Excitation-Power-Dependent Emission Color Tuning in Mn-Doped One-Dimensional Perovskite Single Crystal

One-dimensional (1D) perovskites are ideal broadband-emitting phosphors for white-emitting diode applications. Doping Mn2+ in 1D perovskites provides a new idea to tune the materials’ light-emitting properties. Here, we report an excitation-power-dependent dual-band emission from both self-trapped excitons (STEs) and Mn dopants in individual 1D Mn-doped DMEDAPbBr4 single crystals. By changing the excitation intensity, we realize a broad and continuous color tuning range between blue and orange. The temperature-dependent photoluminescence (PL) and transient spectroscopy measurements demonstrate that the tunable emission color is enabled by the competitive transfers of excitons to the STE state and Mn2+ ions. The Mn-doped 1D perovskites exhibit a high photostability by showing a continuous switch between blue and orange emissions during an uninterrupted operation time of 7.5 h. The high stability and emission-color switchable properties make the Mn-doped 1D perovskites special optically tunable PL materials for potential light-emitting applications.