Solar cell module
A solar cell module is discussed. The solar cell module is defined with an effective area and a dead area, and includes a solar cell, and a substrate disposed at one surface of the solar cell. The substrate includes a light refraction pattern formed to correspond to the dead area.
1. A solar cell module comprising:
a plurality of solar cells which are serially connected with ribbons;
a front substrate disposed at one surface of the plurality of solar cells;
a rear substrate disposed at another surface of the plurality of solar cells;
a first sealing layer disposed between the plurality of solar cells and the front substrate; and
a second sealing layer disposed between the plurality of solar cells and the rear substrate,
wherein the front substrate comprises:
a transparent glass having a first surface facing the plurality of the solar cells and a second surface opposite to the first surface;
a convex portion locally printed on the second surface of the transparent glass and corresponding to the ribbons; and
a light refraction pattern film formed over the convex portion and the transparent glass and having a light refraction pattern having a convex shape corresponding to the convex portion,
wherein a refractive index of the convex portion is different from a refractive index of the light refraction pattern film,
wherein the light refraction pattern film is formed of a thermoplastic polymer,
wherein the light refraction pattern refracts and concentrates incident light,
wherein the light refraction pattern has a shape that extends along areas where the ribbons are formed, and
wherein, at the light refraction pattern, a first surface of the light refraction pattern film facing the convex portion and a second surface of the light refraction pattern film that is opposite the first surface both have a curved surface.
2. The solar cell module according to claim 1 , wherein the solar cell module further comprises a plurality of light refraction patterns arranged to form a lattice shape such that the plurality of solar cells are disposed within the plurality of light refraction patterns, respectively.
3. The solar cell module according to claim 1 , wherein:
the plurality of solar cells are arranged in a form of a matrix having a plurality of rows and a plurality of columns;
a peripheral area comprises first peripheral areas each defined between adjacent ones of the plurality of solar cells arranged in adjacent ones of the plurality of rows of the plurality of solar cells, respectively, second peripheral areas each defined between adjacent ones of the plurality of solar cells arranged in adjacent ones of the plurality of columns of the plurality of solar cells, respectively, and third peripheral areas respectively defined in spaces where the first peripheral areas and the second peripheral areas cross each other; and
the light refraction pattern comprises at least first refraction patterns formed at positions overlapping with corresponding ones of the first peripheral areas, respectively, second refraction patterns formed at positions overlapping with corresponding ones of the second peripheral areas, respectively, or third refraction patterns formed at positions overlapping with corresponding ones of the third peripheral areas, respectively.
4. The solar cell module according to claim 3 , wherein the third refraction patterns are disposed in the third peripheral areas, respectively.
5. The solar cell module according to claim 3 , wherein at least the first refraction patterns, the second refraction patterns, or the third refraction patterns are disposed to overlap with the plurality of solar cells, respectively.
6. The solar cell module according to claim 1 , further comprising at least one protective film that comprises an anti-reflective film.
7. The solar cell module according to claim 1 , wherein the front substrate is formed with an alignment mark for aligning a light refraction pattern with a dead area.
8. The solar cell module according to claim 1 , wherein the convex portion has edge parts and a middle part that is between the edge parts, and
wherein the middle part is thicker than the edge parts.
9. The solar cell module according to claim 1 , wherein the convex portion has a curved cross-section or a triangular cross-section.
10. The solar cell module according to claim 1 , wherein the first and second surfaces of the light refraction pattern film are flat in areas not over the convex portion.