Manipulating Room Temperature Phosphorescence Stability of Photoactivated Materials for Multiplex Optical Applications

Photoactivated organic phosphorescent materials have emerged as promising candidates for optoelectronic applications due to their unique combination of remote controllability and dynamic response characteristics. Despite being a critical parameter governing their practical applicability, the photostability of these phosphorescent materials, particularly under prolonged illumination conditions, has not been systematically investigated to date. Here, we present a series of organic phosphorescent materials exhibiting dynamically tunable room-temperature phosphorescence (RTP) stability under continuous irradiation. These materials show RTP activation upon initial excitation, followed by significant emission attenuation during sustained exposure. Mechanistic studies reveal that the RTP attenuation is attributed to singlet oxygen-mediated oxidative damage to the phosphorescent chromophores. Through strategic incorporation of antioxidant stabilizers, we achieve remarkable photostability, maintaining 96% of maximum phosphorescence intensity after continuous irradiation for 1500 s. These findings not only elucidate fundamental photo-stabilization mechanisms of dynamic RTP but also provide a feasible approach for developing stable phosphorescent materials for advanced optoelectronic applications.