Kyocera Corporation

Shinya Ishikawa

Tsuyoshi Kimura

Satoshi Kitayama

Daisuke Ota

Motoki Shibahara

Takashi Koide

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.

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

A solar cell element comprises a semiconductor substrate, a passivation layer, and first to third electrodes. The passivation layer with first holes is located on the semiconductor substrate. The first electrode is located in each of the first holes and electrically connected to the semiconductor substrate. The second electrode is electrically connected to the first electrode and located on the passivation layer. The third electrodes is electrically connected to the first electrode via the second electrode. The passivation layer includes a part where a ratio of an area occupied by the first holes in a first region adjacent to the third electrodes is smaller than a ratio of an area occupied by the first holes in a second region located farther away from the third electrodes in relation to the first region and having an area equal to an area of the first region in a perspective plan view.

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Higashiomi, Japan

Shinya Ishikawa