发明名称 |
Method for manufacturing an interdigitated back contact solar cell |
摘要 |
A method for manufacturing an interdigitated back contact solar cell. comprising the steps of: (a) providing a silicon substrate doped with a first dopant; (b) doping the rear surface of the silicon substrate with a second dopant in a first pattern; (c) forming a silicon dioxide layer on the rear surface; (d) depositing a silicon-containing paste comprising silicon-containing particles on the silicon dioxide layer in a second pattern; (e) exposing the substrate to a diffusion ambient, wherein the diffusion ambient comprises a third dopant and wherein the third dopant is a counter dopant to the second dopant; (f) heating the substrate in a drive-in ambient; and (g) removing the silicon dioxide layer and the doped silicate glass layer from the silicon substrate, wherein a region doped with the second dopant and a region doped with the third dopant collectively form an interdigitated pattern on the rear surface of the silicon substrate. |
申请公布号 |
US9059341(B1) |
申请公布日期 |
2015.06.16 |
申请号 |
US201414161891 |
申请日期 |
2014.01.23 |
申请人 |
E I DU PONT DE NEMOURS AND COMPANY |
发明人 |
Scardera Giuseppe;Kelman Maxim;Dugan Shannon;Poplavskyy Dmitry;Inns Daniel Aneurin;Bendimerad Karim Lotfi |
分类号 |
H01L21/00;H01L31/0224;H01L31/18 |
主分类号 |
H01L21/00 |
代理机构 |
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代理人 |
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主权项 |
1. A method for manufacturing an interdigitated back contact solar cell, comprising the steps of:
(a) providing a silicon substrate doped with a first dopant, the substrate comprising a front, sunward facing surface, and a rear surface; (b) doping the rear surface of the silicon substrate with a second dopant in a first pattern; (c) forming a silicon dioxide layer on the rear surface; (d) depositing a silicon-containing paste comprising silicon-containing particles on the silicon dioxide layer in a second pattern; (e) exposing the substrate to a diffusion ambient at a first temperature and for a first time period in order to form a doped silicate glass layer around the substrate, wherein the diffusion ambient comprises a third dopant and wherein the third dopant is a counter dopant to the second dopant; (f) heating the substrate in a drive-in ambient to a second temperature and for a second time in order to locally diffuse the third dopant into the rear surface underneath the second pattern and in order to diffuse the third dopant into the front surface; and (g) removing the silicon dioxide layer and the doped silicate glass layer from the silicon substrate, wherein a region doped with the second dopant and a region doped with the third dopant collectively form an interdigitated pattern on the rear surface of the silicon substrate. |
地址 |
Wilmington DE US |