Narrow Blue Emission from Cadmium Phosphide Clusters Enhanced through Phosphinate Ligation

IF 9.6 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2025-05-30 DOI:10.1021/acs.nanolett.5c01891

Soren F. Sandeno, Samantha M. Harvey, Vijay N. Lin, Brandi M. Cossairt

引用次数: 0

Abstract

The atomic precision of magic-sized clusters offers a route toward narrow emission by eliminating heterogeneous broadening. Herein, we report ultranarrow 467 nm blue emission from cadmium phosphide clusters with a 96 meV line width and as high as 26% photoluminescence quantum yield (PLQY) enabled by tightly bound, bidentate phosphinate ligands. They are obtained through postsynthetic ligand exchange from oleate-capped clusters. The phosphinate maintains the bidentate coordination motif, which does not disturb the metastability of the material but does induce a change in the surface dipole, causing a bathochromic shift in the emission from 457 to 467 nm, which is an optimal wavelength for blue emission. We find that the structure of the ligand tail can heavily influence PLQY and other aspects of the charge carrier dynamics. The ligand exchange protocol can be applied to the related cadmium arsenide clusters, resulting in a narrow 550 nm green emission with a 9% PLQY.

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膦酸盐结扎增强磷化镉团簇窄蓝光发射

魔术大小的星团的原子精度通过消除异质展宽为窄发射提供了一条途径。本文中，我们报道了由紧密结合的双齿膦酸配体实现的磷化镉团簇的超467 nm蓝光发射，其线宽为96 meV，光致发光量子产率高达26%。它们是通过合成后的配体交换从油酸盖簇中获得的。磷酸盐保持双齿配位基序，这不会干扰材料的亚稳性，但会引起表面偶极子的变化，导致发射从457 nm到467 nm的色移，这是蓝色发射的最佳波长。我们发现配体尾部的结构会严重影响PLQY和载流子动力学的其他方面。配体交换协议可以应用于相关的砷化镉簇，产生窄的550 nm绿色发射，PLQY为9%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

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