This presentation will report our recent studies on circularly polarized luminescence and persistent luminescence enabled by spin-orbital coupling and spin-phonon coupling effects. Our experimental studies of magnetic field effects found that the circularly polarized luminescence are essentially originated from the circularly polarized orbital ordering effects when spin-orbital coupling is combined with nonlinear optical polarizable structures. Furthermore, we found that extremely slow spin-phonon coupling can be realized by combining the un-usual phonon dynamics from dipolar crystalline structures with spin-orbital coupling. Interestingly, the extremely slow spin-phonon coupling can extend the excited state dynamics from traditional time window of nano/micro-seconds to an emerging time window of seconds, leading to persistent delayed fluorescence. Therefore, spin-orbital coupling and spin-phonon coupling function as an important mechanism to generate circularly polarized luminescence persistent luminescence.

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Bin A. Hu, "Circularly polarized luminescence and persistent luminescence from spin-orbital coupling and spin-phonon coupling effects," Proc. SPIE 13122, Organic and Hybrid Light Emitting Materials and Devices XXVIII, 131220S (Presented at Organic Photonics + Electronics: August 19, 2024; Published: 30 September 2024); https://doi.org/10.1117/12.3028089.153dc6b5-d4c5-ee11-a99e-00505691c5e1.