Photovoltaic module and manufacturing method thereof
Disclosed herein is a photovoltaic module including: a first electrode formed on a substrate; a photoelectric conversion layer formed on the first electrode; a second electrode formed on the photoelectric conversion layer; and a light transmitting back substrate disposed over the second electrode. The photovoltaic module has a color within a range of a*: −25˜0, b*: 10˜50, L*: 20˜50 in Commission Internationale de l'Eclairage (CIE) LAB color coordinate.
1. A photovoltaic module comprising:
a first electrode formed on a substrate;
a photoelectric conversion layer formed on the first electrode;
a second electrode formed on the photoelectric conversion layer; and
a light transmitting back substrate disposed over the second electrode, and
having a color within a range of a*: −25˜0, b*: 10˜50, L*: 20˜50 in Commission Internationale de l'Eclairage (CIE) LAB color coordinate.
2. The photovoltaic module of claim 1 , further comprising:
an insulating protective layer formed between the second electrode and the back substrate; and
an optical layer being formed at least one of under the substrate, between the substrate and the first electrode, between the second electrode and the insulating protective layer, between the insulating protective layer and the back substrate, and on the back substrate, and showing a color.
3. The photovoltaic module of claim 2 , wherein the optical layer is formed from a solution of which a weight ratio of a coloring pigment or dye to a solvent is 5% to 40%.
4. The photovoltaic module of claim 2 , wherein the color of the optical layer is within a range of a*: −50˜−10, b*: −60˜−10, L*: 60˜90 in the CIE LAB color coordinate.
5. The photovoltaic module of claim 2 , wherein the transmittance of the optical layer is 5% to 40% in the near UV region and is 50% to 80% in the near IR region.
6. The photovoltaic module of claim 2 , wherein the absorptance of the optical layer is 50% to 80% in the near UV region and is 10% to 25% in the near IR region.
7. The photovoltaic module of claim 1 , wherein the transmittance of the photovoltaic module is 0% to 56% in the near UV region and is 5% to 15% in the near IR region.
8. The photovoltaic module of claim 1 , wherein the absorptance of the photovoltaic module is 65% to 85% in the near UV region and is 60% to 80% in the near IR region.
9. The photovoltaic module of claim 1 , wherein the second electrode comprises at least a transmitting opening which is formed in and passes through the second electrode.