Patent ID: 9312406
Filing Date: 2016-04-12
CPC Classification: H01L,Y02E

Claim Text:
1. An all back contact solar cell comprising: a single crystalline silicon substrate; a thin dielectric layer formed on a backside surface of the single crystalline silicon substrate; a first emitter of the solar cell, the first emitter of the solar cell being formed on the thin dielectric layer and comprising polycrystalline silicon doped to have a first polarity, wherein the thin dielectric layer is between the single crystal silicon substrate and the first emitter; a second emitter and a third emitter of the solar cell, the second and third emitters of the solar cell being formed in the single crystalline silicon substrate and comprising single crystalline silicon doped to have a second polarity opposite the first polarity, the first emitter being formed between the second and third emitters, the second and third emitters being formed starting from opposing ends of the first emitter; a first metal contact connected to the first emitter on a backside of the solar cell, the backside being opposite a front side of the solar cell that faces the sun during normal operation; a second metal contact connected to the second emitter on the backside of the solar cell; and a third metal contact connected to the third emitter on the backside of the solar cell.