Grzegorz Leniec

Enabling Efficient NIR‐III Emission Under 808 nm Excitation Through Tm 3+ to Ho 3+ Energy Transfer

ABSTRACT Near‐infrared‐III (NIR‐III, 1700–2500 nm) phosphors are promising for deep‐tissue imaging and long‐wavelength photonic applications but are limited by weak excitation compatibility, low efficiency, and severe thermal quenching. Here, we report a Y 2 GeO 5 :Tm 3+ ,Ho 3+ p...