Formation of Cu-related emission centers under thermal doping of ZnS powders with CuCl and CuCl2

Role of Cu+ on ZnS:Cu p-type semiconductor films grown by sputtering: influence of substitutional Cu in the structural, optical and electronic properties

“…Moreover, interesting properties emerge when the ZnS is doped. [7][8][9] For example, luminescence in the visible range has been observed when doping with different metallic atoms such as Cu, Mg or Sn, [10][11][12][13][14][15] and interesting magnetic behavior can also be reached when doping with Co or Mn. 8,16 ZnS can crystallize into two structures: sphalerite (cubic) and wurtzite (hexagonal).…”

Solid Solution Quantum Dots with Tunable Dual or Ultrabroadband Emission for LEDs

“…Although dual ZnS­(e):Cu emission has been reported by other groups already, ,, no meaningful application in the field of optoelectronics was demonstrated, most likely due to the weak efficiency of the Cu-related emission in bulk ZnS. In our case, the quantum yields of the WQDs were on the order of 50–70% (higher for more Zn-rich QDs) and 75–82% for the CQDs, enabling applications in, e.g., solid state lighting or wavelength conversion for solar cells.…”

“…The polydispersity index (PDI) was about 0.05, indicating high-quality monodispersed nanocrystals, but typically, the ternary/binary solid solutions are compositionally inhomogeneous, causing broadening of the emission spectra even if the particle size was proven to be narrow. 37 Although dual ZnS(e):Cu emission has been reported by other groups already, 33,38,39 no meaningful application in the field of optoelectronics was demonstrated, most likely due to the weak efficiency of the Cu-related emission in bulk ZnS. In our case, the quantum yields of the WQDs were on the order of 50−70% (higher for more Zn-rich QDs) and 75−82% for the CQDs, enabling applications in, e.g., solid state lighting or wavelength conversion for solar cells.…”

A printed hybrid warm white light source : from fabrication to physics-based model

“…It is therefore postulated that the (111) twin boundary is also rich in S vacancy, which is part of the B-Cu luminescent center composition. A recent experiment on thermal doping found that the B-Cu center is localized closer to the doping surface than G-Cu centers [193]. Therefore, in our proposed model, the B-Cu and SA luminescent centers are located near the grain boundary while G-Cu centers are located in the bulk ZnS grains.…”