Recently, The team of Professor Zeng Ruosheng from SKL is entitled "Thermal Enhanced Energy Transfer and High Thermal Sensitivity of Sb³⁺Doped Cs₂KYbCl₆Rare Earth Double Perovskites" was published in the Laser & Photonics Reviews.

Rare-earth based double perovskites (DPs) have attracted much attention due to stable, efficient, and unique luminescence, and wide applications in many optoelectronic fields. However, their weak near-infrared (NIR) emission and poor anti-thermal quenching severely limit the further applications. Herein, Sb³⁺-doped Cs₂KYbCl₆ DP with cyan self-trapped exciton (STE) and NIR emission is prepared by a solvothermal method, and the separate photoluminescence quantum yields from STE and NIR emission reached ≈26.1% and 43.8%, respectively. More importantly, Sb³⁺ not only contributes to the absorption and energy transfer but also helps to establish an effective thermally enhanced energy transfer channel through self-trapping state, resulting in the NIR emission with superior anti-thermal quenching resistance. The thermal sensitivity of luminescence intensity ratio (LIR) of I_{1010 nm}/I_{505 nm} (I is the intensity of PL) and time-resolved temperature sensor reach 21.4 and 13.6% K⁻¹, respectively, which are ahead of most temperature sensing materials. Furthermore, it is found that the material exhibited advanced multifunctional applications in LED lighting, flexible luminescent thin film, and NIR imaging. This work provides in-depth understanding on photophysical mechanisms of rare-earth luminescent materials and references for designing high-performance materials.