Quantum dot device, method of manufacturing the same, and electronic device

A quantum dot device, comprising

• a first electrode and a second electrode each having a surface opposite the other,
• a quantum dot layer between the first electrode and the second electrode,
• an electron injection layer between the second electrode and the quantum dot layer, the electron injection layer comprising inorganic nanoparticles and an organic material disposed on a surface of or between adjacent inorganic nanoparticles, and
• an electron transport layer between the quantum dot layer and the electron injection layer, the electron transport layer comprises an organic material and metal oxide nanoparticles represented by Zn1-xQxO, wherein Q is at least one metal excluding Zn, and 0≤x<0.5,
• wherein the inorganic nanoparticles of the electron injection layer are different from the metal oxide nanoparticles of the electron layer,
• wherein an amount of the organic material in the electron injection layer is from about 1 weight percent to about 25 weight percent, based on a total amount of the inorganic nanoparticles and the organic material, and
• wherein the amount of the organic material in the electron transport layer is present in about 30 wt % to about 70 wt %, based on the total amount of the metal oxide nanoparticles and the organic material in the electron transport layer.

A method of manufacturing a quantum dot device, comprising forming a first electrode,

• forming a quantum dot layer on the first electrode,
• forming an electron transport layer on the quantum dot layer, the electron transport layer comprising first inorganic nanoparticles, wherein the first inorganic nanoparticles are metal oxide nanoparticles represented by Zn1-xQxO, wherein Q is at least one metal excluding Zn, and 0≤x<0.5,
• forming an electron injection layer on the electron transport layer, the electron injection layer comprising second inorganic nanoparticles, wherein the second inorganic nanoparticles are different from the first inorganic nanoparticles, and
• forming a second electrode on the electron injection layer,
• wherein the forming of the electron injection layer comprises
• preparing a first dispersion comprising the second inorganic nanoparticles and an amount of an organic material,
• removing at least a portion of the organic material from the first dispersion to prepare a second dispersion including the second inorganic nanoparticles and a remaining portion of the organic material disposed on a surface of or between adjacent second inorganic nanoparticles, wherein an amount of the organic material in the second dispersion is less than the amount of the organic material in the first dispersion, and
• coating the second dispersion on the electron transport layer.