Patent ID: 9312420
Filing Date: 2016-04-12
CPC Classification: H01L,Y02E,Y02P

Claim Text:
1. A method for manufacturing a solar cell, the method comprising: preparing a semiconductor substrate; forming a passivation layer comprising a first dopant on a surface of the semiconductor substrate; forming a selective emitter layer by locally heating a portion of the passivation layer; forming an electrode electrically connected to a first portion of the selective emitter layer after the forming of the selective emitter layer; and forming a layer for a dopant layer by doping a second dopant having a conductive type the same as the first dopant to one surface of the semiconductor substrate between the preparing of the semiconductor substrate and the forming of the passivation layer, wherein, in the forming of the selective emitter layer, the first dopant of the heated portion of the passivation layer is diffused into an inside of the semiconductor substrate by the locally heating to form the selective emitter layer, wherein the forming of the selective emitter layer is a separate process from the forming of the electrode, wherein the first dopant has a conductive type different from that of the semiconductor substrate, wherein the selective emitter layer comprises a first portion in contact with the electrode and a second portion other than the first portion, wherein, in the forming of the selective emitter layer, the portion of the passivation layer corresponding to the first portion of the selective emitter layer where the electrode is connected is heated, and wherein, in the forming of the selective emitter layer, the portion of the passivation layer corresponding to the first portion of the selective emitter layer being heated and the first dopant being diffused into the semiconductor substrate results in the first portion having a resistance lower than that of the second portion.