Synchronously improved luminescence efficiency and thermal stability of organic-inorganic chloride single crystals through doping of Sb3+

Herein, (CH3)4NMnCl3 doped with Sb3+ single crystals were grown at room temperature. The crystal structure was confirmed by the single-crystal X-ray diffraction at 293 K. The doping of Sb3+ not only improves the excitation intensity in the blue-light region but also red emission only from Mn2+. The emission intensity (Ie) of (CH3)4NMnCl3:0.5%Sb3+ is about 1.5 times higher than that of (CH3)4NMnCl3. The internal and external quantum yield (IQY and EQY) values excited by 450 nm light for the former are 78.6% and 16.0%, which are much higher than those of the latter (56.3% and 10.7%), indicating that Sb3+ can effectively transfer energy to Mn2+. Moreover, the doping of Sb3+ is beneficial to the thermal stability. The Ie of (CH3)4NMnCl3:0.5%Sb3+ at 150 degrees C is about 1.2 times higher than that of (CH3)4NMnCl3 at 25 degrees C. Meanwhile, the white LED based on (CH3)4NMnCl3:0.5%Sb3+ also exhibits good optoelectronic performance. Hence, this work provides a new strategy to explore hybrid manganese(ii) chlorides for white LEDs.