An electroluminescence device for printable electronics using coprecipitated ZnS:Mn nanocrystal ink

Abstract

Electroluminescence (EL) devices for printable electronics using coprecipitated ZnS:Mn nanocrystal (NC) ink are demonstrated. The EL properties of these devices were investigated along with the structural and optical properties of ZnS:Mn NCs with an emphasis on their dependence on crystal size. Transmission electron microscopy and x-ray diffraction studies revealed that the NCs, with a crystal size of 3-4 nm, are nearly monodisperse; the crystal size can be controlled by the Zn(2+) concentration in the starting solution for coprecipitation. The results of optical studies indicate the presence of quantum confinement effects; in addition, the NC surfaces are well passivated, regardless of the crystal size. Finally, an increase in the luminance of EL devices with a decrease in crystal size is observed, which suggests the excitation mechanism of ZnS:Mn NC EL devices.

Optimized doping concentration of manganese in zinc sulfide nanoparticles for yellow-orange light emission

“…Luminescent semiconducting nanocrystals have attracted widespread attention for their practical applications: optical coatings, field effect transistors, photoconductors, optical sensors, photocatalysts, electroluminescent materials and other light-emitting materials [5][6][7][8]. Zinc sulfide, a typical II-VI compound semiconductor, with a direct band gap of 3.6 eV at room temperature and 40 meV as exciton binding energy, is a very good luminescent material used in displays, sensors and lasers [9][10][11].…”

Local structure and photoluminescence properties of nanostructured Zn1‐xMnxS material

“…1 Introduction Nanocrystals have been extensively investigated in recent years due to their widespread applications in various devices such as sensors, solar cells, lasers, photocatalysts, photodetectors, infrared detectors, optical communication, colour television, flat panel display, phosphors, light emitting diodes, electroluminescent materials and other light-emitting materials [1][2][3][4][5]. This attracted attention is not only by new properties and its possible potential technological applications, but also the search for a better understanding of the physical and chemical processes that cause these new properties [4].…”

“…Nanocrystalline semiconductors have intermediate electronic properties between those of molecular structure and macrocrystalline solid, presenting a wide range of applications [1][2][3][4][5]. Among these materials, zinc sulfide (ZnS) pure or doped has received remarkable attention because of fundamental properties, versatility and potential for several technological applications [1,2,4].…”

Water-soluble ZnS:Mn/ZnS core/shell nanoparticles prepared by a novel two-step method

“…Recently, many researchers have investigated the optical properties of ZnS:Mn nanoparticles due to their unique properties and applications in electroluminescence devices [1], field emission displays [2] and sensors [3,4]. Since a large portion of the atoms are located on or near the surfaces of the nanoparticles, the surface properties have significant effect on their optical properties.…”