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Mo4+-Doped Cs4ZnBi2Cl12 Lead-Free Double Perovskite for Near-Infrared Luminescence
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AI
J
Z
X
L
L
D
J
王
DOI：10.1002/bio.70352.png)
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Abstract
En 中文
This study presents the synthesis of Mo4+-doped Cs4ZnBi2Cl12 double perovskite through a hydrothermal method, demonstrating efficient near-infrared (NIR) emission at 1110 nm with a full width at half maximum (FWHM) of 45 nm. The emission originates from the d-d transition of Mo4+ ions within an octahedral crystal field. Structural analysis using powder X-ray diffraction (PXRD) confirms the phase purity and lattice contraction as a result of Mo4+ substitution at Bi3+ sites, supported by X-ray photoelectron spectroscopy (XPS) and elemental mapping. The material exhibits broad excitation compatibility (348–590 nm) and achieves a photoluminescence quantum yield (PLQY) of 45.3% with a microsecond-scale lifetime of 6.78 μs. Thermal stability tests demonstrate sustained emission intensity (58% at 420 K) and resilience to prolonged heating or UV exposure. This work highlights Mo4+-doped Cs4ZnBi2Cl12 as a stable and efficient NIR emitter, advancing lead-free perovskites for optoelectronic applications in bioimaging, agriculture, and sensing.
Keywords:
double perovskite
Mo4 +
NIR
photoluminescence
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