Efficient Room-Temperature Phosphorescence in 2D Perovskite via Mixed Organic Cation Incorporation.

The achievement of RTP in hybrid organic-inorganic perovskites (HIOPs) via molecular engineering remains relatively uncommon. Here, a series of novel 2D HIOPs composed of mixed organic cations such as naphthalene methylamine (NMA) and 2-(4-methylphenyl) ethanamine (4MPEA) are reported. Efficient RTP and tunable emissions ranging from green to yellow to orange, depending on the doping ratio, are activated in the organic cation-mixed 2D HIOPs system.