Solar cell, electronic device, and manufacturing method of solar cell

Patent metadata

Field	Value
Publication number	US-9653633-B2
Application number	US-201514813520-A
Country	US
Kind code	B2
Filing date	Jul 30, 2015
Priority date	Aug 6, 2014
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A power generating film is disposed on a substrate, a transparent conductive film is disposed on the power generating film in an overlapping manner, a first insulating film having a thickness of greater than or equal to 1 μm is disposed on the transparent conductive film, and the substrate is formed into a predetermined shape by irradiating the substrate with laser light which is condensed thereto and by spraying gas onto the substrate.

First claim

What is claimed is:

1. A solar cell, comprising:
a substrate;
a semiconductor film having a photoelectric conversion function which is disposed on the substrate;
a transparent conductive film which is disposed on the semiconductor film;
a protective film which is disposed on the transparent conductive film, the protective film having a cut-out portion in which the transparent conductive film is exposed;
a conductive material which is disposed on the transparent conductive film in the cut-out portion; and
a wiring member which is electrically connected to the transparent conductive film through the conductive material, wherein
the conductive material is sandwiched between the transparent conductive film and the wiring member, and
the protective film is in the same horizontal plane as the conductive material.

2. The solar cell according to claim 1 ,
wherein the protective film includes a region having conductivity and a region having insulating properties, and
the region having insulating properties is light transmissive.

3. The solar cell according to claim 1 ,
wherein a thickness of the protective film is greater than or equal to 1 μm.

4. An electronic device comprising a solar cell,
wherein the solar cell is the solar cell according to claim 1 .

5. The electronic device according to claim 4 ,
wherein the electronic device is a timepiece.

6. The solar cell according to claim 1 , further comprising:
an insulating film which is disposed in a layer in which the protective film is disposed, the insulating film extending along at least one side of the substrate.

7. The solar cell according to claim 1 , wherein the cut-out portion is disposed at a corner of the protective film.

Assignees

• Seiko Epson Corp

Inventors

• Nagano Daisuke

Classifications

• H01L31/18

  Electricity · mapped topic

• G04C10/02

  the power supply being a radioactive {or photovoltaic} source · CPC title

• H01L31/048 Primary

  Electricity · mapped topic

• G04G19/00

  Electric power supply circuits specially adapted for use in electronic time-pieces · CPC title

• Y02E10/50

  Photovoltaic [PV] energy · CPC title