Photoelectric device

1. A photoelectric device, comprising:

a first semiconductor structure and a second semiconductor structure on a substrate, the first semiconductor structure including a different conductivity type from the second semiconductor structure;

a first electrode on the first semiconductor structure and a second electrode on the second semiconductor structure; and

a single insulating layer integrally formed as one piece and adjacent to the second semiconductor structure, the single insulating layer separating the first semiconductor structure from the second semiconductor structure and separating the first semiconductor structure from the second electrode,

wherein the single insulating layer has a first portion and a second portion, the first portion having an inner diameter and an outer diameter, the second portion having a through hole with a diameter smaller than the inner diameter of the first portion,

wherein:

the second semiconductor structure has an island shape such that lateral sides of the second semiconductor structure are continuously surrounded by the first portion and the first semiconductor structure.

2. The photoelectric device as claimed in claim 1 , wherein the first semiconductor structure has a first region with a first area and the second semiconductor structure has a second region with a second area, the first area of the first region being greater than the second area of the second region.

3. The photoelectric device as claimed in claim 2 , wherein the first electrode and the second electrode have substantially a same width.

4. The photoelectric device as claimed in claim 1 , wherein the second electrode overlaps the first semiconductor structure and the second semiconductor structure.

5. The photoelectric device as claimed in claim 1 , wherein the single insulating layer includes a through hole, the second electrode being connected to the second semiconductor structure via the through hole.

6. The photoelectric device as claimed in claim 1 , wherein the single insulating layer includes a first portion, the first portion being between lateral sides of the first semiconductor structure and lateral sides of the second semiconductor structure on the substrate.

7. The photoelectric device as claimed in claim 6 , wherein the first portion of the single insulating layer surrounds at least a portion of lateral sides of the second semiconductor structure.

8. The photoelectric device as claimed in claim 6 , wherein the first portion of the single insulating layer surrounds entire lateral sides of the second semiconductor structure.

9. The photoelectric device as claimed in claim 6 , wherein the single insulating layer includes a second portion on the first semiconductor structure such that the second portion is between the second electrode and the first semiconductor structure.

10. The photoelectric device as claimed in claim 9 , wherein the first and second portions of the single insulating layer are integrally formed as one piece.

11. The photoelectric device as claimed in claim 9 , wherein a width of the second portion of the single insulating layer along a first direction is greater than a width of the second electrode along the first direction, the first direction being a direction extending between the first and second electrodes.

12. The photoelectric device as claimed in claim 1 , further comprising a gap insulating layer, the gap insulating layer surrounding a portion of lateral sides of the second semiconductor structure, and the single insulating layer being on the gap insulating layer.

13. The photoelectric device as claimed in claim 1 , wherein an upper surface of the first electrode is at a first distance from the substrate, and an upper surface of the second electrode is at a second distance from the substrate, the second distance being greater than the first distance.

14. The photoelectric device as claimed in claim 1 , wherein the single insulating layer and the first electrode are arranged along a horizontal line extending in a direction between the single insulating layer and the first electrode.

15. The photoelectric device as claimed in claim 1 , further comprising:

a passivation layer on the substrate, the passivation layer being on a side of the substrate opposite the first and second semiconductor structures; and

an antireflection layer on the passivation layer.

16. The photoelectric device as claimed in claim 1 , wherein the first semiconductor structure includes a first intrinsic layer on the substrate, a first conductive semiconductor layer on the first intrinsic layer, and a first transparent conductive layer on the first intrinsic layer and the first conductive semiconductor layer.

17. The photoelectric device as claimed in claim 16 , wherein the first transparent conductive layer covers lateral sides of the first intrinsic layer and the first conductive semiconductor layer and covers an upper surface of the first conductive semiconductor layer.

18. The photoelectric device as claimed in claim 16 , wherein:

the second semiconductor structure includes a second intrinsic layer on the substrate, a second conductive semiconductor layer on the second intrinsic layer, and a second transparent conductive layer on the second intrinsic layer and the second conductive semiconductor layer, and

the first conductive semiconductor layer has the different conductivity type from the second conductive semiconductor layer.

19. The photoelectric device as claimed in claim 18 , wherein the second transparent conductive layer covers lateral sides of the second intrinsic layer and the second conductive semiconductor layer and covers an upper surface of the second conductive semiconductor layer.