Synchronously improved luminescence efficiency and thermal stability of organic–inorganic chloride single crystals through doping of Sb 3

Herein, (CH 3 ) 4 NMnCl 3 doped with Sb 3+ 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 Sb 3+ not only improves the excitation intensity in the blue-light region but also red emission only from Mn 2+ . The emission intensity ( I e ) of (CH 3 ) 4 NMnCl 3 :0.5%Sb 3+ is about 1.5 times higher than that of (CH 3 ) 4 NMnCl 3 . 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 Sb 3+ can effectively transfer energy to Mn 2+ . Moreover, the doping of Sb 3+ is beneficial to the thermal stability. The I e of (CH 3 ) 4 NMnCl 3 :0.5%Sb 3+ at 150 °C is about 1.2 times higher than that of (CH 3 ) 4 NMnCl 3 at 25 °C. Meanwhile, the white LED based on (CH 3 ) 4 NMnCl 3 :0.5%Sb 3+ also exhibits good optoelectronic performance. Hence, this work provides a new strategy to explore hybrid manganese( ii ) chlorides for white LEDs.