Method for manufacturing solar cell and solar cell made thereby

Patent metadata

Field	Value
Publication number	US-2015155824-A1
Application number	US-201414519369-A
Country	US
Kind code	A1
Filing date	Oct 21, 2014
Priority date	Nov 29, 2013
Publication date	Jun 4, 2015
Grant date	—

Abstract

A method for manufacturing a solar cell including a solar cell panel having a light receiving surface and an optical film formed on the light receiving surface includes providing a solar cell panel comprising a light receiving surface, preparing a coating solution comprising a birefringent material having a relative refraction index of about 1.05 to about 2.5, a transparent adhesive, and an organic solvent, coating the light receiving surface with the coating solution, thereby forming a liquid layer of the coating solution on the light receiving surface, and curing the liquid layer to form an optical film on the light receiving surface. Light-absorbing efficiencies of the solar cell under non-zero light incident angles on the light receiving surface are increased.

First claim

What is claimed is:

1 . A solar cell comprising:
a solar cell panel comprising a light receiving surface; and an optical film formed on the light receiving surface, the optical film comprising a birefringent material having a relative refraction index of about 1.05 to about 2.5 and a transparent adhesive.

2 . The solar cell of claim 1 , wherein the solar cell panel is selected from the group consisting of a silicon semiconductor solar cell panel, a cadmium telluride thin film solar cell panel, a copper indium gallium selenide thin film solar cell panel, a III-V compound semiconductor solar cell panel, and an organic material solar cell panel.

3 . The solar cell of claim 2 , wherein the light receiving surface is a planar surface.

4 . The solar cell of claim 2 , wherein the light receiving surface is etched to be a randomly rough surface.

5 . The solar cell of claim 2 , wherein the light receiving surface is covered by regular three-dimensional structures.

6 . The solar cell of claim 1 , wherein the birefringent material changes a transmission direction of light and enables non-perpendicular incident light beams to pass through the optical film to be perpendicularly incident on the light receiving surface.

7 . The solar cell of claim 6 , wherein the birefringent material is a liquid crystal.

8 . The solar cell of claim 7 , wherein the liquid crystal is a liquid crystal polymer.

9 . The solar cell of claim 6 , wherein the birefringent material is one or more selected from the group consisting of quartz, calcite, and ruby.

10 . The solar cell of claim 1 , wherein the optical film has a thickness of about 1 nm to about 500 μm.

11 . A method for manufacturing a solar cell, comprising:
providing a solar cell panel comprising a light receiving surface; preparing a coating solution comprising a birefringent material having a relative refraction index of about 1.05 to about 2.5, a transparent adhesive, and an organic solvent; coating the light receiving surface with the coating solution, thereby forming a liquid layer of the coating solution on the light receiving surface; and curing the liquid layer to form an optical film on the light receiving surface.

12 . The method of claim 11 , wherein within the coating solution, the birefringent material has a weight percentage in a range from about 0.1% to about 33%.

13 . The method of claim 12 , wherein the birefringent material is a liquid crystal.

14 . The method of claim 13 , wherein the liquid crystal has a weight percentage in a range from about 0.1% to about 5% base on a total weight of the coating solution.

15 . The method of claim 13 , wherein the liquid crystal is a liquid crystal polymer.

16 . The method of claim 12 , wherein the birefringent material is one or more selected from the group consisting of quartz, calcite, and ruby.

17 . The method of claim 12 , wherein the liquid layer of the coating solution has a thickness of about 5 nm to about 800 μm.

18 . The method of claim 11 , wherein the solar cell panel is selected from the group consisting of a silicon semiconductor solar cell panel, a cadmium telluride thin film solar cell panel, a copper indium gallium selenide thin film solar cell panel, a III-V compound semiconductor solar cell panel, and an organic material solar cell panel.

Assignees

• Chiun Mai Comm Systems Inc

Inventors

• Chien How-Wen

Classifications

• H02S40/22 Primary

  Light-reflecting or light-concentrating means (directly associated with the PV cell or integrated with the PV cell H10F77/42) · CPC title

• Y02E10/549

  Organic PV cells · CPC title

• Y02E10/52

  PV systems with concentrators · CPC title

• H10F77/484

  Refractive light-concentrating means, e.g. lenses · CPC title

• H10F71/00

  Manufacture or treatment of devices covered by this subclass (patterning processes to connect thin photovoltaic cells in integrated devices, or assemblies of multiple devices, having photovoltaic cells H10F19/33; manufacture or treatment of encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells H10F19/80; manufacture or treatment of integrated devices, or assemblies of multiple devices, comprising at least one element in which radiation controls the flow of current H10F39/00) · CPC title