12.1% Record-Efficiency 986 nm Quantum-Cutting Quasi-2D Perovskite Light-Emitting Diodes for Large-Area Dual-Mode Applications.
Ytterbium-ion (Yb3+)-doped quasi-2D layered metal halide perovskites (quasi-2D LMHPs) stand out as a transformative platform for near-infrared (NIR) emissions beyond 950 nm, holding great promise for revolutionizing next-generation photonic systems. Herein, we report a synergistic engineering strategy to simultaneously...