Rewritable Photoluminescence and Structural Color Display for Dual-Responsive Optical Encryption,Advanced Materials

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Rewritable Photoluminescence and Structural Color Display for Dual-Responsive Optical Encryption
Advanced Materials ( IF 27.4 ) Pub Date : 2023-12-25 , DOI: 10.1002/adma.202310130
Hyowon Han ₁ , Jin Woo Oh ₁ , Hyeokjung Lee ₁ , Seokyeong Lee ₁ , Seungsoo Mun ₁ , Seungbae Jeon ₂ , Dongjun Kim ₃ , Jihye Jang ₁ , Wei Jiang ₁ , Taebin Kim ₁ , Beomjin Jeong ₄ , Jiwon Kim _{3,

5,

6} , Du Yeol Ryu ₂ , Cheolmin Park _{1,

7}

Affiliation

Optical encryption using coloration and photoluminescent (PL) materials can provide highly secure data protection with direct and intuitive identification of encrypted information. Encryption capable of independently controlling wavelength-tunable coloration as well as variable light intensity PL is not adequately demonstrated yet. Herein, a rewritable PL and structural color (SC) display suitable for dual-responsive optical encryption developed with a stimuli-responsive SC of a block copolymer (BCP) photonic crystal (PC) with alternating in-plane lamellae, of which a variety of 3D and 2D perovskite nanocrystals is preferentially self-assembled with characteristic PL, is presented. The SC of a BCP PC is controlled in the visible range with different perovskite precursor doping times. The perovskite nanocrystals developed in the BCP PC are highly luminescent, with a PL quantum yield of ≈33.7%, yielding environmentally stable SC and PL dual-mode displays. The independently programmed SC and PL information is erasable and rewritable. Dual-responsive optical encryption is demonstrated, in which true Morse code information is deciphered only when the information encoded by SCs is properly combined with PL information. Numerous combinations of SC and PL realize high security level of data anticounterfeiting. This dual-mode encryption display offers novel optical encryption with high information security and anti-counterfeiting.

中文翻译：

用于双响应光学加密的可重写光致发光和结构彩色显示

使用着色和光致发光 (PL) 材料的光学加密可以通过直接直观地识别加密信息来提供高度安全的数据保护。能够独立控制波长可调着色以及可变光强度 PL 的加密尚未得到充分证明。在此，一种适用于双响应光学加密的可重写 PL 和结构色 (SC) 显示器，是用具有交替面内片层的嵌段共聚物 (BCP) 光子晶体 (PC) 的刺激响应 SC 开发的，其中有多种3D 和 2D 钙钛矿纳米晶体优先自组装，具有特征 PL。 BCP PC 的 SC 通过不同的钙钛矿前驱体掺杂时间控制在可见光范围内。 BCP PC 中开发的钙钛矿纳米晶体具有高发光性，PL 量子产率约为 33.7%，可产生环境稳定的 SC 和 PL 双模显示器。独立编程的SC和PL信息是可擦除和可重写的。演示了双响应光学加密，其中只有当 SC 编码的信息与 PL 信息正确组合时，才能破译真正的莫尔斯电码信息。 SC和PL的多种组合实现了数据防伪的高安全级别。这种双模式加密显示器提供新颖的光学加密，具有高信息安全性和防伪性。

更新日期：2023-12-25

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