Light-emitting diodes (LEDs) with different emission spectra are widely used in daily life for a variety of applications. However, due to fundamental restrictions of light-emitting materials, the development of near-infrared LEDs (NIR-LEDs) is still modest. Recently, solution-processed tin-halide perovskites (THPs) have emerged as one of the most promising light-emitting materials for NIR-LED applications. In this Perspective, we start with discussing the peculiarities of THP semiconductors and how their electronic properties affect the light emission efficiency. We then summarize the current efforts in material engineering to design and master the electronic properties of THP films. Finally we give an outlook on the future challenges and technical roadmap for tin-based perovskite LEDs.

中文翻译：

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用于近红外发光二极管的卤化锡钙钛矿

具有不同发射光谱的发光二极管（LED）广泛应用于日常生活中的各种应用。然而，由于发光材料的根本限制，近红外LED（NIR-LED）的发展仍然有限。最近，溶液加工的卤化锡钙钛矿（THP）已成为近红外 LED 应用中最有前途的发光材料之一。在本视角中，我们首先讨论 THP 半导体的特性以及它们的电子特性如何影响发光效率。然后，我们总结了当前材料工程领域在设计和掌握 THP 薄膜电子性能方面所做的努力。最后我们对锡基钙钛矿LED的未来挑战和技术路线进行了展望。