Efficient near-infrared photoluminescence and thermal stability in Mo4+ doped lead-free halide perovskites

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

Optical Materials Pub Date : 2025-07-21 DOI:10.1016/j.optmat.2025.117341

Chao Wang , Junlin Wang , Dongting Wang

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引用次数: 0

Abstract

In this work, we synthesized zero-dimensional (0D) Cs₂Hf(ClBr)₆: Mo⁴⁺ perovskite powder using acid precipitation method, achieving excellent broadband near-infrared (NIR) emission performance. The emission spectrum covers the infrared wavelength range of 750–1100 nm, with a center at 900 nm and a full width at half maximum of 125 nm. The near-infrared phosphor converted LED made of this material exhibits excellent stability in the range of 100 mÃ600 mA. The pc-LEDs still maintains a luminescence intensity of over 90 % even after being continuously powered on for 6 h at different currents. The temperature-dependent (80−480 K) NIR PL spectra also shows good thermal stability. In addition, this material and its LED exhibit efficient near-infrared emission in the near-infrared region, demonstrating excellent performance in applications such as vein photography, night vision and non-destructive testing of circuit boards. This study brings new ideas to the near-infrared emission theory and material design of perovskite materials and lays the foundation for their practical applications in the near-infrared field.

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Mo4+掺杂无铅卤化物钙钛矿的高效近红外发光和热稳定性

本文采用酸沉淀法合成了零维（0D） Cs2Hf(ClBr)6: Mo4+钙钛矿粉体，具有优异的宽带近红外（NIR）发射性能。发射光谱覆盖750 - 1100nm的红外波长范围，中心为900nm，半宽为125nm。该材料制成的近红外荧光粉转换LED在100 mÃ600 mA范围内表现出优异的稳定性。在不同电流下连续通电6小时后，pc- led的发光强度仍保持在90%以上。温度相关（80 ~ 480 K）的近红外PL光谱也显示出良好的热稳定性。此外，该材料及其LED在近红外区域表现出高效的近红外发射，在静脉摄影，夜视和电路板无损检测等应用中表现出优异的性能。本研究为钙钛矿材料的近红外发射理论和材料设计带来了新的思路，为其在近红外领域的实际应用奠定了基础。

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

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.