Abstract
Herein we report the achievement of a red emission and NIR emission from a lanthanide and bismuth functionalized L-type zeolite (Ln3+/Bi3+-zeolite L, Ln = Eu, Nd) prepared by a simple ion-exchange process and subsequent annealing. Fine-grained luminescent materials have been produced via this method. The morphology and size distribution of zeolite L crystals remain almost unchanged during the synthesis process as revealed by SEM images. The morphology and particle size of the obtained luminescent materials can easily be tuned by an appropriate choice of zeolite crystals. Photoluminescence studies reveal a lifetime of 1.93 ms and a 5D0 quantum efficiency (q = 66.98%) for Eu3+ in the Eu3+/Bi3+-zeolite L. In addition, a longer lifetime of 0.196 ms for Nd3+ in the annealed Nd3+/Bi3+-zeolite L has been attained compared to values for Nd3+ in the other zeolite system.
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