Zero-dimensional organic-inorganic hybrid zinc halide with stable broadband blue light emissions

• Published in: CrystEngComm 2024-11, Vol.26 (46), p.6585-659
• Main Authors: Zhang, Jie, Ma, Yu-Xin, Wu, Ming, He, Qing, Chen, Shuya, Ju, Ping, He, Yuan-Chun, Lei, Xiaowu
• Format: Article
• Language: English
• Subjects: Broadband; Emitters; Halides; Lead compounds; Lead free; Light emission; Light emitting diodes; Metal halides; Perovskites; Phosphors; Photoluminescence; Tetrahedra; Ultraviolet radiation; White light; Zinc
• ISSN: 1466-8033; 1466-8033
• DOI: 10.1039/d4ce00841c

Blue light emitters are an important composition of the three primary colors. Considering the instability and toxicity of three-dimensional (3D) lead halide perovskites, it is significant to explore lead-free hybrid metal halides with high luminescence efficiency and green and pollution-free synthesis processes as solid blue light-emitting materials. In this work, a novel family of zero-dimensional (0D) hybrid zinc-based halides AZnX 4 (A = N -EtPipz, DMPZ, DAPr-Pipz, and MPPZ; X = Cl and Br) based on discrete [ZnX 4 ] 2− tetrahedrons were prepared by a simple method. When excited by UV light, all the four compounds exhibited bright blue light emissions, and among them, [DAPr-Pipz]ZnBr 6 had a photoluminescence quantum yield (PLQY) of 27.68%, indicating their potential as high-efficiency blue phosphors for assembling white light-emitting diodes (LEDs). A series of zero-dimensional zinc halide materials based on [ZnX 4 ] 2− tetrahedra are prepared, which exhibit intense broadband blue light emission.