具有非损伤、快速检测特点的近红外光谱技术与近红外成像技术在食品成分检测、癌症早期诊断、脑科学等领域获得了越来越多应用, 其面临的技术瓶颈之一就是缺乏一种具有小型化、快速响应特点的宽带近红外光源。为解决该问题, 荧光粉转化的宽带近红外LED(pc-LED)逐渐在众多技术方案中脱颖而出。本综述重点总结了宽带近红外pc-LED核心材料Cr3+掺杂的宽带近红外荧光粉的研究进展, 并详细介绍了宽带近红外光源的应用背景及光源种类, 总结了Cr3+的发光特性。本综述针对Cr3+掺杂的宽带近红外荧光粉需要解决的重要问题展开讨论, 包含了效率提升、发射谱带展宽、电声耦合问题和应用探索四个方面, 以帮助读者了解该研究课题的现状、面临问题及未来发展趋势。

Near infrared spectroscopy and imaging technology had been applied in fields such as food analysis, early diagnosis of cancer, and brain science. However, this technology was still suffered from lacking of broad band near infrared (NIR) light source. To solve the problem, phosphor converted broad band NIR LED (pc-LED) developed into a promising solution. This review summarized recent progress on the decisive material of NIR pc-LED∶Cr3+ doped broad band NIR phosphors. Applications that demanding broad band NIR source, technology of current broad band NIR source, and luminescence property of Cr3+ were introduced. Some important topics for Cr3+ doped broad band NIR phosphors, such as efficiency, band width, electron-phonon coupling, and application, were also discussed. This review will help readers to understand recent progress, problems, and future of Cr3+ doped broad band NIR phosphors.