Transition-metal-ion-doped quantum dots (QDs) are promising
candidates
to fabricate full-spectrum white-light-emitting diodes (WLEDs). In
this work, a series of efficient white-light-emitting Cu,Mn-codoped
ZnGaS/ZnS (Cu,Mn:ZnGaS/ZnS) QDs were synthesized by controlling the
Zn/Ga molar ratio and the amounts of Mn dopants. After ZnS shelling,
the photoluminescence quantum yield reached 58% and the spectrum almost
covered the whole visible spectrum. Further, the stepwise doping process
was investigated, which had considerable reference value to subsequent
research. The Cu,Mn:ZnGaS/ZnS QDs were employed to fabricate WLEDs
displaying a color rendering index of 94 and CIE coordinates of (0.34,
0.35).