Photovoltaic cell and manufacturing method of photovoltaic cell

Patent metadata

Field	Value
Publication number	US-2016276503-A1
Application number	US-201615068959-A
Country	US
Kind code	A1
Filing date	Mar 14, 2016
Priority date	Mar 19, 2015
Publication date	Sep 22, 2016
Grant date	—

Abstract

A photovoltaic cell includes a translucent substrate; a photoelectric conversion element disposed on a light emission surface of the substrate; and a light guide member disposed on a light incidence surface of the substrate, at a position opposite the photoelectric conversion element across the substrate. A photovoltaic cell is manufactured by forming a first hydrophilic region on a light incidence surface of a translucent substrate, disposing a light guide member within the first hydrophilic region, forming a second hydrophilic region on a light emission surface of the substrate, and disposing a photoelectric conversion element in the second hydrophilic region.

First claim

What is claimed is:

1 . A photovoltaic cell comprising:
a translucent substrate; a photoelectric conversion element disposed on a light emission surface of the substrate; and a light guide member disposed on a light incidence surface of the substrate, at a position opposite the photoelectric conversion element across the substrate.

2 . The photovoltaic cell according to claim 1 , further comprising:
a condenser lens, wherein the condenser lens is disposed at a position opposite the photoelectric conversion element across the substrate and the light guide member.

3 . The photovoltaic cell according to claim 1 ,
wherein a water-repellant material is provided to enclose the photoelectric conversion element and the light guide member on the light emission surface and the light incidence surface of the substrate.

4 . The photovoltaic cell according to claim 3 ,
wherein the light incidence surface of the substrate includes a first hydrophilic region which is enclosed by the water-repellant material and on which the light guide member is disposed, the light emission surface of the substrate includes a second hydrophilic region which is enclosed by the water-repellant material and on which the photoelectric conversion element is disposed, and an area of the second hydrophilic region is larger than an area of the first hydrophilic region.

5 . The photovoltaic cell according to claim 4 , wherein the first hydrophilic region and the second hydrophilic region have a rectangular shape.

6 . A manufacturing method of a photovoltaic cell, the method comprising:
forming a first hydrophilic region on a light incidence surface of a translucent substrate; disposing a light guide member within the first hydrophilic region; forming a second hydrophilic region on a light emission surface of the substrate, at a position opposite the light guide member across the substrate; and disposing a photoelectric conversion element in the second hydrophilic region.

7 . The manufacturing method of a photovoltaic cell according to claim 6 , wherein the first hydrophilic region and the second hydrophilic region are formed by an exposure process.

8 . The manufacturing method of a photovoltaic cell according to claim 7 , further comprising:
disposing a condenser lens on an optical axis passing through the light guide member and the photoelectric conversion element on a light incidence surface of the substrate.

9 . The manufacturing method of a photovoltaic cell according to claim 8 , wherein the exposure process for the second hydrophilic region is performed using light after passing through the condenser lens.

10 . The manufacturing method of a photovoltaic cell according to claim 7 , wherein the second hydrophilic region is formed by exposure to light passing through the light guide member, after the light guide member is disposed.

11 . The manufacturing method of a photovoltaic cell according to claim 8 , further comprising:
performing an exposure process for forming the first hydrophilic region after a photoresist layer is formed at a light incidence surface side of the substrate, and performing an exposure process for forming the second hydrophilic region after a photoresist layer is formed at a light emission surface side of the substrate, wherein a first distance from the photoresist layer to the condenser lens during the exposure process for forming the first hydrophilic region is different from a second distance from the photoresist layer to the condenser lens during the exposure process for forming the second hydrophilic region.

12 . The manufacturing method of a photovoltaic cell according to claim 11 , wherein the second distance is longer than the first distance.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Kasano Masahiro

Classifications

• H10F77/939

  Output lead wires or elements · CPC title

• H10F77/484

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

• H10F77/211

  for photovoltaic cells · CPC title

• H10F19/908

  for back-contact photovoltaic cells · CPC title

• H10F71/00 Primary

  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