco-friendly luminescent materials in various applications. Here, we introduce the additional passivation of zirconium isopropoxide (Zr(i-PrO)₄) to improve the optical properties and environmental stability of green-emitting CuGaS₂/ZnS (G-CGS/ZnS) and red-emitting CuInS₂/ZnS (R-CIS/ZnS) QDs. The photoluminescence quantum yield (PLQY) of both resultant Zr(i-PrO)₄-coated G-CGS/ZnS and R-CIS/ZnS QDs reaches similar values of ~ 95%. In addition, the photostability and thermal-stability of G-CGS/ZnS/Zr(i-PrO)₄ and R-CIS/ZnS/Zr(i-PrO)₄ QDs are improved by reducing the ligand loss via encapsulation of the ligand-coated QD surface with Zr(i-PrO)₄. It is also proved that the Zr(i-PrO)₄-passivated interlayer mitigates the further degradation of I-III-V QDs from ligand loss even under harsh conditions during additional hydrolysis reaction of aluminum tri-sec-butoxide (Al(sec-BuO)₃), forming easy-to-handle G-CGS/ZnS and R-CIS/ZnS QD-embedded Al₂O₃ powders. Therefore, the introduction of a Zr(i-PrO)₄ complex layer potentially provides a strong interlayer to mitigate degradation of I–III–VI QD-embedded Al₂O₃ hybrid powders as well as passivation layer for protecting I–III–VI QD.

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Zr(i-PrO)4 对绿色 CuGaS2/ZnS/Zr(i-PrO)4@Al2O3 和红色 CuInS2/ZnS/Zr(i-PrO)4@Al2O3 QD 混合粉末的钝化和层间效应

宽带发射I-III-VI量子点（QDs）被合成为高效稳定的I-III-VI量子点，可作为环保型发光材料应用于各种领域。在这里，我们引入了异丙氧化锆（Zr(i-PrO)4）的附加钝化，以改善绿色发光 CuGaS2/ZnS (G-CGS/ZnS) 和红色发光 CuInS2/ZnS (R-CIS/ZnS) QDs 的光学特性和环境稳定性。镀有 Zr(i-PrO)4 的 G-CGS/ZnS 和 R-CIS/ZnS QD 的光致发光量子产率（PLQY）达到了类似的 95% 左右。此外，G-CGS/ZnS/Zr(i-PrO)4 和 R-CIS/ZnS/Zr(i-PrO)4 QDs 的光稳定性和热稳定性也通过配体包覆的 QD 表面与 Zr(i-PrO)4 的封装而得到改善。研究还证明，即使在三仲丁氧基铝（Al(sec-BuO)3）发生额外水解反应的苛刻条件下，钝化的 Zr(i-PrO)4 中间层也能减轻配体流失对 I-III-V QD 的进一步降解，形成易于处理的 G-CGS/ZnS 和 R-CIS/ZnS QD 嵌入 Al2O3 粉末。因此，Zr(i-PrO)4 复合物层的引入有可能提供一个强大的中间层，以减轻嵌入式 I-III-VI QD 的 Al2O3 混合粉末的降解，并提供保护 I-III-VI QD 的钝化层。

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来源期刊

Nanoscale Research Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

15.00

自引率

0.00%

发文量

110

审稿时长

2.5 months

期刊介绍： Nanoscale Research Letters (NRL) provides an interdisciplinary forum for communication of scientific and technological advances in the creation and use of objects at the nanometer scale. NRL is the first nanotechnology journal from a major publisher to be published with Open Access.