Solar cell and method for manufacturing the same

摘要

A method for manufacturing a solar cell is discussed. The method may include injecting first impurity ions at a first surface of a substrate by using a first ion implantation method to form a first impurity region, the substrate having a first conductivity type and the first impurity ions having a second conductivity type, and the first impurity region having the second conductivity type; heating the substrate with the first impurity region to activate the first impurity region to form an emitter region from the first impurity region; etching the emitter region from a surface of the emitter region to a predetermined depth to form an emitter part from the emitter region; and forming a first electrode on the emitter part to connect to the emitter part and a second electrode on a second surface of the substrate to connect to the second surface of the substrate.

主权项

1. A method for manufacturing a solar cell, the method comprising:
injecting first impurity ions at a first surface of a substrate by using a first ion implantation method to form a first impurity region, the substrate having a first conductivity type and the first impurity ions having a second conductivity type opposite the first conductivity type, and the first impurity region having the second conductivity type; first heating the substrate with the first impurity region to activate the first impurity region to form an emitter region from the first impurity region; etching the emitter region from a surface of the emitter region to a predetermined depth to form an emitter part from the emitter region; forming a first electrode on the emitter part to connect to the emitter part by using a screen printing method, and then being dried; injecting second impurity ions at a second surface of the substrate by using a second ion implantation method to form a second impurity region of the first conductivity type, the second surface being opposite the first surface of the substrate; second heating the substrate with the second impurity region to activate the second impurity region to form a surface field region from the second impurity region; etching the surface field region from a surface of the surface field region to a predetermined depth to form a surface field part from the surface field region; and forming a second electrode on the surface field part to connect to the surface field part by using a screen printing method, and then being dried, wherein the emitter part comprises a first emitter portion having a first impurity doped thickness and a second emitter portion having a second impurity doped thickness greater than the first impurity doped thickness, wherein the surface field part comprises a first surface field portion having a first impurity doped thickness and a second surface field portion having a second impurity doped thickness greater than the first impurity doped thickness, wherein the first electrode is connected to the first surface of the substrate through the second emitter portion, and wherein the second electrode is connected to the second surface of the substrate through the second surface field portion.