Patent ID: 8895840

Claim:
A photoelectric conversion device comprising: a p-layer; an n-layer; an i-layer disposed between the p-layer and the n-layer, the i-layer comprising: a wall layer including a first semiconductor; and a quantum structure portion including a second semiconductor and disposed in the wall layer, wherein: a band gap of the first semiconductor is wider than a band gap of the second semiconductor, at least one of a first region on an n-layer side of the i-layer contains a p-type impurity or a second region on a p-layer side of the i-layer contains an n-type impurity, in a case where the first region contains the p-type impurity, a relation Cp 1 <Cp 2 is satisfied, where Cp 1 denotes a concentration of the p-type impurity at a middle of the i-layer in a thickness direction of the i-layer, and Cp 2 denotes a concentration of the p-type impurity in the first region, and in a case where the second region contains the n-type impurity, a relation Cn 1 <Cn 2 is satisfied, where Cn 1 denotes a concentration of the n-type impurity at the middle of the i-layer in the thickness direction, and Cn 2 denotes a concentration of the n-type impurity in the second region; a first electrode connected to the p-layer; a second electrode connected to the n-layer; and at least one of a first insulating layer disposed between the p-layer and the first electrode or a second insulating layer disposed between the n-layer and the second electrode.