Luminance Saturation in Luminescent Material: From Fundamental Mechanisms to Anti‐Saturation Material Design

ABSTRACT

With the development of laser display technology toward higher brightness and wider color gamut, phosphor conversion materials are prone to luminance saturation under high‐power‐density laser excitation, which severely restricts further improvements in display brightness and device stability. This review summarizes recent progress in understanding the luminance saturation mechanisms of phosphor materials for laser display applications, focusing on the two major aspects of thermal quenching and optical quenching. Thermal quenching mainly involves cross‐relaxation and thermal ionization processes, whereas optical quenching is associated with mechanisms such as excited‐state absorption (ESA), ground‐state depletion (GSD), and energy‐transfer upconversion (ETU). Furthermore, various approaches for enhancing resistance to thermal quenching are systematically discussed, including increasing lattice rigidity, defect levels compensates for the emission loss, cation disordering, and thermal management through inorganic encapsulation strategies. Meanwhile, effective methods for suppressing optical quenching are summarized, such as selecting luminescent centers with short lifetimes, reducing doping concentration, and promoting material single crystallization. Finally, future research directions toward high‐power, highly stable laser‐driven phosphor materials are proposed. This review is expected to facilitate the further application of phosphor materials in the field of laser display technology.