US 11,855,234 B2
Solar cell and method of manufacturing the same
Juhwa Cheong, Seoul (KR); Yundeok Yoon, Seoul (KR); Jaesung Kim, Seoul (KR); and Junyong Ahn, Seoul (KR)
Assigned to SHANGRAO JINKO SOLAR TECHNOLOGY DEVELOPMENT CO LTD, Jiangxi (CN)
Filed by Shangrao Jinko solar Technology Development Co., LTD, Jiangxi (CN)
Filed on Jul. 20, 2020, as Appl. No. 16/933,363.
Application 16/933,363 is a division of application No. 15/962,697, filed on Apr. 25, 2018, abandoned.
Claims priority of application No. 10-2017-0053771 (KR), filed on Apr. 26, 2017.
Prior Publication US 2020/0350445 A1, Nov. 5, 2020
Int. Cl. H01L 31/0236 (2006.01); H01L 31/18 (2006.01); H01L 31/068 (2012.01); H01L 21/02 (2006.01)
CPC H01L 31/02363 (2013.01) [H01L 21/02019 (2013.01); H01L 31/068 (2013.01); H01L 31/1804 (2013.01); Y02E 10/50 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of manufacturing a solar cell, the method comprising:
obtaining a semiconductor substrate having a first surface and a second surface opposite to the first surface;
forming a first uneven member on the first surface of the semiconductor substrate, the first uneven member having a pointed pyramidal shape;
forming a second uneven member on the second surface of the semiconductor substrate, the second uneven member having a pointed pyramidal shape;
removing portions of the second uneven member on the second surface of the semiconductor substrate to form a rounded uneven member having a rounded end portion, wherein the first uneven member having a pointed pyramidal shape on the first surface of the semiconductor substrate is preserved while forming the rounded uneven member having a rounded end portion;
forming a first conductive region at the first surface of the semiconductor substrate such that the first conductive region is arranged over the first uneven member having a pointed pyramidal shape;
forming a second conductive region on the second surface of the semiconductor substrate, wherein the second conductive region comprises a semiconductor layer different from the semiconductor substrate, and wherein the second conductive region is arranged over the rounded uneven member having a rounded end portion;
forming a first electrode electrically connected to the first conductive region; and
forming a second electrode electrically connected to the second conductive region.