Optical characteristics of luminescent materials, including emission color (wavelength), lifetime, and excitation mode, play crucial roles in data communication and information security. Conventional luminescent materials generally display unicolor, unitemporal, and unimodal (occasionally bimodal) emission, resulting in low‐level readout and decoding. The development of multicolor, multitemporal, and multimodal luminescence in a single material has long been considered to be a significant challenge. In this study, for the first time, the superior integration of colorful (red–orange–yellow–green), bitemporal (fluorescent and delayed), and four‐modal (thermo‐/mechano‐motivated and upconverted/downshifted) emissions in a particular piezoelectric particle via optical multiplexing of dual‐lanthanide dopants is demonstrated. The as‐prepared versatile NaNbO₃:Pr³⁺,Er³⁺ luminescent microparticles shown are particularly suitable for embedding into polymer films to achieve waterproof, flexible/wearable and highly stretchable features, and synchronously to provide multidimensional codes that can be visually read‐out using simple and commonly available tools (including the LED of a smartphone, pen writing, cooling–heating stimuli, and ultraviolet/near‐infrared lamps). These findings offer unique insight for designing highly integrated stimuli‐responsive luminophors and smart devices toward a wide variety of applications, particularly advanced anticounterfeiting technology.

中文翻译：

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通过双镧系元素在压电粒子中的多重合成及其多维防伪，实现热机械光响应双时相彩色发光。

发光材料的光学特性，包括发射颜色（波长），寿命和激发模式，在数据通信和信息安全中起着至关重要的作用。常规的发光材料通常显示单色，单位时间和单峰（有时为双峰）发射，从而导致低电平读取和解码。长期以来，人们一直认为在单一材料中开发多色，多时相和多峰发光是一项重大挑战。在本研究中，这是首次将彩色（红色-橙色-黄色-绿色），双时相（荧光和延迟）和四模式（热/机械动力以及上转换/下移）的发射进行了出色的集成。通过双镧系元素掺杂剂的光学多路复用，展示了一种特定的压电粒子。₃：所示的Pr ³⁺，Er ³⁺发光微粒特别适合嵌入聚合物薄膜中以实现防水，柔性/可穿戴和高度可拉伸的特征，并同步提供多维代码，这些代码可以使用简单且常用的方法在视觉上读出工具（包括智能手机的LED，笔书写，冷却-加热刺激和紫外线/近红外灯）。这些发现为针对各种应用，特别是先进的防伪技术设计高度集成的刺激响应发光体和智能设备提供了独特的见识。