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Intense Hydrochromic Photon Upconversion from Lead-Free 0D Metal Halides For Water Detection and Information Encryption
Advanced Materials ( IF 27.4 ) Pub Date : 2023-07-03 , DOI: 10.1002/adma.202302442 Joo Hyeong Han 1 , Tuhin Samanta 1 , Han Bin Cho 1 , Sung Woo Jang 1 , N S M Viswanath 1 , Yu Ri Kim 1 , Jeong Min Seo 1 , Won Bin Im 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-07-03 , DOI: 10.1002/adma.202302442 Joo Hyeong Han 1 , Tuhin Samanta 1 , Han Bin Cho 1 , Sung Woo Jang 1 , N S M Viswanath 1 , Yu Ri Kim 1 , Jeong Min Seo 1 , Won Bin Im 1
Affiliation
Hydrochromic materials that change their luminescence color upon exposure to moisture have attracted considerable attention owing to their applications in sensing and information encryption. However, the existing materials lack high hydrochromic response and color tunability. This study reports the development of a new and bright 0D Cs3GdCl6 metal halide as the host for hydrochromic photon upconversion in the form of polycrystals (PCs) and nanocrystals. Lanthanides co-doped cesium gadolinium chloride metal halides exhibit upconversion luminescence (UCL) in the visible–infrared region upon 980 nm laser excitation. In particular, PCs co-doped with Yb3+ and Er3+ exhibit hydrochromic UCL color change from green to red. These hydrochromic properties are quantitatively confirmed through the sensitive detection of water in tetrahydrofuran solvent via UCL color changes. This water-sensing probe exhibits excellent repeatability and is particularly suitable for real-time and long-term water monitoring. Furthermore, the hydrochromic UCL property is exploited for stimuli-responsive information encryption via cyphertexts. These findings will pave the way for the development of new hydrochromic upconverting materials for emerging applications, such as noncontact sensors, anti-counterfeiting, and information encryption.
中文翻译:
用于水检测和信息加密的无铅 0D 金属卤化物的强水变色光子上转换
由于其在传感和信息加密方面的应用,在暴露于湿气时改变其发光颜色的水变色材料引起了相当大的关注。然而,现有材料缺乏高水变色响应和颜色可调性。这项研究报告了一种新型明亮的 0D Cs 3 GdCl 6金属卤化物的开发,作为多晶 (PC) 和纳米晶体形式的水变色光子上转换的主体。镧系元素共掺杂氯化铯金属卤化物在 980 nm 激光激发下在可见光-红外区域表现出上转换发光 (UCL)。特别是,共掺杂Yb 3+和Er 3+的PC表现出从绿色到红色的水变色UCL颜色变化。这些水变色特性通过 UCL 颜色变化灵敏检测四氢呋喃溶剂中的水来定量确认。该水敏探头具有出色的重复性,特别适合实时和长期的水体监测。此外,水变色 UCL 特性可用于通过密文进行刺激响应信息加密。这些发现将为开发用于非接触式传感器、防伪和信息加密等新兴应用的新型水变色上转换材料铺平道路。
更新日期:2023-07-03
中文翻译:
用于水检测和信息加密的无铅 0D 金属卤化物的强水变色光子上转换
由于其在传感和信息加密方面的应用,在暴露于湿气时改变其发光颜色的水变色材料引起了相当大的关注。然而,现有材料缺乏高水变色响应和颜色可调性。这项研究报告了一种新型明亮的 0D Cs 3 GdCl 6金属卤化物的开发,作为多晶 (PC) 和纳米晶体形式的水变色光子上转换的主体。镧系元素共掺杂氯化铯金属卤化物在 980 nm 激光激发下在可见光-红外区域表现出上转换发光 (UCL)。特别是,共掺杂Yb 3+和Er 3+的PC表现出从绿色到红色的水变色UCL颜色变化。这些水变色特性通过 UCL 颜色变化灵敏检测四氢呋喃溶剂中的水来定量确认。该水敏探头具有出色的重复性,特别适合实时和长期的水体监测。此外,水变色 UCL 特性可用于通过密文进行刺激响应信息加密。这些发现将为开发用于非接触式传感器、防伪和信息加密等新兴应用的新型水变色上转换材料铺平道路。