Spectroscopic analysis demonstrates concentration-dependent cross-relaxation in neodymium-doped ZnIn2S4 crystals, highlighting energy-transfer pathways for infrared emission.
For the first time, the investigation of the infrared photoluminescence emission (PL) and photoluminescence excitation (PLE) behavior of Nd3+-doped ZnIn2S4 crystals were studied. The observed emission peaks were attributed to radiative transitions of Nd3+ from the metastable 4F3/2 level to the lower 4I9/2, 4I11/2, and 4I13/2 levels. The influence of dopant concentration on the optical properties was examined, revealing evidence of energy transfer between neighboring Nd3+ ions. Analysis of the photoluminescence excitation spectra further confirmed that this interaction proceeds predominantly via a cross-relaxation mechanism.
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Asadullayeva et al. (2026) studied this question.
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