Shining Transparent Displays with Stable Narrow-Band Blue-Emitting Phosphor in Layered Film,Advanced Materials

当前位置： X-MOL 学术 › Adv. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Shining Transparent Displays with Stable Narrow-Band Blue-Emitting Phosphor in Layered Film
Advanced Materials ( IF 27.4 ) Pub Date : 2022-10-05 , DOI: 10.1002/adma.202206278
Weijie Zhou ₁ , Yiyi Ou ₂ , Lin Huang ₂ , Enhai Song ₁ , Fengkai Ma ₂ , Zhiguo Xia _{1,

3} , Hongbin Liang ₂ , Qinyuan Zhang _{1,

3}

Affiliation

Transparent displays (TDs) rendering “levitating” images on screen have appeared as an emerging technology toward augmented/mixed reality applications. However, the traditional phosphor design and screen construction have severely limited the TD performance owing to the lack of efficient narrow-band blue emitters and stable screen structure. Herein, the novel narrow-band (full width at half maximum: 32 nm) NaLi₃SiO₄:Eu²⁺ phosphor with a peak at 467 nm as a key blue emitter is explored, and it is sandwiched in layered film as a unique screen design. The devised screen features decent transparency, high emission color purity, and good reliability, and the TD prototype renders “floating” static images and vivid animation with broad viewing angle (15°–165°) and large color gamut (97% of National Television Standards Committee). Spectroscopic and microstructural characterizations reveal the TD superior performance originates from synergistic contributions of moderate crystal field effect (ε_c ≈ 1.13 eV; ε_cfs ≈ 1.60 eV), weak vibronic coupling (S ≈ 3; ħω ≈ 285 cm⁻¹), and limited thermal ionization of 5d electrons (E_a ≈ 0.43 eV) for NaLi₃SiO₄:Eu²⁺ emission and layered architecture for screen film. These findings establish fundamental guidelines for narrow-band emitting materials design and shine light on superior TD innovative development.

中文翻译：

在分层薄膜中使用稳定的窄带蓝色发光荧光粉发光透明显示器

在屏幕上呈现“悬浮”图像的透明显示器 (TD) 已作为增强/混合现实应用的新兴技术出现。然而，由于缺乏高效的窄带蓝光发射体和稳定的屏幕结构，传统的荧光粉设计和屏幕结构严重限制了 TD 性能。在此，新型窄带（半峰全宽：32 nm）NaLi ₃ SiO ₄ :Eu ²⁺探索了峰值在 467 nm 的荧光粉作为关键的蓝色发射体，并将其夹在分层薄膜中作为独特的屏幕设计。设计的屏幕透明度好，发射色纯度高，可靠性好，TD样机呈现“漂浮”的静态图像和生动的动画，具有宽视角（15°–165°）和大色域（97%的国家电视台）标准委员会）。光谱和微观结构表征表明，TD 的优越性能源于中等晶体场效应（ε _c ≈ 1.13 eV；ε _cfs ≈ 1.60 eV）、弱电子振动耦合（S ≈ 3；ħω ≈ 285 cm ^-1）和有限的协同贡献5d 电子的热电离 ( E_a ≈ 0.43 eV) 对于 NaLi ₃ SiO ₄ :Eu ²⁺发射和屏幕薄膜的分层结构。这些发现为窄带发射材料设计建立了基本准则，并为卓越的 TD 创新开发提供了亮点。

更新日期：2022-10-05

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南