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

摘要

Organic hybrid halide perovskite, which has excellent characteristics of lowcost, nontoxicity, and high recognition, has attracted extensive attention inoptical anticounterfeiting applications. In this paper, (TEA)_2ZrCl_6 (TEA =tetraethylammonium) single crystals (SCs) are synthesized by aneasy-to-operate hydrothermal method, which exhibits excitationwavelength-dependent emission at 254 and 365 nm, respectively. Moreover,the photoluminescence quantum yield of (TEA)_2ZrCl_6 SCs achieves 84.7%,with the introduction of Sb3+ ions. (TEA)_2ZrCl_6 and doped (TEA)_2ZrCl_6patterns can be recognized with excitation by different wavelengths. Inaddition, as-prepared (TEA)_2ZrCl_6 crystals show interestingradioluminescence for another anticounterfeiting model with the light yield of17 709 photons per MeV. The experimental results indicate the novel(TEA)_2ZrCl_6 SCs have a huge potential for X-ray imaging andanticounterfeiting.