以锡粉为还原剂制备CsPb1-xSnxI3量子点及其光物理性质

IF 4.2 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Optical Materials Pub Date : 2025-09-20 DOI:10.1016/j.optmat.2025.117543

Huanqin Yu , Xia Wang , Bingqiang Cao

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引用次数: 0

摘要

制备CsPb1-xSnxI3量子点（QDs）是获得近红外光源的有效途径。Sn2+易氧化成Sn4+的问题一直是研究的热点。将Sn粉末加入到三辛烷基膦- sni2 - pbi2溶液中还原Sn4+，热注射法制备CsPb1-xSnxI3量子点。进一步表征了CsPb1-xSnxI3量子点的物相、微观结构和光物理性质。研究结果表明，CsPb1-xSnxI3量子点为立方相晶体，尺寸约为10-20 nm，且CsPb1-xSnxI3量子点的光致发光峰在近红外区域连续可调。物相和光物理性质的表征进一步证实了用Sn粉作为还原剂在top -溶液中直接还原Sn4+，为制备近红外光致发光CsPb1-xSnxI3量子点提供了新的思路。

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Preparation and photophysical properties of CsPb1-xSnxI3 quantum dots using Sn powder as reducing agent

The preparation of CsPb_1-xSn_xI₃ quantum dots (QDs) is an effective way to obtain near-infrared sources. The problem that Sn²⁺ is easily oxidized into Sn⁴⁺ has always been the focus of research. Sn powder was added to the tri-n-octylphosphine-SnI₂-PbI₂ solution to reduce Sn⁴⁺, and CsPb_1-xSn_xI₃ QDs were prepared by hot injection. The phase, microstructure and photophysical properties of CsPb_1-xSn_xI₃ QDs were further characterized. The research results show that CsPb_1-xSn_xI₃ QDs are cubic phase crystals with a size of about 10–20 nm, and the photoluminescence peak of CsPb_1-xSn_xI₃ QDs is continuously adjustable in the near-infrared region. The characterization of phase and photophysical properties further confirmed that use Sn powder as a reducing agent to directly reduce Sn⁴⁺ in TOP-solution provides a new idea for the preparation of near-infrared photoluminescent CsPb_1-xSn_xI₃ QDs.

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来源期刊

Optical Materials 工程技术-材料科学：综合

CiteScore

6.60

自引率

12.80%

发文量

1265

审稿时长

38 days

期刊介绍： Optical Materials has an open access mirror journal Optical Materials: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The purpose of Optical Materials is to provide a means of communication and technology transfer between researchers who are interested in materials for potential device applications. The journal publishes original papers and review articles on the design, synthesis, characterisation and applications of optical materials. OPTICAL MATERIALS focuses on: • Optical Properties of Material Systems; • The Materials Aspects of Optical Phenomena; • The Materials Aspects of Devices and Applications. Authors can submit separate research elements describing their data to Data in Brief and methods to Methods X.