Abstract Broadband near‐infrared (NIR) phosphor‐converted light emitting diode (pc‐LED) is demanded for wearable biosensing devices, but it suffers from low efficiency and low radiance. This study reports a broadband NIR Ca 3‐ x Lu x Hf 2 Al 2+ x Si 1− x O 12 :Cr 3+ garnet phosphor with emission int...
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