Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education, College of Chemistry & Environmental Science, Hebei University, Baoding, 071002, China.
Chemistry. 2022 Nov 2;28(61):e202201990. doi: 10.1002/chem.202201990. Epub 2022 Sep 1.
Producing high performance phosphors using abundant and non-toxic precursors yet straightforward methods are promising but still a challenging task. Herein, highly luminescent and thermally stable phosphors were fabricated through an in situ precipitation synthesis strategy. Sulfur nanodots (S-dots) act as the precursors for precipitation reactions and also provide the luminescent centers. Structural and optical characterization investigations suggest that S-dots are incorporated in the matrix of BaSO , and BaSO provides passivation effect for the surface ligands or traps of S-dots. This results in the promotion of photoluminescence quantum yield from 23 % to 58 %, and the BaSO matrix also leads to the obvious promotion of thermal stability. These merits endow the construction of phosphor-based light-emitting diodes by utilizing the S-dots@BaSO hybrid phosphors as a color conversion layer. These research results are significant for developing sulfur-based luminescent materials, and also provide a solid and universal theory to produce high quality phosphors.
采用丰富且无毒的前体，通过简单的方法制备高性能荧光粉具有广阔的前景，但仍然是一项极具挑战性的任务。本文采用原位沉淀合成策略制备了具有高光致发光和热稳定性的荧光粉。硫纳米点（S-dots）作为沉淀反应的前体，并提供发光中心。结构和光学特性研究表明，S-dots 掺入到 BaSO 的基质中，并且 BaSO 对 S-dots 的表面配体或陷阱提供了钝化作用。这使得光致发光量子产率从 23%提高到 58%，并且 BaSO 基质也明显提高了热稳定性。这些优点使得以 S-dots@BaSO 复合荧光粉作为色转换层来构建基于荧光粉的发光二极管成为可能。这些研究结果对于开发基于硫的发光材料具有重要意义，也为制备高质量荧光粉提供了坚实而通用的理论依据。
