Crystals of Cr3+:Yb3+:Ln3+:YSGG as active media of solid-state lasers

Zavartsev, Yu. D.; Zagumennyĭ, A. I.; Осико, В. В.; Studenikin, P. A.; Umyskov, A F

doi:10.1070/qe1996v026n05abeh000688

Cited by 2 publications

(1 citation statement)

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“…[ 31 ] and Yao et al. [ 32 ] exploited Cr 3+ , a well‐known sensitizer in solid‐state lasers, [ 33 ] luminescent thermometer, [ 34 ] and persistent luminescence materials, [ 35 ] to sensitize Yb 3+ so that the developed NIR phosphors are rich in the spectral range of 650 to 1100 nm detectable by the inexpensive silicon photodetectors. However, both of them have an IQE of only ≈75%.…”

Section: Figurementioning

confidence: 99%

High‐Power Broadband NIR LEDs Enabled by Highly Efficient Blue‐to‐NIR Conversion

Basore

Xiao

et al. 2021

Advanced Optical Materials

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Phosphor‐converted light‐emitting diodes (pc‐LEDs) with broadband near‐infrared (NIR) emission have emerged as compact light sources for portable NIR spectroscopy. However, the associated broadband NIR phosphors suffer from low quantum efficiency (QE) and severe thermal quenching. Here the realization of highly efficient (internal QE ≈ 90%) and nearly zero‐thermal‐quenching broad NIR emission in Cr3+ and Yb3+ codoped Gd3Sc1.5Al0.5Ga3O12 (GSGG) via efficient energy transfer from Cr3+ to Yb3+ is reported, whereby a high‐performance NIR pc‐LED is obtained that can generate ultra‐broad‐band NIR emission covering the whole range of 700−1100 nm with high output power (50 mW at a current of 100 mA) and high photoelectric efficiency (24% at a current of 10 mA). The results not only demonstrate that Cr3+ and Yb3+ codoped GSGG has great potential for compact NIR light sources, but also indicate that the strategy of energy transfer can be exploited for developing new NIR phosphors with both high QE and thermal stability.

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