Zhao Xianlong, Wang Na, Liu Kunjie, Yao Ruonan, Guo Zhongnan, Zhao Jing, Liu Quanlin
The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering and Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China.
Small. 2024 Dec;20(49):e2405137. doi: 10.1002/smll.202405137. Epub 2024 Sep 18.
Hybrid metal halides display a range of optical properties and hold promise for various applications such as solid-state lighting, anti-counterfeiting measures, backlight displays, and X-ray detection. The incorporation of zinc into (CHN)MnBr aims to enhance its structural rigidity and improve its narrow band green light emission properties. The resulting (CHN)ZnBr compound exhibits an identical crystal structure to (CHN)MnBr, indicating the potential for a solid solution of varying Zn and Mn ratios within this structural framework. (CHN)ZnMnBr exhibits significantly enhanced properties, including a photoluminescence quantum yield of 92%, a minimum full width at half maximum of 43 nm, and 85% retention of room temperature emission at 420 K. Additionally, crystals of (CHN)ZnCl and (CHN)ZnX (X = Br, I) are synthesized, with (CHN)ZnBr displaying luminescent color changes dependent on excitation. (CHN)ZnMnBr demonstrates reversible phase transitions and alterations in optical properties. A white light-emitting diode utilizing (CHN)ZnMnBr and commercial phosphors exhibited a color gamut of 112.2% of the National Television Standards Committee 1931 Standard. This investigation introduces a stable and highly efficient narrow-band green phosphor suitable for displays.
混合金属卤化物展现出一系列光学特性，并在诸如固态照明、防伪措施、背光显示和X射线检测等各种应用中具有潜力。将锌掺入(CHN)MnBr旨在增强其结构刚性并改善其窄带绿光发射特性。所得的(CHN)ZnBr化合物与(CHN)MnBr具有相同的晶体结构，表明在该结构框架内存在不同锌和锰比例的固溶体的可能性。(CHN)ZnMnBr表现出显著增强的特性，包括92%的光致发光量子产率、43 nm的最小半高宽以及在420 K时85%的室温发射保留率。此外，合成了(CHN)ZnCl和(CHN)ZnX（X = Br、I）的晶体，其中(CHN)ZnBr的发光颜色随激发而变化。(CHN)ZnMnBr表现出可逆的相变和光学特性的改变。利用(CHN)ZnMnBr和商用磷光体的白光发光二极管的色域为国家电视标准委员会1931标准的112.2%。本研究引入了一种适用于显示器的稳定且高效的窄带绿色磷光体。
