Ultrahigh PLQY Lead-Free Organic-Inorganic Hybrid Zirconium-Based Perovskites in Anticounterfeiting Applications

Organic hybrid halide perovskite, which has excellent characteristics of low cost, nontoxicity, and high recognition, has attracted extensive attention in optical anticounterfeiting applications. In this paper, (TEA)(2)ZrCl6 (TEA = tetraethylammonium) single crystals (SCs) are synthesized by an easy-to-operate hydrothermal method, which exhibits excitation wavelength-dependent emission at 254 and 365 nm, respectively. Moreover, the photoluminescence quantum yield of (TEA)(2)ZrCl6 SCs achieves 84.7%, with the introduction of Sb3+ ions. (TEA)(2)ZrCl6 and doped (TEA)(2)ZrCl6 patterns can be recognized with excitation by different wavelengths. In addition, as-prepared (TEA)(2)ZrCl6 crystals show interesting radioluminescence for another anticounterfeiting model with the light yield of 17 709 photons per MeV. The experimental results indicate the novel (TEA)(2)ZrCl6 SCs have a huge potential for X-ray imaging and anticounterfeiting.

Automated summary

In this paper, (TEA)(2)ZrCl6 single crystals were synthesized by a hydrothermal method and exhibited excitation wavelength-dependent emission. The introduction of Sb3+ ions increased the photoluminescence quantum yield of (TEA)(2)ZrCl6 crystals. The crystals could be recognized using different excitation wavelengths and also showed interesting radioluminescence properties.