Quantum dot device and electronic device

A quantum dot device, comprising

• an anode and a cathode spaced apart from each other,
• a light emitting layer disposed between the anode and the cathode, the light emitting layer comprising quantum dots;
• a first hole auxiliary layer disposed between the anode and the light emitting layer, the first hole auxiliary layer comprising poly (3,4-ethylenedioxythiophene) polystyrenesulfonate or a derivative thereof (PEDOT:PSS),
• a second hole auxiliary layer disposed between the first hole auxiliary layer and the light emitting layer, the second hole auxiliary layer comprising a hole transport material different from a material of the first hole auxiliary layer,
• wherein the first hole auxiliary layer has a first surface facing the anode and a second surface facing the second hole auxiliary layer, and
• the second surface of the first hole auxiliary layer comprises a surface modification region comprising a surface modification material including a carboxylic acid group, a phosphonic acid group, a sulfonic acid group, or a salt thereof,
• wherein in the first hole auxiliary layer a volume of the surface modification material is less than a volume of the PEDOT:PSS.