Opto-electronic device having junction field-effect transistor structure and image sensor including the opto-electronic device

An image sensor comprising:

• an array of opto-electronic devices;
• and
• a driving circuit configured to output a signal from each of the opto-electronic devices,
• wherein each of the opto-electronic devices comprises:
• a first semiconductor layer of a first conductivity type;
• a second semiconductor layer of a second conductivity type provided on an upper surface of the first semiconductor layer, the second conductivity type being electrically opposite to the first conductivity type;
• a transparent matrix layer provided on an upper surface of the second semiconductor layer;
• a plurality of quantum dots arranged to be in contact with the transparent matrix layer;
• and
• a first electrode provided on a first side of the transparent matrix layer and a second electrode provided on a second side of the transparent matrix layer opposite to the first side, wherein the first electrode and the second electrode are electrically connected to the second semiconductor layer,
• wherein the first semiconductor layer is doped to have a first doping concentration, and the second semiconductor layer is doped to have a second doping concentration less than the first doping concentration.

A junction field effect transistor (JFET) comprising:

• a first semiconductor layer;
• a second semiconductor layer provided on an upper surface of the first semiconductor layer;
• a transparent matrix layer provided on an upper surface of the second semiconductor layer;
• a plurality of quantum dots in contact with the transparent matrix layer;
• and
• a first electrode provided on a first side of the transparent matrix layer and a second electrode provided on a second side of the transparent matrix layer,
• wherein the first semiconductor layer is doped to have a first doping concentration, and the second semiconductor layer is doped to have a second doping concentration less than the first doping concentration.