Near-Infrared-Emitting CdxHg1–xSe-Based Core/Shell Nanoplatelets,Chemistry of Materials

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Near-Infrared-Emitting CdxHg1–xSe-Based Core/Shell Nanoplatelets
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-09-21 , DOI: 10.1021/acs.chemmater.1c01682
Andrei Mitrofanov _{1,

2,

3} , Anatol Prudnikau ₁ , Francesco Di Stasio ₄ , Nelli Weiß ₁ , René Hübner ₅ , Anna Maria Dominic ₆ , Konstantin B. L. Borchert ₂ , Vladimir Lesnyak ₁ , Alexander Eychmüller ₁

Affiliation

The anisotropy in semiconductor nanoplatelets (NPLs) is reflected in the anisotropy of their crystal structure and organic ligand shell, which can be used for creating new semiconductor heterostructures. This work demonstrates the synthesis of core/shell NPLs containing zero-dimensional (0D) Cd_xHg_1–xSe domains embedded in CdSe NPLs via cation exchange. The strategy is based on the different accessibility of definite regions of the NPLs for incoming cations upon time-limited reaction conditions. The obtained heterostructures were successfully overcoated with a Cd_yZn_1–yS shell preserving their two-dimensional (2D) morphology. The NPLs exhibit bright photoluminescence in the range of 700–1100 nm with quantum yields up to 55%, thus making them a prospective material for light-emitting applications in the near-infrared spectral range.

中文翻译：

近红外发射 CdxHg1–xSe 的核/壳纳米血小板

半导体纳米片（NPL）的各向异性反映在其晶体结构和有机配体壳的各向异性上，可用于创建新的半导体异质结构。这项工作展示了通过阳离子交换合成包含嵌入 CdSe NPL中的零维 (0D) Cd _x Hg _{1– x} Se 域的核/壳 NPL 。该策略基于在限时反应条件下进入阳离子的 NPL 特定区域的不同可及性。获得的异质结构成功地覆盖了 Cd _y Zn _{1- y}S 壳保留其二维 (2D) 形态。NPLs 在 700-1100 nm 范围内表现出明亮的光致发光，量子产率高达 55%，从而使其成为近红外光谱范围内发光应用的潜在材料。

更新日期：2021-10-12

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