Quantum dot phosphors free from hazardous elements: Current status and prospects for established materials and new ZnTe‐based alloys,Journal of the Society for Information Display

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Quantum dot phosphors free from hazardous elements: Current status and prospects for established materials and new ZnTe‐based alloys
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2020-06-17 , DOI: 10.1002/jsid.948
Satoshi Tsukuda ₁ , Takahisa Omata ₁

Affiliation

Television broadcasts are moving to a digital video format based on ultra‐high‐definition (UHD). In addition to high resolution, such UHD displays require a wide color gamut. Quantum dots (QDs) have narrow and color‐tunable emission making these unique light sources for achieving a wide color gamut. Most progress in QDs has been made based on cadmium‐containing materials, as represented by CdSe. These systems have excellent performance in terms of their narrow‐band emission and high emission quantum yield; however, the toxicity of cadmium represents a barrier to practical applications of QD displays. Over the last decade, considerable efforts have been made to develop QDs that do not contain cadmium. Some established alternative materials include InP, CuInS₂, and lead halide perovskites. In addition, ZnTe‐based alloy QDs have recently been proposed as promising green and red phosphors. Narrow‐band and green emission (30 nm of full‐width at half‐maximum at a wavelength of 535 nm) has also been reported for Zn (Te, Se) alloy QDs. In this review article, we give a brief overview of progress in established cadmium‐free QDs and describe the current status and future challenges of new cadmium‐free QDs, ZnTe‐based alloy QDs.

中文翻译：

不含有害元素的量子点荧光粉：现有材料和新型ZnTe基合金的现状与前景

电视广播正在转向基于超高清（UHD）的数字视频格式。除了高分辨率之外，这种UHD显示器还需要宽色域。量子点（QD）具有狭窄且可调节颜色的发射，使这些独特的光源可实现宽广的色域。以CdSe为代表，QD的大多数进展都是基于含镉的材料。这些系统在窄带发射和高发射量子产率方面具有出色的性能。但是，镉的毒性代表了QD显示器实际应用的障碍。在过去的十年中，为开发不含镉的量子点做出了巨大的努力。一些确定的替代材料包括InP，CuInS ₂以及卤化钙钛矿。此外，最近已提出基于ZnTe的合金QD作为有希望的绿色和红色磷光体。Zn（Te，Se）合金量子点也有窄带和绿色发射（全宽30 nm，最大波长为535 nm的一半）的报道。在这篇评论文章中，我们简要概述了已建立的无镉量子点的进展，并描述了新型无镉量子点，ZnTe基合金量子点的现状和未来挑战。

更新日期：2020-06-17

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