Solar cell and method of manufacturing the same
AssigneeSamsung SDI Co., Ltd.
InventorsJeong-Hoon Kim, Sang-Hyuck Ahn, Hyun-Chul Kim, Si-Young Cha, Nam-Seok Baik
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Abstract
A solar cell including a light absorption layer including a p-type compound semiconductor; and a buffer layer including a first buffer layer and a second buffer layer on the light absorption layer, the second buffer layer being between the first buffer layer and light absorption layer, and a zinc sulfide (ZnS) concentration of the first buffer layer being greater than a ZnS concentration of the second buffer layer is disclosed. Methods of manufacturing the solar cell are also disclosed.
Claims20
A solar cell comprising:
- a light absorption layer comprising a p-type compound semiconductor;
- and
- a buffer layer comprising a first buffer layer and a second buffer layer on the light absorption layer, the second buffer layer being between the first buffer layer and the light absorption layer, and a zinc sulfide (ZnS) concentration of the first buffer layer being greater than a ZnS concentration of the second buffer layer.
A solar cell comprising:
- a light absorption layer comprising a p-type compound semiconductor;
- and
- a buffer layer on the light absorption layer, the buffer layer having a ZnS concentration gradient, and a ZnS concentration of the buffer layer increasing along a direction from a surface of the buffer layer facing the light absorption layer to a surface of the buffer layer away from the light absorption layer.
A method of manufacturing a solar cell, the method comprising:
- preparing an aqueous solution comprising zinc sulfate (ZnSO4), thiourea (SC(NH2)2), and ammonium hydroxide (NH4OH);
- and
- immersing a light absorption layer comprising a p-type compound semiconductor in the aqueous solution for 7 minutes or more to form a buffer layer on the light absorption layer.
Dependencies are inferred from the claim text.