Novel Composite of Nickel Thiocyanate?Based All?Inorganic Lead Bromide Perovskite Nanocrystals with Enhanced Luminescent and Stability for White Light?Emitting Diodes

Doping of CsPbBr3 perovskite nanocrystals (PNCs) to achieve excellent material properties is accelerating due their increasing use in optoelectronic devices. Herein, a novel composite PNCs with nickel thiocyanate Ni(SCN)2 reported, exhibiting stronger photoluminescence (PL) and more extended stability. The addition at different molar concentrations reduces the surface trap states host PNCs. Therefore, microstrain, dislocation density, PL emission linewidth, Urbach energy decrease, resulting an increased quantum yield (PLQY) from 72% high above 90%. When stored ambient atmosphere for 120 days, PLQY doped maintained by than four times compared A combination 3D-printed conversion layers containing green-, yellow-, red-emitting blue light-emitting diodes results stable white light superior color qualities. Hence, new composites desired are developed as alternative conventional phosphors.