Insulation paste, method for producing insulation paste, method for manufacturing solar cell device, and solar cell device

Patent metadata

Field	Value
Publication number	US-10861993-B2
Application number	US-201816007907-A
Country	US
Kind code	B2
Filing date	Jun 13, 2018
Priority date	Dec 25, 2015
Publication date	Dec 8, 2020
Grant date	Dec 8, 2020

Abstract

An insulation paste for forming a protective layer of a solar cell device includes: a siloxane resin; an organic solvent; and multiple fillers each having a surface covered with an organic coating containing at least one material different from a material of the siloxane resin. A method for producing the insulation paste includes: preparing the multiple fillers; and mixing together a precursor of the siloxane resin, water, a catalyst, an organic solvent, and the multiple fillers. A method for manufacturing a solar cell device includes: applying the insulation paste to the passivation layer; and drying the insulation paste to form the protective layer on the passivation layer. A solar cell device includes: the passivation layer located on a semiconductor region; and the protective layer located on the passivation layer and including a siloxane resin and dimethylpolysiloxane.

First claim

The invention claimed is:

1. A solar cell device, comprising:
a semiconductor substrate having a p-type semiconductor region on a surface of the semiconductor substrate;
a passivation layer located on the p-type semiconductor region, the passivation layer including an aluminum oxide; and
a protective layer located on the passivation layer, the protective layer containing a silicon oxide,
wherein the protective layer contains a siloxane resin and dimethylpolysiloxane, and wherein the siloxane resin consists of a material different than dimethylpolysiloxane and includes a siloxane bond in a main chain and a Si—O bond in a side chain.

2. The solar cell device according to claim 1 ,
wherein the dimethylpolysiloxane is terminated by a methyl group.

3. The solar cell device according to claim 2 ,
wherein the protective layer includes a Si—OH bond.

4. The solar cell device according to claim 2 , further comprising
a silicon oxide layer between the protective layer and the passivation layer, the silicon oxide layer being denser than the protective layer.

5. The solar cell device according to claim 1 ,
wherein the protective layer comprises 7% to 90% by mass of the siloxane resin.

Assignees

• Kyocera Corp

Inventors

• Ishikawa Shinya
• Shibahara Motoki
• Kitayama Satoshi
• Ota Daisuke
• Koide Takashi
• Kimura Tsuyoshi

Classifications

• H10F77/707

  of the substrates or of layers on substrates, e.g. textured ITO layer on a glass substrate · CPC title

• H10F77/315

  the coatings being antireflective or having enhancing optical properties · CPC title

• H10F77/311

  for photovoltaic cells · CPC title

• H10F71/129

  Passivating · CPC title

• H10F19/80

  Encapsulations or containers for integrated devices, or assemblies of multiple devices, having photovoltaic cells · CPC title