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physics.optics2026

NaBiF: Er, Yb upconversion particle as a multi-functional bio-marker

Atanu Ghosh, Krishna Kumari Swain, Agniva Das +6

The paper presents bismuth‑doped NaBiF4:Er³⁺,Yb³⁺ upconversion particles that show markedly higher quantum yield and controllable photoluminescence using two infrared lasers, enabl…